Satellites have been orbiting the earth for several decades now, and are constantly contributing to the evolution of global communication.
Satellite cell phones have made it possible for people to make phone calls from anywhere in the world, no matter how remote their location, and have been extremely useful in coordination of many activities ranging from scientific exploration to military operations.
Portable satellite radio is another important technology that has emerged in recent years, allowing users to subscribe to and access radio channels from around the world for either entertainment or informational purposes.
One small problem with satellite communication technology, however, is the sheer distance involved in communicating with orbiting satellites, which can cause a slight delay in transmission time. This, of course, is of no consequence to satellite radio, but it can be a slight problem for two-way communication services such as broadband and phone.
The only way to reduce the time delay involved in satellite transmission is to use lower orbits for satellites, thus reducing the distance involved in transmission. Lower orbits are already being used for some purposes, but there are many challenges that must be overcome in order to make such a transition.
Advancements in satellite technology have been plentiful in the past few years, and more are expected in the future. It will be very interesting to watch the development of this evolving technology over the coming years and beyond.
Saturday, November 3, 2007
Satellite Phones or Cell Phones
There are several factors that differentiate satellite phones from cell phones. How they work, their utility and cost just to name a few.
Functionality Differences
Cellular phones or cell phones use small stations or towers known as ‘cells’ from which they receive their signals and to which they send signals. As the user moves from one destination to the next, his call or his cellular service is passed on from cell to the next. The mobile handset is thus in continuous connectivity with the different cells of the network provider and the individual can talk on the move. This is thus known as mobile connectivity.
Satellite phones on the other hand, do not use ‘cells’ or towers. They work with satellites orbiting the Earth. These Low Earth Orbiting or LEO satellites receive signals from the satellite phone handsets and send signals to these handsets as required. The satellite phones send signals to the satellite, which passes it on to a gateway. The gateway routes the calls to the receiver. Also, all calls made to the satellite phones are routed via the satellites.
Differences In Area Coverage
Cellular phone companies generally provide network coverage in densely populated areas. Since the companies have to set up ‘cells’ to be able to provide coverage, they need a high number of subscribers to justify setting up the cell. In thinly populated areas or remote areas with difficult terrains, the cost of providing coverage is often more than the expected returns. Hence, while cell phones work great in densely populated areas, they may or may not work in inaccessible locations.
Satellite phones communicate with the LEO satellites and not with any ‘cells’ on Earth. Hence, the coverage provided by satellite phone companies is far greater than that provided by cellular phone companies. Since satellite companies don’t have to set up cells from destination to destination, they offer service in a wider area and some even offer it across the globe.
Usability Differences
Cell phones have become an absolute necessity for practically all urban residents. In fact, a large number of people are opting to have cell phones instead of the traditional landlines. Cell phones are perfect to use while on the move in metropolitan cities. For marketing and sales executives, employees, CEOs, managers, mothers, students and almost all people in different walks of life - cell phones provide a high value service. They are also a great option to surf the net, listen to music and exchange photos. In short, cell phones have become the single all-purpose media electronic instrument of the 21st century.
Satellite phones on the other hand, are perfect for use in remote and thinly populated areas where cellular companies do not provide network coverage. Satellite phones are also extremely handy in situations when cellular networks go down. Such situations generally arise in times of natural disasters like hurricanes, earthquakes and floods when the ‘cells’ that route calls are damaged.
Satellite phones have the advantage in such conditions since natural disasters do not affect the LEO satellites. Hence while cellular phone networks are down, satellite phones continue to function as normal. This has indeed saved many lives in the recent past.
Satellite phones are also the perfect option for companies that have research laboratories or departments in isolated areas like Alaska, Siberia and Antartica. Adventurers who frequently travel to densely populated tropical forests, high mountain areas and across oceans also prefer the better coverage provided by satellite phones.
Differences In Cost
As is to be expected, cellular phones are far cheaper to operate and maintain than satellite phones. The cellular phone handsets as well as the subscription plans offered by cellular service providers are extremely affordable and cost barely a few cents per minute.
Satellite phones on the other hand are expensive. The satellite phone hand sets or the fixed satellite phone sets cost a pretty penny as does the satellite phone service provided by leaders in the industry like Iridium and Globalstar. At an average satellite phones can cost anything from $600 to $1000 with costs going up to $1.50 per minute for talktime.
Thus, cell phones and satellite phones are both a boon to the world of communication and both service users in different ways and under differing conditions
Functionality Differences
Cellular phones or cell phones use small stations or towers known as ‘cells’ from which they receive their signals and to which they send signals. As the user moves from one destination to the next, his call or his cellular service is passed on from cell to the next. The mobile handset is thus in continuous connectivity with the different cells of the network provider and the individual can talk on the move. This is thus known as mobile connectivity.
Satellite phones on the other hand, do not use ‘cells’ or towers. They work with satellites orbiting the Earth. These Low Earth Orbiting or LEO satellites receive signals from the satellite phone handsets and send signals to these handsets as required. The satellite phones send signals to the satellite, which passes it on to a gateway. The gateway routes the calls to the receiver. Also, all calls made to the satellite phones are routed via the satellites.
