Future EO missions with increasing spatial and spectral resolutions set requirements for high data rate and volume. The downlink capacity on the other hand is a limiting factor which can only be overcome by recently new technologies within the transmitter technology on one side and the data pre-processing and/or compression on-board on the other side. This advanced architecture for space-borne high speed payload data management subsystem (PDHS) is an important element to process more data with even smaller system to gain significant the overall system effectiveness. A former domain presented in this paper is the security of the payload data transmission, for commercial or GMES missions. The OHB-System experience gained from development of PDHS within three projects MSRS, KOMPSAT II and SAR-Lupe, form the baseline of our PDHS, that reaches several Gbit/s input rate and an output rate of 740 Mbit/s using dual polarisation techniques at X-Band at considerable low resources. The PDHS chain introduces the advantages of the IEEE 1355 space wire standard to provide scaleable redundancy and performance. The modules of the chain like on-board data processing (LEON processor) feature data compression, and truncation of data to the area of interest as well as data storage, data formatting (CCSDS), data encryption and downlink including the complete ground test equipment for verification of the PDHS.
High speed payload data handling with security for small earth observation missions
Schnelles Payload-Datenhandling mit Sicherheit für kleine Erdbeobachtungsmissionen
2007
4 Seiten, 4 Bilder, 1 Quelle
Conference paper
English
EARTH OBSERVATION PAYLOAD FOR SMALL SATELLITES
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