What is the best type of orbit for  a satellite in a global mobile system for real-time data communications?
142151
Agreed.  Also, LEOs will have less delay time since they will be closer to the end user.
83795
There are literally thousands of satellites in orbit capable of both receiving and transmitting radio signals. Some of their names are Telstar, Comsat (Communication satellites), Cosmos 1602, GOES 7, Landsat 5, NOAA 12, Radarsat, and Seasat 1 (weather satellites).
1009085
Google earth works really well...just have to download it....but it wont be in real time everytime you use it..it sounds like you want it for security purposes...that I guess you would need a keyhole satellite for!!!
337304
A satellite transmits signals to the earth.it tracks the object by moving with the same speed as that of the car
78787
Global Transmission Services (GTS) is s new system for transferring radio signals from the International Space Station (ISS). Starting in the year 2000 it will be tested in the framework of a pilot project. GTS is the first experiment on the new space station and at the same time the possibilities of future commercial uses of the space station as a space-born platform will be investigated. The experiment is being supported by Daimler-Chrysler, Fortis Swiss Watches as well as the German Aerospace Center (DLR) and the European Space Agency (ESA).  \nTwo areas of applications will be investigated during the first phase of the experiment: the worldwide synchronization of watches and the deactivation of stolen vehicles.\n   \nThe new system consists of a computer system and a radio transmitter onboard the ISS. The system is controlled by a new ground control center located directly in Stuttgart. The monitoring and processing of the data take place in the control center on Earth. The data are then sent down to Earth from the transmitter in space.   \n\n\nFor additional information such as the advantages and disadvantages of such a system, click the link below and continue the article.
160814
It has to be at the equator.  It is the same reason that geostationary satellites are in orbit over the equator ...they always remain in the same position over the same spot of the Earth.
419025
Join US army.They have very good satalites.\nThere is no such live satelite for civilian use.
44799
You need a big dish antenna and a lot of power to transmit to a geo satellite.  If your cell phone had that, it would be to0 big and heavy to carry.  That's why towers combine calls from many different users and route them, as needed, to other towers via wires, microwaves, or satellite communications.
877309
Check into Qualcomm's Omnitracks system- it is world wide. The trucking and fishing company's in the USA and Brazil, Russia etc. Use it. Its a satallite tracking system that you can look up your truck on your account on the web- see messages, location etc... Qualcomm- San Diego.
27931
Satellite Telecom.  Companies have invested a lot of money in developing the infrastructure.  By the time they have it set up the sat phones will be comparable to regular Cell phones.
157367
The most common satellites use a C-Band frequency which "Beams" down the programs that we watch. Star Choice, Bell Express Vu, Directv, etc all use this type of frequency for that purpose. Those same satellites all use Ka-band and Ku-band for other purposes as in Satellite Internet and so on.\nAs for the names of each one, thats a little tougher, there are over 180 satellites in the sky for commercial use.\nThis site has a list of those satellites in order by what area of earth they are "beaming" to. http://www.lyngsat.com
332456
Each GPS satellite transmits data that indicates its location and the current time. All GPS satellites synchronize operations so that these repeating signals are transmitted at the same instant. The signals, moving at the speed of light, arrive at a GPS receiver at slightly different times because some satellites are farther away than others. The distance to the GPS satellites can be determined by estimating the amount of time it takes for their signals to reach the receiver. When the receiver estimates the distance to at least four GPS satellites, it can calculate its position in three dimensions.\nThere are at least 24 operational GPS satellites at all times. The satellites, operated by the U.S. Air Force, orbit with a period of 12 hours. Ground stations are used to precisely track each satellite's orbit.\n\n \nDetermining Position\nA GPS receiver "knows" the location of the satellites, because that information is included in satellite transmissions. By estimating how far away a satellite is, the receiver also "knows" it is located somewhere on the surface of an imaginary sphere centered at the satellite. It then determines the sizes of several spheres, one for each satellite. The receiver is located where these spheres intersect.\n\nBottom Line: u need at least 3 satellites to get the 3 unknowns X, Y, Z of ur location
140242
There are no live satellite images of your house available on the internet.  This is because imagery satellites fly in low earth orbit.  They circle the earth in two hours or less.  The images available on websites are collected over time.  Satellites in geosynchronous orbits circle the earth once in twenty four hours.  Because the earth also rotates about its axis in twentyfour hours, these appear to stay over the same spot on the equator.  But, these satellites are too high to provide detailed imagery.
965096
What you are probably looking for is an RBGAN or BGAN (Broadband Global Area Network). These are pretty much small satellite Internet terminals meant for use in remote locations. In fact, many of the "streamed" news reports you have seen from Iraq use this exact device. Because of of the wide variety of applications for these devices, there are also just as many accessories so you will have no trouble finding any adapters necessary to use/charge them in just about any situation. RBGANs are currently being phased out for the newer BGANS which means that there are very good prices on them right now, but coverage will not be available after 12/31/08. Sooo... If you know you won't need it past 2008, go for the RGBAN, otherwise spring for the BGAN. I suggest you go with the INMARSAT satellite system since it is very well known and the one I am most familiar with. Satellite internet is NOT fast (normally around 144kbps, NOT cheap and you WILL be charged by the meg (think $10/MB). You should check out http://www.outfittersatellite.com/rbgan.htm and http://www.bgan.us/personal/personal.cfm if you are still serious about getting satellite internet. Good luck!\n\nOh, and the INMARSAT system DOES cover all of Africa.
1120327
3-\nGOES-10 (West) and GOES-12 (East).  Goes-11 is in orbit but is not in operation; it is in case GOES-10 or GOES-12 has a problem it can take over while they are being repaired.\n\n**These are meteorological satellites.  As far as total geosynchronous satellites, there are approx. 300
477888
The Global telecommunications system (GTS) is a global network for the transmission of meteorological data from weather stations, satellites and numerical weather prediction centres.\n\nThe GTS consists of an integrated network of point-to-point circuits, and multi-point circuits which interconnect meteorological telecommunication centres. The circuits of the GTS are composed of a combination of terrestrial and satellite telecommunication links. They comprise point-to-point circuits, point-to-multi-point circuits for data distribution, multi-point-to-point circuits for data collection, as well as two-way multi-point circuits. Meteorological Telecommunication Centres are responsible for receiving data and relaying it selectively on GTS circuits. The GTS is organized on a three level basis:\n\nThe Main Telecommunication Network (MTN) \nThe Regional Meteorological Telecommunication Networks (RMTNs) \nThe National Meteorological Telecommunication Networks (NMTNs) \nSatellite-based data collection and/or data distribution systems are integrated in the GTS as an essential element of the global, regional and national levels of the GTS. Data collection systems operated via geostationary or near-polar orbiting meteorological/environmental satellites, including ARGOS, are widely used for the collection of observational data from Data Collection Platforms. Marine data are also collected through the International Maritime Mobile Service and through INMARSAT.
550313
Communications satellites allow telephone and data conversations to be relayed through the satellite. Typical communications satellites include Telstar and Intelsat. The most important feature of a communications satellite is the transponder -- a radio that receives a conversation at one frequency and then amplifies it and retransmits it back to Earth on another frequency. A satellite normally contains hundreds or thousands of transponders. Communications satellites are usually geosynchronous.