Differences In Area Coverage
Cellular phone companies generally provide network coverage in densely populated areas. Since the companies have to set up ‘cells’ to be able to provide coverage, they need a high number of subscribers to justify setting up the cell. In thinly populated areas or remote areas with difficult terrains, the cost of providing coverage is often more than the expected returns. Hence, while cell phones work great in densely populated areas, they may or may not work in inaccessible locations.
Satellite phones communicate with the LEO satellites and not with any ‘cells’ on Earth. Hence, the coverage provided by satellite phone companies is far greater than that provided by cellular phone companies. Since satellite companies don’t have to set up cells from destination to destination, they offer service in a wider area and some even offer it across the globe.
Usability Differences
Cell phones have become an absolute necessity for practically all urban residents. In fact, a large number of people are opting to have cell phones instead of the traditional landlines. Cell phones are perfect to use while on the move in metropolitan cities. For marketing and sales executives, employees, CEOs, managers, mothers, students and almost all people in different walks of life - cell phones provide a high value service. They are also a great option to surf the net, listen to music and exchange photos. In short, cell phones have become the single all-purpose media electronic instrument of the 21st century.
Satellite phones on the other hand, are perfect for use in remote and thinly populated areas where cellular companies do not provide network coverage. Satellite phones are also extremely handy in situations when cellular networks go down. Such situations generally arise in times of natural disasters like hurricanes, earthquakes and floods when the ‘cells’ that route calls are damaged.
Satellite phones have the advantage in such conditions since natural disasters do not affect the LEO satellites. Hence while cellular phone networks are down, satellite phones continue to function as normal. This has indeed saved many lives in the recent past.
Satellite phones are also the perfect option for companies that have research laboratories or departments in isolated areas like Alaska, Siberia and Antartica. Adventurers who frequently travel to densely populated tropical forests, high mountain areas and across oceans also prefer the better coverage provided by satellite phones.
Differences In Cost
As is to be expected, cellular phones are far cheaper to operate and maintain than satellite phones. The cellular phone handsets as well as the subscription plans offered by cellular service providers are extremely affordable and cost barely a few cents per minute.
Satellite phones on the other hand are expensive. The satellite phone hand sets or the fixed satellite phone sets cost a pretty penny as does the satellite phone service provided by leaders in the industry like Iridium and Globalstar. At an average satellite phones can cost anything from $600 to $1000 with costs going up to $1.50 per minute for talktime.
Thus, cell phones and satellite phones are both a boon to the world of communication and both service users in different ways and under differing conditions
Spy Bugs
There are many different spy bugs that can be used to listen in on conversations. These can be bugs that you plant at a home, or listening devices that you wear on your person (or have someone else wear). But no matter how you use spy bugs, it is possible to glean useful information with them, whether you are an amateur, a professional, or are just looking for the truth.
The most common spy bugs are bugs that use a radio frequency to transmit the sounds around them. These bugs may be placed inside a home or office to catch conversations held in a room, or they may be hooked into a phone. When hooked into a phone, they can listen to both sides of a conversation over a phone line. Additionally, it is possible to wear these listening devices hidden on the body in what look regular items (pens, lighters, hats, etc.). The radio frequency is transmitted to a location where it can be heard, usually with no more than a regular FM radio.
Other spy bugs make use of ways that tap into the line itself and do not send radio transmissions. These types of bugs are harder to detect. A wiretap might fall into this category of direct bugs, as may a soft tap that makes use of computer software to listen to phone conversations. The best spy bugs, however, are the portable kind that go with the subject and allow you to phone in.
While it is possible to plant radio transmitting spy bugs on a person to go with her or him, it is far more practical to use a device that they trust, and that is unlikely to be shed or lost. This is a cell phone. Of course, spy bugs in the form of cell phones can only be used to learn information from people you know, and whom you might reasonably be expected to give a cell phone. A Spy Matrix Spy Phone is really a portable bug that lets you listen to conversations that make use of the cell phone as well as whatever is going on in the room at the time.
When you need to hear what is being said, the best things to use are spy bugs.
The most common spy bugs are bugs that use a radio frequency to transmit the sounds around them. These bugs may be placed inside a home or office to catch conversations held in a room, or they may be hooked into a phone. When hooked into a phone, they can listen to both sides of a conversation over a phone line. Additionally, it is possible to wear these listening devices hidden on the body in what look regular items (pens, lighters, hats, etc.). The radio frequency is transmitted to a location where it can be heard, usually with no more than a regular FM radio.
Other spy bugs make use of ways that tap into the line itself and do not send radio transmissions. These types of bugs are harder to detect. A wiretap might fall into this category of direct bugs, as may a soft tap that makes use of computer software to listen to phone conversations. The best spy bugs, however, are the portable kind that go with the subject and allow you to phone in.
While it is possible to plant radio transmitting spy bugs on a person to go with her or him, it is far more practical to use a device that they trust, and that is unlikely to be shed or lost. This is a cell phone. Of course, spy bugs in the form of cell phones can only be used to learn information from people you know, and whom you might reasonably be expected to give a cell phone. A Spy Matrix Spy Phone is really a portable bug that lets you listen to conversations that make use of the cell phone as well as whatever is going on in the room at the time.
When you need to hear what is being said, the best things to use are spy bugs.
