It is already mentioned that ISS orbit the earth 15 times a day, how we design a dish network to stay communicate with it along its path? Are we build a dish in Atlantic Ocean too?
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1$\begingroup$ Check out TDRS... $\endgroup$– DJohnMCommented Nov 1, 2017 at 17:41
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$\begingroup$ they have a fixed a dish on earth, but a dynamic dish on ISS? $\endgroup$– Mohammad FajarCommented Nov 3, 2017 at 11:29
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2 Answers
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NASA communicates with the ISS through their Space Network, which consists of a constellation of satellites including ones in geosynchronous orbit, low earth satellites, and ground facilities that relay between NASA and the satellites. It's available 24/7 and allows constant communication with the ISS, including voice, telemetry, etc.
More at: https://www.nasa.gov/directorates/heo/scan/services/networks/sn
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While the Apollo-era space program had to rely on ground stations for communication, a network of geostationary satellites called TDRSS has been in use since the 1980s to provide continuous communication with spacecraft in orbit (as well as to the south pole!).
answered Nov 1, 2017 at 17:52
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$\begingroup$ but, how about this question: How NASA directed a rocket during launcing the first geostationer satellite, there is no other satellite for it to communicate? $\endgroup$ Commented Nov 1, 2017 at 18:22
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1$\begingroup$ Why would you need a satellite? We have had radios for a long time, long before there were satellites. $\endgroup$ Commented Nov 1, 2017 at 19:01
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$\begingroup$ I don't know exactly how TDRS-1 was guided into position, but almost certainly it was through some combination of communication from ground stations, ships at sea, and onboard automation. $\endgroup$ Commented Nov 1, 2017 at 19:24
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1$\begingroup$ TDRSS is not used for guidance. TDRS-1 was launched on a IUS which used inertial guidance. arc.aiaa.org/doi/abs/10.2514/6.1978-1292 globalsecurity.org/space/systems/ius.htm $\endgroup$ Commented Nov 1, 2017 at 19:44
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$\begingroup$ I mean, it is difficult to make a dish keep track with ISS, because ISS orbitting the earth 15 a day, so they must build a dish with specialized motor to track it. But why in ISS they can build that? I mean ISS must communicate with a network of Geostationary satellite, so its must be equipped with specialized dish with a motor so it can track where TDRS satellite located. $\endgroup$ Commented Nov 3, 2017 at 11:28