document title / titre du document TRP W ORK PLAN ... - emits - ESA

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TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 TRP Reference: Title: T102-45ET Advanced SAR-Instrument based on Digital Beamforming Next generation high performance SAR systems will benefit from digital beamforming techniques to overcome limitations related with tolerance and temperature stability problems inherent with classical analogue implementations. Digital implementation of beamforming opens the door to new modes of operation such as scanning on receive, adaptive pattern nulling and multibeam capability. Major parts of this kind of radar electronics can be reused in other radar bands because it is inherently frequency independent. First ESA internal investigations have shown feasibility of such SAR front-ends in terms of processing speed and power consumption. New advanced analogue and digital semiconductor technologies (GaN, SiGe, deep sub-micron) meanwhile available or under development for ground based commercial telecom and military systems are beneficial for implementing such kind of system. The compatibility of these technologies with the environmental conditions in LEO applications has to be investigated. Digital implementation of beamforming would open the door to further optimisation of instrument architecture, making it possible to simplify the remaining analogue part of the system in terms of development and integration. The main objective of the study will be to elaborate the performance improvements and/or cost reductions expected from utilisation of digital beamforming and advanced technologies for next generation instruments, staggered in mid- and long-term time scale. The following work has to be performed in order to meet the objective: - Definition of key performance figures and functional requirements for next generation SAR systems for different applications. - Survey on advanced technologies available and under development suitable for SAR systems based on digital beamforming. - Instrument architecture trade-off and optimisation for taking maximum benefit from the identified digital implementation possibilities. - Establishment of a conceptual design together with estimate of power, mass and thermal figures, and assessment of performance. - Definition of technology roadmaps identifying development needs of critical parts for implementation of advanced instruments. - Outline of a Breadboard for the proof of critical elements as potential next step. Deliverables: - Technical note on technologies for advanced SAR - Technical note on advanced architectures - Technical note on implementation roadmaps Current TRL: TRL1 Target TRL: TRL2 Application Need/Date: TRL5/6 by 2013 Application/Mission: Advanced SAR Systems Contract Duration: 12 months SW Clause : - Dossier0 Ref.: T-7736 Consistency with Harmonisation Roadmap and Conclusions: N/A Page 13 of 227
TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 TRP Reference: T104-17EE Bio- & geo-physical retrieval algorithm definition for active remote sensing of land Title: surfaces at P- and L-band This project aims to define, demonstrate and assess algorithms for the retrieval of a set of bio- and geo-physical parameters from observations that include a strong contribution from L-band SAR. A set of bio- and geo-physical parameters will be selected, based on perceived scientific or operational need and on expected feasibility. These are expected to include (but not be limited to) forest and other vegetation biomass, soil moisture, snow water equivalent. Targets for operational effectiveness of retrieval algorithms shall be identified at the outset. The work will take advantage of previous research on the refinement of wave interaction models and descriptions of the natural surfaces and vegetation appropriate to these wavelengths. New and independent developments of interaction models are not expected. Here, state-of-the-art descriptions and interaction models are to be used to construct, refine and predict the robustness of quantitative retrieval algorithms. The project will require validation experiments to be analysed. These are expected to be based on P- and L-band airborne and, where possible, satellite datasets plus complementary remote sensing and other data or knowledge. In particular, data from recent ESA led airborne campaigns and from Japan’s ALOS satellite (PALSAR instrument) should be a significant input to the study. Although not the focus of work at this stage of maturity, initial consideration of assimilation into land surface process models would be encouraged as a theme setting the scene for future study activities. Deliverables: Prototype algorithm Current TRL: TRL1 Target TRL: TRL2 Application Need/Date: SW operational by 2009 Application/Mission: Biomass mission / Habitat Contract Duration: 18 months SW Clause : - Dossier0 Ref.: T-419 Consistency with Harmonisation Roadmap and Conclusions: Not directly linked to harmonised technology. Page 14 of 227
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