The Ultimate Spy Cell Phone
Perhaps the most advanced portable bug on the market today is the Spy Matrix Spy Phone. This spy cell phone looks just like a regular phone, and it works just like a regular cell phone. The only difference is that is also a bug. This is the ultimate in listening devices. It is the best way to keep track of teenagers or significant others who show signs of straying. And, with a little ingenuity, you can even use this spy cell phone to perform surveillance on acquaintances and strangers.
The spy cell phone is especially helpful when you want to keep track of family members. This is because you can pass it off as a new phone for the family’s new cell phone plan. It is perfect. Give it to teenagers and you can go wherever they go. This Spy Matrix Spy Phone is equipped with a GPS tracker and a special microphone that picks up noises and conversation in its general vicinity. Not only that, but can also allow you to listen in to both ends of the conversation. You can know whether you teen are where she or he is supposed to be, and you can find out, from listening to what is going on in the room, whether there really is a study group.
A secret phone number allow you to activate the spy cell phone without the subject knowing that you have done so. You call the secret number (there is a second real number for regular calling purposes) and the phone quietly turns on and begins giving you access. You can “forget” it in a room or leave it to “charge” and hear what others are saying. This is a device that is also useful when performing professional surveillance for clients. No matter what you want to use the phone for, the spy cell phone is a device that few people would suspect as being a bug — especially since it works just like a normal cell phone in all respects.
Stop wondering what is really going on and find out for sure. When you have the Spy Matrix Spy Phone you do not just have any phone. You have a real, top of the line spy cell phone.
The spy cell phone is especially helpful when you want to keep track of family members. This is because you can pass it off as a new phone for the family’s new cell phone plan. It is perfect. Give it to teenagers and you can go wherever they go. This Spy Matrix Spy Phone is equipped with a GPS tracker and a special microphone that picks up noises and conversation in its general vicinity. Not only that, but can also allow you to listen in to both ends of the conversation. You can know whether you teen are where she or he is supposed to be, and you can find out, from listening to what is going on in the room, whether there really is a study group.
A secret phone number allow you to activate the spy cell phone without the subject knowing that you have done so. You call the secret number (there is a second real number for regular calling purposes) and the phone quietly turns on and begins giving you access. You can “forget” it in a room or leave it to “charge” and hear what others are saying. This is a device that is also useful when performing professional surveillance for clients. No matter what you want to use the phone for, the spy cell phone is a device that few people would suspect as being a bug — especially since it works just like a normal cell phone in all respects.
Stop wondering what is really going on and find out for sure. When you have the Spy Matrix Spy Phone you do not just have any phone. You have a real, top of the line spy cell phone.
Telephone Bugs and Phone Taps
When making use of telephone bugs, it can be very frustrating to be constantly checking, only to find that you missed a call. You have a busy life. Other things to do, other clients to work for, a life to live. You can’t just be sitting there trying to play hit and miss with telephone bugs. This is where the new generation of bugs comes in. It is possible to use a bug that will actually call you when a phone call is made. That way you need not miss a conversation that you cannot afford to miss.
Traditional bugs require that you listen to the transmissions or call in to see if a call is being placed. Additionally, some telephone bugs only allowed you to hear one end of the conversation. Neither of these things is very savory, nor do the provide help to you as you frantically try to listen in at just the right time. Additionally, many transmitters run the risk of being found as they transmit the signal out. With telephone bugs that call you, you can listen to both ends of the conversation, and receive notification when a call is placed or received by your subject.
The first telephone bugs that work in this manner are bugs that look like cell phones. You plug them in to share the same line as the regular phone, and they look like they were forgotten or like they are charging. These phones can be programmed to silently ring your preferred number whenever the home phone goes off. And it is set up so that when you pick up to listen in, you are listening as if you were on another phone in the house (just like mom and dad did when you called home from college). You hear both ends, and neither party is the wiser.
Other telephone bugs that can be programmed to call you are more high tech cell phones. You give the phone to the subject (or have your client do so) and then you wait. These phones work like regular cell phones. The person talks normally and receives calls normally. But every time he or she uses the phone (place or receive) the phone dials you and lets you know.
No matter which product you choose, you don’t have to miss a call when you are called by your telephone bugs.
Traditional bugs require that you listen to the transmissions or call in to see if a call is being placed. Additionally, some telephone bugs only allowed you to hear one end of the conversation. Neither of these things is very savory, nor do the provide help to you as you frantically try to listen in at just the right time. Additionally, many transmitters run the risk of being found as they transmit the signal out. With telephone bugs that call you, you can listen to both ends of the conversation, and receive notification when a call is placed or received by your subject.
The first telephone bugs that work in this manner are bugs that look like cell phones. You plug them in to share the same line as the regular phone, and they look like they were forgotten or like they are charging. These phones can be programmed to silently ring your preferred number whenever the home phone goes off. And it is set up so that when you pick up to listen in, you are listening as if you were on another phone in the house (just like mom and dad did when you called home from college). You hear both ends, and neither party is the wiser.
Other telephone bugs that can be programmed to call you are more high tech cell phones. You give the phone to the subject (or have your client do so) and then you wait. These phones work like regular cell phones. The person talks normally and receives calls normally. But every time he or she uses the phone (place or receive) the phone dials you and lets you know.
No matter which product you choose, you don’t have to miss a call when you are called by your telephone bugs.
