what are the different types of satellite communication?
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.
296439
Phones, faxing, intercoms, interdepartmental letter carriers, transporters (last 2 if satellite fails) computers.
1160745
Satellite has some pricey up front costs but bandwidth can be similar to dsl. Before deciding check out cellular based broadband (often slow in rural areas), or microwave frequency internet providers such as BeamSpeed in Yuma AZ.
259857
GOES I think is active.  Active satellites are those that send beams down and gather reflected information to see what reflects.  Passive satellites measure only outgoing things.  Look up something about remote sensing and you will find examples.
655068
Actually most of todays satellites use dual polarization. Its not unlike vertical and horizontal polarization of basic radio antennae down here. Some of the earlier sat tv systems had a parobolic dish that would mechanically change polarization to get the other 12 of 24 channels on the satellite system. Multiplexing is another technique that provides more channels.
601886
It depends of the bandwidth capability of the satelite, and the bandwidth usage of each channel.
306787
The church I attend has the Directway satellite connection.  At the beginning there were more problems with connection.  Though the connection seems to be pretty consistently up now, it is just seemingly slow.\n\nThere is another satellite ISP now called Wild Blue based out of Denver, and they provide service throughout most of US.  Their website has the information on equipment, installation, and monthly pricing.\n\nhttp://www.wildblue.com
175401
Do you mean satellites like AO-51, which is used by amateur radio enthusiasts (Hams)?\n\nThe best source to start would be AMSAT, The Radio Amateur Satellite Corporation.  The link to their website is in "source(s)."
534759
Satellites. For cell phones, a radio signal is sent to a tower and then to a satellite and back down and to the other phone. For GPS, a signal is sent directly and so the user's location is more exact. For remote controls, the remote sends a signal to the object through the thing on the top and that is received by the sensor on the object.
489817
Some where around 300 ghz. Go to www.hamlink/freq.list.html
368047
Are you refering to communication to submarines.\n\nCheck out the ELF project, extremely low frequency telecommunications.
563221
Vonage\nComcast\nTimeWarner\n...etc.
340530
try this links\nhttp://www.satellites.co.uk/php-bin/forum/forumdisplay.php?f=16\nhttp://www.star-sat.com/indexflash.html
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.
273546
It depends on the type of system.  You have point to point, which is direct communications betweent two radio stations.  You have repeater operation, which allows two or more radio stations to communicate with each other through a third system, which relays transmissions over a single frequency pair.\n\nYou have conventional repeaters, or trunked repeaters.  Conventional systems work as mentioned above.  Trunked systems utilize several frequencies, controlled by computer.  Frequency pairs are assigned on a first come basis, and are rotated among all the radios on a system.\n\nRadio is not transmitted through a satellite, unless it *is* satellite radio.  Radio systems operate via a ground antenna system.
1052956
Three types of concatenation schemes are possible under SONET and SDH. These are:\n\n    \n *   Standard contiguous concatenation\n    \n *   Arbitrary contiguous concatenation\n    \n *   Virtual concatenation\n\n--------------------------------------------------------\n   1. Concatenation of three STS-1s within an STS-3c: The bytes from concatenated STS-1s shall be contiguous at the STS-3 level but shall not be contiguous when interleaved to higher-level signals. When STS-3c signals are multiplexed to a higher rate, each STS-3c shall be wholly contained within an STS-3 (i.e., occur only on tributary input boundaries 1–3, 4–6, 7–9, etc.). This rule does not apply to SDH.\n   \n\n   2. Concatenation of STS-1s within an STS-Nc (N = 3X, where X = 1, 4, 16, 64, or 256). Such concatenation shall treat STS-Nc signals as a single entity. The bytes from concatenated STS-1s shall be contiguous at the STS-N level, but shall not be contiguous when multiplexed on to higher-level signals. This also applies to SDH, where the SDH term for an STS-Nc is an AU-4-Xc where X = N/3.\n   \n   3.When the STS-Nc signals are multiplexed to a higher rate, these signals shall be wholly contained within STS-M boundaries, where M could be 3, 12, 48, 192, or 768, and its value must be the closest to, but greater than or equal to N (e.g., if N = 12, then the STS-12c must occur only on boundaries 1–12, 13–24, 25–36, etc.). In addition to being contained within STS-M boundaries, all STS-Nc signals must begin on STS-3 boundaries.\n\n\nGOOD LUCK
240753
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