Data handling for EO-missions with high data rates requiring low resources

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Data handling for EO-missions with high data rates requiring low resources

Penne, Boris / Tobehn, Carsten / Rathje, R. / Michalik, H.

High spatial or spectral resolution optical or SAR Earth observation missions set requirements for high data rate and volume. The limited downlink bandwidth on the other hand can 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 spaceborne high speed payload data handling system (PDHS) is an important element to process more data with even smaller system to gain significant the overall system effectiveness. The PDHS chain introduces the advantages of channel link and IEEE 1355 space wire standards to provide scaleable redundancy and performance. The modules of the chain like on-board data processing (LEON processor) feature data pre-processing, compression, and truncation of data to the area of interest as well as data storage, data formatting (CCSDS), data encryption and downlink. The system comprises also the complete ground test equipment for verification of the PDHS as stand-alone units, at subsystem level and for complete system tests during satellite AIV. The OHB-System experience gained from development of PDHS within three projects MSRS, KOMPSAT II and SAR-Lupe, form the baseline of the PDHS, that reaches several Gbit/s input rate and an output rate of about 500 up to 1000 Mbit/s using dual polarisation techniques at X-Band at considerable low resources.