GPS Tracking Device
GPS is one of the newest crazes on the Market today. GPS or global positioning system tracks your locations from a satellite which makes it a popular feature in cars. When you’re on a trip it can also help you find your way around with out getting lost. While GPS tracking can help track your location it also works in another way. You can use GPS tracking to track some ones location.
Cell phones have become something that everyone now carries. Cell phones are becoming more and more technologically advanced with more and more features. One of the newest features on cell phones is GPS. GPS is now available in almost everything from cars to cell phones. Cell phone GPS tracking is the newest feature on many cell phones. Locating someone is a popular job for a lot of detectives and cell phone GPS tracking is one thing that can make this task a lot easier.
Taking advantage of cell phone GPS tracking can help with the location of someone if they should come up lost. Cell phone GPS tracking can track their exact location. This can make locating the lost much faster and more efficient.
Several different kinds of GPS tracking products are available. They also offer several different products to meet all of your surveillance needs such as cameras, night vision products, listening devices and many other kinds of products to help get the job done right and prove the case.
Cell phones have become something that everyone now carries. Cell phones are becoming more and more technologically advanced with more and more features. One of the newest features on cell phones is GPS. GPS is now available in almost everything from cars to cell phones. Cell phone GPS tracking is the newest feature on many cell phones. Locating someone is a popular job for a lot of detectives and cell phone GPS tracking is one thing that can make this task a lot easier.
Taking advantage of cell phone GPS tracking can help with the location of someone if they should come up lost. Cell phone GPS tracking can track their exact location. This can make locating the lost much faster and more efficient.
Several different kinds of GPS tracking products are available. They also offer several different products to meet all of your surveillance needs such as cameras, night vision products, listening devices and many other kinds of products to help get the job done right and prove the case.
GPS Tracker
The GPS tracker is fast becoming a staple in society. This is because there are so many uses for these devices. While GPS technology (short for global positioning system) was originally developed for the military, it is now widely used in things like cars and golf carts — even cell phones. There are even types of GPS tracker that are small enough to be worn on a body or slipped discreetly into a small pocketbook. These handy devices allow people to keep track of others as well as valuables from anywhere where they have Internet access.
One of the most popular uses for the GPS tracker is in cars. This is because a tracker can help the driver pinpoint his or her exact location without any trouble. On top of that, it is also a great way to track the vehicle should it be stolen. Also, service such as OnStar can use a GPS tracker in your car to send emergency help in the event of a car wreck and the driver’s incapacity.
And, as one would expect from the name GPS tracker, a GPS tracking system can help you keep tabs on loved ones and even pets. Some trackers are small enough to be attached without too much trouble to a dog or cat. This way, if Fido the dog or Fifi the cat slips away, you can find the errant critter without too much trouble. The same is true with kids. Trackers fit easily in backpacks and are even built into some cell phones. This means that you can be aware of exactly where your teen is at all times.
There are also many recreational uses for the GPS tracker. Geo-caching has become a popular pastime among some. Trackers can help enthusiasts plot the position of the next treasure and then leave something of their own. Additionally, many high-end golf courses equip their carts with tracking that allows you to map the course, and even figure out how far their ball has yet to go.
Acquiring a GPS tracker is fairly easy, and its usefulness is worth whatever amount is paid for it. It is possible to get one for right around $300, but most of them fall between $400 and $1,000 in price for a good GPS tracker
One of the most popular uses for the GPS tracker is in cars. This is because a tracker can help the driver pinpoint his or her exact location without any trouble. On top of that, it is also a great way to track the vehicle should it be stolen. Also, service such as OnStar can use a GPS tracker in your car to send emergency help in the event of a car wreck and the driver’s incapacity.
And, as one would expect from the name GPS tracker, a GPS tracking system can help you keep tabs on loved ones and even pets. Some trackers are small enough to be attached without too much trouble to a dog or cat. This way, if Fido the dog or Fifi the cat slips away, you can find the errant critter without too much trouble. The same is true with kids. Trackers fit easily in backpacks and are even built into some cell phones. This means that you can be aware of exactly where your teen is at all times.
There are also many recreational uses for the GPS tracker. Geo-caching has become a popular pastime among some. Trackers can help enthusiasts plot the position of the next treasure and then leave something of their own. Additionally, many high-end golf courses equip their carts with tracking that allows you to map the course, and even figure out how far their ball has yet to go.
Acquiring a GPS tracker is fairly easy, and its usefulness is worth whatever amount is paid for it. It is possible to get one for right around $300, but most of them fall between $400 and $1,000 in price for a good GPS tracker
Keep Tabs on Your Teens
Spy gadgets are useful for more than just performing surveillance on people you do not know, or for protecting yourself from surveillance. Spy gadgets are increasingly helpful in keeping track of where your teenagers are and what they are doing. With all of the risks in the world today, it is no surprise that one might be concerned for the wellbeing of one’s children. With the right spy gadget, or combination of spy gadgets, it is possible to be sure of where your child is, and with whom he or she is keeping company.
One of the most basic spy gadgets that can help you understand where your teen is going is a GPS tracker. The most common tracker is a vehicle tracker. This way you can figure out where the car is at all times, and even keep tabs on where is has been. The problem is that such a device can be fooled. You teen need only to drive the car to the approved destination before removing to a friend’s car and taking off to someplace else. This is where a cell phone GPS tracker comes in handy.
