A flexible LEO satellite modem with Ka‐band RF frontend for a data relay satellite system

Summary From a geostationary Earth orbit (GEO) satellite's perspective, a low Earth orbit (LEO) satellite is visible on more than half of its orbit. Albeit the free‐space loss of an inter‐satellite link is much higher than the one of a direct ground link, considerable data rates and download vo...

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Bibliographic Details
Published in:International journal of satellite communications and networking 2020-05, Vol.38 (3), p.301-313
Main Authors: Katona, Zoltán, Gräßlin, Michael, Donner, Anton, Kranich, Norman, Brandt, Hartmut, Bischl, Hermann, Brück, Martin
Format: Article
Language:English
Subjects:
Computer architecture
data relay
digital signal processor (DSP)
Downloading
forward error correction (FEC)
GEO
Ground stations
intersatellite link (ISL)
Ka‐band
LEO
Low earth orbit satellites
Low earth orbits
modem
Modems
modulation
Relay satellites
Rocket launches
satellite
Satellite communications
Spacecraft
Telemetry
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Summary:Summary From a geostationary Earth orbit (GEO) satellite's perspective, a low Earth orbit (LEO) satellite is visible on more than half of its orbit. Albeit the free‐space loss of an inter‐satellite link is much higher than the one of a direct ground link, considerable data rates and download volumes can be achieved. In this paper, we describe the system architecture of an integrated approach for a data relay satellite system and the development of LEO satellite and ground station modems. The approach allows serving several small and inexpensive LEO satellites at the same time both with low rate telemetry/telecommand links and with high rate download of sensor data. The paper describes the system architecture of a geostationary data relay satellite system and the development of Ka‐band low‐Earth orbit satellite and ground station modems in hardware and software. Our approach allows serving several small and inexpensive low‐Earth orbit satellites at the same time, both with low rate telemetry/telecommand links and with high rate download of sensor data.
ISSN:1542-0973
1542-0981
DOI:10.1002/sat.1333