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
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