Cell phone spy gadgets are increasingly popular because they look like and act just like regular cell phones. It is possible to get a cell phone with a tracking device that allows you to continue to track your teen even after the car is left behind. Just buy your child a hip new cell phone and she or he will be glad to have it. Then it can tell you where you’re teen is, and where you’re teen has been.
Knowing where you’re teen is important, but what is she or he doing? After all, maybe he or she is at Sally’s where they should be having a study group. But what is going on? Are they really studying, or are they doing something else. Spy gadgets like the spy phone go beyond simply tracking movement. They can be secretly activated to let you hear what is going on inside the room. You can listen to conversations and determine whether or not the kids are studying.
Knowing your kids are safe can easily be accomplished with the help a couple of well-chosen spy gadgets.
One of the most basic spy gadgets that can help you understand where your teen is going is a GPS tracker. The most common tracker is a vehicle tracker. This way you can figure out where the car is at all times, and even keep tabs on where is has been. The problem is that such a device can be fooled. You teen need only to drive the car to the approved destination before removing to a friend’s car and taking off to someplace else. This is where a cell phone GPS tracker comes in handy.
Cell phone spy gadgets are increasingly popular because they look like and act just like regular cell phones. It is possible to get a cell phone with a tracking device that allows you to continue to track your teen even after the car is left behind. Just buy your child a hip new cell phone and she or he will be glad to have it. Then it can tell you where you’re teen is, and where you’re teen has been.
Knowing where you’re teen is important, but what is she or he doing? After all, maybe he or she is at Sally’s where they should be having a study group. But what is going on? Are they really studying, or are they doing something else. Spy gadgets like the spy phone go beyond simply tracking movement. They can be secretly activated to let you hear what is going on inside the room. You can listen to conversations and determine whether or not the kids are studying.
Knowing your kids are safe can easily be accomplished with the help a couple of well-chosen spy gadgets.
Using Spy Tools
Spy tools have many uses, many of them exciting, and quite a few of them mundane. But one of the widest uses of spy tools is to detect infidelity in a partner. The reason these are so widespread in investigations into infidelity is because such tools are meant to be used covertly to discover things that people want to keep hidden. And infidelity is one of those things that is meant to be hidden. The great thing about the availability of technology today is that there is no reason to hire a private investigator anymore because you can complete the surveillance yourself with your own spy tools.
One of the more effective spy tools is a GPS tracker. A tracking device will help you keep tabs on where your partner goes. A tracker can be put in a car, so that you can know where it is driven, or even slipped into a purse. Many cell phones now come with GPS tracking devices, so you can use that to track a loved one under suspicion. Most trackers also allow you see not only where the person is at the time, but also where the person has been.
Of course, tracking spy tools do not always provide enough hard evidence. What is needed in such cases is a phone tap or a bug. The less expensive listening devices can allow you to easily hook into a line, or even listen from a distance away. Those that hook into a line can allow you to listen to both ends of the conversation. If you are looking for something a little higher-end, spy phones that work like cell phones can help you hear everything that is going on in the vicinity of phone, even if it is not in use by your subject.
Finally, for hard proof that you have a cheating partner, it is possible to use a kit that allows you to detect bodily fluids on underwear. These spy tools can help you compare the results to your own fluids, and determine whether or not the two match.
You can either substantiate your trust in your partner, or catch him or her red-handed, when you make good use of spy tools.
One of the more effective spy tools is a GPS tracker. A tracking device will help you keep tabs on where your partner goes. A tracker can be put in a car, so that you can know where it is driven, or even slipped into a purse. Many cell phones now come with GPS tracking devices, so you can use that to track a loved one under suspicion. Most trackers also allow you see not only where the person is at the time, but also where the person has been.
Of course, tracking spy tools do not always provide enough hard evidence. What is needed in such cases is a phone tap or a bug. The less expensive listening devices can allow you to easily hook into a line, or even listen from a distance away. Those that hook into a line can allow you to listen to both ends of the conversation. If you are looking for something a little higher-end, spy phones that work like cell phones can help you hear everything that is going on in the vicinity of phone, even if it is not in use by your subject.
Finally, for hard proof that you have a cheating partner, it is possible to use a kit that allows you to detect bodily fluids on underwear. These spy tools can help you compare the results to your own fluids, and determine whether or not the two match.
You can either substantiate your trust in your partner, or catch him or her red-handed, when you make good use of spy tools.
Cell Phone Location Tracking
What is Location Tracking?
Location tracking is becoming easier to do. Before, investigators had to talk to people to find out where someone was. This took many hours with little chance for success. Today location tracking is much easier with the innovation of GPS products. This new technology has made it much easier to locate the missing.
GPS works by satellite to track the position and determines where the GPS receiver is. The hope is that the person that it lost has a GPS receiver on them so their location can be tracked. This may sound like a rare thing that only happens in the movies, when they are able to track someone’s location.
On the contrary, GPS receivers are becoming more and more popular. The tools in movies are a little more realistic these days than they used to be. Location tracking is more popular with the general public for directions. What they do not realize is that the location tracking that they use to keep from getting lost can also be used to find them.
While some may be alarmed at the loss of privacy, it is also a safety feature. When someone is kidnapped or just disappears, their cars, cell phones and other products with GPS receivers can help find them with location tracking. Many different kinds of location tracking products are available Along with location tracking products, this website has many other surveillance products that are also available to meet the needs of your surveillance needs.
