https://s3-ap-southeast-2.amazonaws.com/ad-aspi/2021-05/Somebody%20might%20hear%20us_2.pdf?RXxmnXbZrRFS2cV10HZqpNMp0d.ofiCX
ASPI research article. A section on space linked comms is pretty relevant to what EOS does
See page 8. Extract as follows:
Space-based links as secure intermediariesSpace-based communications potentially provide a secure communication channel for terrestrial entities, provided that the links can be rendered uninterceptable. Until now, communication of information and control signals between spacecraft and the Earth has been via radio waves to and from ground stations. While the collimation of RF uplinks and downlinks is possible, interception is possible when collection systems are near enough to the uplink transmitter to collect energy from either the unavoidable side lobes of the main beam or when the collection system is able to be located within the same downlink footprint as the receiver. Replacing those RF links with laser signals of various wavelengths has the potential to simultaneously improve data rates and to secure the signals against interception.As well, there are significant advantages to using laser communication links between spacecraft. RF links necessarily limit bandwidth, and transmission losses over large distances limit the efficiency with which spacecraft with tight power budgets can communicate large volumes of data. Replacing those links with laser comm…..
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