Process for data transmission by means of a geo-stationary satellite and at least one sub-satellite
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United States of America Patent
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Jan 15, 1991
Grant Date -
N/A
app pub date -
Oct 17, 1988
filing date -
Dec 23, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for data transmission uses a geo-stationary satellite and at least one sub-satellite, the sub-satellites being placed on lower orbits. For the transmission of news, at least two data streams are transmitted with different powers. The first data stream, with a higher power is used for linking with the geo-stationary satellite (S.sub.1) and the other data streams are transmitted by means of PN (pseudo-noise) sequences for linking with the sub-satellites (S.sub.2). Two data transmissions thus take place in the same carrier frequency, but involving different satellites that are both within the visibility range of an earth station. This type of transmission using additional data streams of information is suitable for controlling and/or regulating the exchange of news between satellite-satellite and/or earth-satellite-earth or for controlling or regulating the orbit of the satellites.
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