Location tracking is becoming easier to do. Before, investigators had to talk to people to find out where someone was. This took many hours with little chance for success. Today location tracking is much easier with the innovation of GPS products. This new technology has made it much easier to locate the missing.
GPS works by satellite to track the position and determines where the GPS receiver is. The hope is that the person that it lost has a GPS receiver on them so their location can be tracked. This may sound like a rare thing that only happens in the movies, when they are able to track someone’s location.
On the contrary, GPS receivers are becoming more and more popular. The tools in movies are a little more realistic these days than they used to be. Location tracking is more popular with the general public for directions. What they do not realize is that the location tracking that they use to keep from getting lost can also be used to find them.
While some may be alarmed at the loss of privacy, it is also a safety feature. When someone is kidnapped or just disappears, their cars, cell phones and other products with GPS receivers can help find them with location tracking. Many different kinds of location tracking products are available Along with location tracking products, this website has many other surveillance products that are also available to meet the needs of your surveillance needs.
Where Did Cell Phones Come From?
In 1949 the first car phone service was introduced. It was called “Mobile Telephone Service” (MTS). But the beginning of wireless communication started many years earlier, in 1895, when an Italian physicist named Guglielmo Marconi successfully sent wireless signals a distance of one and one half miles.
In 1896 Marconi was granted the world’s first patent for a wireless telegraphy system. In 1897 he formed The Wireless Telegraph and Signal Company. During that same year he successfully sent wireless signals a distance of twelve miles.
In 1901 Marconi proved the curve of the earth did not affect the successful sending of wireless waves. He proved it by transmitting signals from Cornwall, England to St. John’s, Newfoundland, which was a distance of over two thousand miles.
Marconi, along with other scientists and researchers, continued to work and do research on wireless transmissions. In 1932 the world’s first microwave radiotelephone link was established between the Pope’s summer home in the small Italian town of Caster Gandolfo and Vatican City, a distance of approximately thirty miles.
The first ship-to-shore radio conversation took place in 1922 from the ship S.S. America, which was 400 miles at sea. Inter-continent telephone communications between the United States and England occurred in the mid 1930’s.
As technology improved, interest in a car phone service developed. The first car phone service that was introduced in 1949 was a mobile service, but the equipment was big and heavy. The phone required a large receiver (about the size of a large piece of luggage). It was placed in the trunk of the vehicle. To talk on the phone, a button had to be pushed. To listen to the other person, the button had to be released. It was similar to using a two-way radio. A person couldn’t talk and listen at the same time. That technology came later.
Phone calls from the first mobile phone service were not direct-dialed. Instead, an operator working for the mobile phone service company answered when the phone was picked up. The operator connected the caller to the phone company operator, who then placed the call. By the early 1960’s the technology had improved, but only slightly. One step in the connection process was eliminated. The phone was able to connect directly to the phone company, saving the caller the step of having to connect to the mobile phone service operator first. The improved service was called “Improved Mobile Telephone Service” or IMTS.
By the early part of the 1980’s the phones had full-duplex capability. This meant a person could listen and talk at the same time. The phones and receivers were still heavy though. And, because the IMTS phones were a type of scanner, it wasn’t unusual for a person to press a channel button on the phone and hear parts of someone else’s conversation.
Technology continued to improve and continues to improve today. Cell phones are very popular. Today they are a truly mobile device and are easy to transport. Some of the cell phones available today only weigh a few ounces. Some of the small cell phones can be tricky to use though because the buttons on them are very small.
Cellular technology continues to improve. In the United States, carriers have been moving from analog technology to digital technology. One big reason the move to digital technology has been made in recent years is because it allows networks to carry more callers at one time. Calls are also more secure on digital networks, but are still far from being totally secure.
Today, people experience fewer dropped calls, and with the expansion of networks, there are getting to be fewer areas where there is no reception at all. And although many younger people are choosing to have cell phone over a land line phone, there are still many people who are not yet willing to give up their land line phones
In 1896 Marconi was granted the world’s first patent for a wireless telegraphy system. In 1897 he formed The Wireless Telegraph and Signal Company. During that same year he successfully sent wireless signals a distance of twelve miles.
In 1901 Marconi proved the curve of the earth did not affect the successful sending of wireless waves. He proved it by transmitting signals from Cornwall, England to St. John’s, Newfoundland, which was a distance of over two thousand miles.
Marconi, along with other scientists and researchers, continued to work and do research on wireless transmissions. In 1932 the world’s first microwave radiotelephone link was established between the Pope’s summer home in the small Italian town of Caster Gandolfo and Vatican City, a distance of approximately thirty miles.
The first ship-to-shore radio conversation took place in 1922 from the ship S.S. America, which was 400 miles at sea. Inter-continent telephone communications between the United States and England occurred in the mid 1930’s.
As technology improved, interest in a car phone service developed. The first car phone service that was introduced in 1949 was a mobile service, but the equipment was big and heavy. The phone required a large receiver (about the size of a large piece of luggage). It was placed in the trunk of the vehicle. To talk on the phone, a button had to be pushed. To listen to the other person, the button had to be released. It was similar to using a two-way radio. A person couldn’t talk and listen at the same time. That technology came later.
