This paper aims at providing a performances comparison of different High Data Rate Telemetry (HDR... more This paper aims at providing a performances comparison of different High Data Rate Telemetry (HDRT) solutions dedicated to high data volume downloading. Links in X and Ka bands are considered in order to fulfill the future missions needs such as Earth Observation. Considering the expected wide data amount to be downloaded for these missions embedded on satellites in Low Earth Orbits, LEO Direct To Earth solutions have been considered for this comparative study.
This paper aims at providing a feedback on the ISL performances of several missions with CNES imp... more This paper aims at providing a feedback on the ISL performances of several missions with CNES implication, among which the Rosetta and Philae mission, (ESA/DLR/CNES project) from the separation to the final lander transmission on the 67P/Churyumov-Gerasimenko comet nucleus. CNES specified and procured the equipment and was responsible of the ISL operations during the cruise and after separation. This paper presents an analysis of the Rosetta/Philae mission events on the basis of the available ISL telemetry and compares the results to the reconstructed trajectory. Information like the Philae rotation speed during bouncing or multipath interferences due to the local environment can thus be deduced. This Rosetta-Philae ISL equipment was already used by NASA for the Impactor-Solar Orbiter link of the Deep Impact mission which explored the comet 9P/Tempel in 2005. In the same way, CNES is involved in the Mascot ISL procurement, part of the Hayabusa-2 mission (JAXA/DLR/CNES). Equipment characteristics and first in-orbit performances measurement will be also developed in this paper. Finally, this paper will describe the CNES/ESA S-band TT&C equipment development for nanosatellite, used as input to start the development of next generation miniaturized ISL transponder. This equipment will be provided with meter-class ranging accuracy and multiple access techniques for a network of at least four nodes, like one orbiter and three landers. This development will be described in the paper, including the architecture at system and equipment levels, the specific used algorithms and typical link budgets for the case of an asteroid exploration mission.
This paper aims at providing a performances comparison of different High Data Rate Telemetry (HDR... more This paper aims at providing a performances comparison of different High Data Rate Telemetry (HDRT) solutions dedicated to high data volume downloading. Links in X and Ka bands are considered in order to fulfill the future missions needs such as Earth Observation. Considering the expected wide data amount to be downloaded for these missions embedded on satellites in Low Earth Orbits, LEO Direct To Earth solutions have been considered for this comparative study.
This paper aims at providing a feedback on the ISL performances of several missions with CNES imp... more This paper aims at providing a feedback on the ISL performances of several missions with CNES implication, among which the Rosetta and Philae mission, (ESA/DLR/CNES project) from the separation to the final lander transmission on the 67P/Churyumov-Gerasimenko comet nucleus. CNES specified and procured the equipment and was responsible of the ISL operations during the cruise and after separation. This paper presents an analysis of the Rosetta/Philae mission events on the basis of the available ISL telemetry and compares the results to the reconstructed trajectory. Information like the Philae rotation speed during bouncing or multipath interferences due to the local environment can thus be deduced. This Rosetta-Philae ISL equipment was already used by NASA for the Impactor-Solar Orbiter link of the Deep Impact mission which explored the comet 9P/Tempel in 2005. In the same way, CNES is involved in the Mascot ISL procurement, part of the Hayabusa-2 mission (JAXA/DLR/CNES). Equipment characteristics and first in-orbit performances measurement will be also developed in this paper. Finally, this paper will describe the CNES/ESA S-band TT&C equipment development for nanosatellite, used as input to start the development of next generation miniaturized ISL transponder. This equipment will be provided with meter-class ranging accuracy and multiple access techniques for a network of at least four nodes, like one orbiter and three landers. This development will be described in the paper, including the architecture at system and equipment levels, the specific used algorithms and typical link budgets for the case of an asteroid exploration mission.
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Papers by Olivier Bompis