What are active & passive satellites ?
540687
An active satellite is a one that generates power for its own functioning.\n\nA passive satellite needs external power supply for its operation. The external power supply may be provided with solar cells etc.
383921
Try Google Earth. \n\nhttp://earth.google.com/\n\n\nSorry, just re-read your question. It's not live, but they should have satellite images.
998761
Its my understanding that Japan is still testing theirs, but they have one. Russia had one (Buran) but stopped flying it several years ago, and China plans on one in the future but has none as of yet. I dont think India have one they use other methods to launch satellites. Then there's ours here in America.  Here's a link to what ours are or were called.\n\nhttp://www.hq.nasa.gov/osf/shuttle/orbiters.html\n\nand here's a list of sites that talk about the others a bit.\n\nhttp://www.space.com/missionlaunches/china_reaction_031014a.html\n\nhttp://www.space.com/missionlaunches/nasda_shuttle_021018.html\n\nhttp://liftoff.msfc.nasa.gov/rsa/buran.html\n\nhttp://www.space.com/news/spacehistory/buran_auction_020509.html\n\nhttp://www.isro.org/
101598
Satellite that carries two or more different communications payloads; ie, C-band and Ku-band.
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The Satellite Situation Report from NASA's Goddard Space Flight Center. Dated September, 1997, the report counts almost 25,000 man-made objects: 8681 currently in orbit, and over 16,000 objects in a state of decay. Not every single satellite is included, since some are too small or too far away from home to be detected.\n\nRussia leads the list in decayed objects (with a debris count close to 10,000) and comes in a close second (3897) to the United States (4018) for currently orbiting objects. Keep in mind that these figures are already a few years old.
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There are Geostationary Satellites, which are what the GOES satellites are.  The US has 3 GOES satellites in orbit at a time, Goes East (12) and Goes West (10) as well Goes-11 which is orbiting but not in operation.  If there is a problem with Goes-10 or Goes-12 it would be used as a replacement.  There are other Geostationary Satellites used by other countries such as GMS (Japan) and METEOSTAT (Euro).\nThe other type of satellites are called Polar Orbiters, NOAA uses POES - Polar Operational Environmental Satellite.
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There are more than 800 active satellites currently in orbit. They represent four percent of the total number of objects currently cataloged by the U.S. space surveillance network; the rest includes abandoned satellites, spent rocket boosters, and other debris.
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What some experts say \n\nAbout 2500- http://home.brevardcc.edu/lipofskyb/satFAQfp.htm\n\n3,000 useful satellites and 6,000 pieces of space junk are orbiting Earth. (Worldbook)http://www.nasa.gov/worldbook/artificial_satellites_worldbook.html\n\n\nAsk an Astrophysicist-About 4000 launches- http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/980202e.html
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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
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Passive sonar systems are used primarily to detect noise from marine objects, such as submarines, ships, and marine animals like whales. Unlike active sonar, passive sonar does not emit its own signal, which is an advantage for military vessels that do not want to be found or for scientific missions that concentrate on “listening” to the ocean. Rather, it only detects sound waves coming towards it. Thus, passive sonar cannot measure the range of an object unless it is used in conjunction with other passive listening devices. Multiple passive sonar devices may allow for triangulation of the sound source. (Read more on passive ocean acoustic monitoring.)
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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.
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Maybe a geosynchronously orbiting satellite. Those are satellites that rotate with the Earth so it appears that they don't move from our perspective.\n\nObviously, anything else (including stars) would move as the night progressed.\n\nHope that helps.
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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
1105040
The nearest of wat u want can b got from google Earth.If u want live,real time video feeds u can try hacking into some remote sensing satellites
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Satellites are generally boosted into orbit using rockets (although several have been deployed from the payload bay of the space shuttle).  Satellites have any number of functions.  Some relay telephone and data traffic from one place on earth to another.  Others do the same for TV signals.  Others (working together) form the backbone of the Global Positioning Satellite system (GPS).  Still others take pictures of the earth for various purposes.\n\nHope that helps.
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Hobbyspace has details on amateur satellite projects.\n\nhttp://www.hobbyspace.com/SatBuilding/index.html\n\nLawrence Harris has written a satellite project handbook.\n\nhttp://www.amazon.com/gp/product/075062406X/103-9202786-2555003?v=glance&n=283155
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Google Earth is just about the best place to get Satelite images, they are usually pretty recent.\nYou will not find, anywhere, live satelite images, it is just too impractical.