Phone calls from the first mobile phone service were not direct-dialed. Instead, an operator working for the mobile phone service company answered when the phone was picked up. The operator connected the caller to the phone company operator, who then placed the call. By the early 1960’s the technology had improved, but only slightly. One step in the connection process was eliminated. The phone was able to connect directly to the phone company, saving the caller the step of having to connect to the mobile phone service operator first. The improved service was called “Improved Mobile Telephone Service” or IMTS.
By the early part of the 1980’s the phones had full-duplex capability. This meant a person could listen and talk at the same time. The phones and receivers were still heavy though. And, because the IMTS phones were a type of scanner, it wasn’t unusual for a person to press a channel button on the phone and hear parts of someone else’s conversation.
Technology continued to improve and continues to improve today. Cell phones are very popular. Today they are a truly mobile device and are easy to transport. Some of the cell phones available today only weigh a few ounces. Some of the small cell phones can be tricky to use though because the buttons on them are very small.
Cellular technology continues to improve. In the United States, carriers have been moving from analog technology to digital technology. One big reason the move to digital technology has been made in recent years is because it allows networks to carry more callers at one time. Calls are also more secure on digital networks, but are still far from being totally secure.
Today, people experience fewer dropped calls, and with the expansion of networks, there are getting to be fewer areas where there is no reception at all. And although many younger people are choosing to have cell phone over a land line phone, there are still many people who are not yet willing to give up their land line phones
Your Cell Phone And 911
If you're one of the millions of cell phone users who count on their wireless phone for emergency 911 calling........
You might want to think again.
Unfortunately, there's no guarantee that your 911 call will be routed to an emergency call center. Much less, the emergency dispatcher will have the ability to pinpoint the call's location.
Why?
Part of the problem is lack of service. Often, in more rural areas, your cell phone has fewer towers available to receive reception. And, many of those towers are designed for analog calls - not digital.
But, since the FCC does not require it, fewer carriers offer analog service -- or the ability to connect to it.
Not surprising, since much of the carriers' revenue is dependant on features available only on digital networks.
Another problem?
There is no uniform Ehanced 911 system (E911) for wireless carriers. The FCC neglected to force the carriers to conform their E911 systems to a single technology.
Because of this, there are now two incompatable E911 systems in the works.
Nextel, Sprint and Verizon each have cell phones available that use the Global Positioning System (GPS) to find a caller's location. While Cingular and T-Mobile rely on a triangulation system.
Unfortunately, both E911 systems have their flaws. The GPS system needs a minimum of three satalites to be able to "read" the handset's location. Accuracy can be hampered by heavy vegetation, mountains or tall buildings.
The triangulation system also has its shortcomings, because it relies on the strength and timing of cell towers to determine a location. It, too, requires multiple towers for accuracy. This becomes more difficult in rural areas where towers are scarce.
To compound the problem, Emergency Call Centers are not equipt with the technology needed to field E911 calls. Most smaller centers lack the funding for the sophisticated equiptment, while others lack the knowledge on how to integrate it to their existing system.
According to a 2004 article in the San Diego Union Tribune, only about 12% of the country's 911 centers had the ability to pinpoint the location of wireless phone users emergency calls.
Which cell phone is best?
Dual band, or tri-band phones, allow both analog and digital frequencies. If a 911 call does not connect in a digital mode, the alternate analog network is available.
The FCC also requires that any carrier offering multi-frequency phones must allow the 911 call to roam to another service, if the call can not be completed on their own network.
Currently, only Cingular and Verizon offer dual or tri-bands for both their service and handsets. Sprint PCS and T-Mobile wireless phones operate on a digital band, but allow analog roaming.
Nextel uses its own iDEN network, which has limited roaming ability.
You might want to think again.
Unfortunately, there's no guarantee that your 911 call will be routed to an emergency call center. Much less, the emergency dispatcher will have the ability to pinpoint the call's location.
Why?
Part of the problem is lack of service. Often, in more rural areas, your cell phone has fewer towers available to receive reception. And, many of those towers are designed for analog calls - not digital.
But, since the FCC does not require it, fewer carriers offer analog service -- or the ability to connect to it.
Not surprising, since much of the carriers' revenue is dependant on features available only on digital networks.
Another problem?
There is no uniform Ehanced 911 system (E911) for wireless carriers. The FCC neglected to force the carriers to conform their E911 systems to a single technology.
Because of this, there are now two incompatable E911 systems in the works.
Nextel, Sprint and Verizon each have cell phones available that use the Global Positioning System (GPS) to find a caller's location. While Cingular and T-Mobile rely on a triangulation system.
Unfortunately, both E911 systems have their flaws. The GPS system needs a minimum of three satalites to be able to "read" the handset's location. Accuracy can be hampered by heavy vegetation, mountains or tall buildings.
The triangulation system also has its shortcomings, because it relies on the strength and timing of cell towers to determine a location. It, too, requires multiple towers for accuracy. This becomes more difficult in rural areas where towers are scarce.
To compound the problem, Emergency Call Centers are not equipt with the technology needed to field E911 calls. Most smaller centers lack the funding for the sophisticated equiptment, while others lack the knowledge on how to integrate it to their existing system.
According to a 2004 article in the San Diego Union Tribune, only about 12% of the country's 911 centers had the ability to pinpoint the location of wireless phone users emergency calls.
Which cell phone is best?
Dual band, or tri-band phones, allow both analog and digital frequencies. If a 911 call does not connect in a digital mode, the alternate analog network is available.
The FCC also requires that any carrier offering multi-frequency phones must allow the 911 call to roam to another service, if the call can not be completed on their own network.
Currently, only Cingular and Verizon offer dual or tri-bands for both their service and handsets. Sprint PCS and T-Mobile wireless phones operate on a digital band, but allow analog roaming.
Nextel uses its own iDEN network, which has limited roaming ability.
Friday, November 2, 2007
cell phone ping
There are two ways that celluar (cell) phones are located, depending on thecell phone itself, and the technology that is built in to that cell phone.Older cell phones are located via a process of signal triangulation, whilenewer phones have a Global Postitioning System (GPS) built in to them. Inpractice, one, the other or both can be used to locate a cell phone.Triangulation can be done on most any cell phone, depending on the locationof the cell phone and any nearby towers. GPS locating depends on the cellphone being so equipped. There is a federal mandate that pretty much allcell phone companies, including Verizon, will be able to locate a cell phonebased on one, the other or both methods.Here is more information on both processes.IT Digest - Ingenious Tejas's Digest Blog http://geekswithblogs.net/tpatel/archive/2004/06/29/7329.aspx"Cell phones are two way radio transmitters that work by connecting to anearby tower and exchanging data. Despite the FCC's limitation on maximumpower output of a cell phone, they are still able to connect with towersmiles away at UHF frequencies ... Because cell phones put out a constant RFoutput (sometimes pulsed) they can be tracked using the tower triangulationmethod where the network administrators can find your precise location withtheir administrative network access."The Graduate School and University Center at the City University of New York(CUNY) has "Intro to Mapping Sciences" taught by Doug Williamson. http://www.geography.hunter.cuny.edu/~dougwill/CRIME/the_district/web_site/ep19/ep19.htm"Phase II of the FCC regulations will begin to be implemented in the fall of2001. During Phase II, wireless carriers and the PSAPs will be upgradingtheir systems to provide more exact geographic coordinates. Two methods willbe employed:1) triangulation: new receivers will be added to the tower arrays that willbe able to perform triangulation; and 2) global positioning receivers (GPS)may be added to new wireless phones.""Cell-phone companies add tracking abilities" was a Knight Ridder distributedarticle, dated Wednesday, July 20, 2005, written for the Dallas Morning Newsby Terry Maxon, here presented on the Portsmouth Herald web site.http://www.seacoastonline.com/news/07212005/biz_nati/53872.htm"However, a federal mandate requiring cell phones to automatically tell 911centers where the caller is located has speeded adoption.That can be accomplished through ground-based triangulation, in which thephone's location is determined by figuring its relative distance from variouscell stations. But most large cellular companies appear to be embracing theGPS method....Nextel has had GPS technology in every phone since November 2002. Sprint andVerizon phones also contain GPS technology, allowing them to provide locatorservices if they desire."This last article is a great one to read, as it speaks to how the technologyhas commerical applications, such as allowing shuttle companies track theirvans and giving directions to people over their cell phones.Here are some Verizon links on the subject and related services they offer.Frequently Asked Questions - Answers to FAQs http://www.verizonwireless.com/b2c/dispatcher?action=DISPLAY&item=_FAQ_TOPIC&topicID=243"The GPS (Global Positioning System) locator chip, which is present in allwireless phones we currently sell, except the BlackBerry 6750, is used solelyfor tracking purposes by Emergency 911 Services and does not function like atypical GPS device....Phase II Enhanced 911 rules requires wireless carriers to automaticallyprovide the telephone number of the 911 caller and far more precise locationinformation, within 50 to 100 meters in most cases.The first two steps have been implemented, however the third step (Phase II)is still in progress."Small/Medium Business - Fleet Administratorhttp://www.verizonwireless.com/b2c/businessSolutions/smallMediumBusiness/custom.jsp"Locate, monitor and manage vehicles equipped with the necessary vehicletracking hardware from any office computer."The technical terms for these services are ones such as "cellular phone GPSlocating" and "cellular phone signal traingulation" and E991 locating.The requirements for this technology came from the Federal CommunicationsCommission (FCC) wireless "Enhanced 911" (E911) rules.http://www.fcc.gov/911/enhanced/"The wireless E911 program is divided into two parts - Phase I and Phase II.Phase I requires carriers, upon appropriate request by a local Public SafetyAnswering Point (PSAP), to report the telephone number of a wireless 911caller and the location of the antenna that received the call. Phase IIrequires wireless carriers to provide far more precise location information,within 50 to 300 meters in most cases."More information on Phase II from this Wireless Advisor forum.http://forums.wirelessadvisor.com/archive/index.php/t-2863.html"In the second phase, cell phone companies have two options for significantlyimproving the locating capacity. They can install GPS chips in theirtelephones. The chip determines the phone’s location (in hours, minutes, andseconds of longitude and latitude) by receiving signals beamed down from anarray of satellites. The chip determines the location based on differentarrival times of these signals. Alternatively, a cell phone company cancomply with the mandate by using information provided by its network. Thisapproach uses towers and antennae in the carrier's network to measure thetiming of signals emitted from the phone, and thus its location ..."
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