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- W126562992 abstract "The Huygens probe [1] carried two Frequency Modulation Continuous Wave (FMCW) radars during its successful descent through the atmosphere of Saturn's largest moon Titan [2,3]. Originally these radars were included primarily to provide real time altitude data only, and the original range specification of 10km (20km goal) dictated the design. They were early identified as potential sources of valuable scientific data on Titan's atmosphere and surface. However, improvements were only requested during the Qualification Model test campaign and so design changes had to be minimal. A dedicated Radar Altimeter Extension (RAE), interfacing to the radars, was developed as a part of the Huygens Atmospheric Structure Instrument (HASI) [4]. Altitude and topographic data were acquired by the Permittivity, Wave and Altimetry (PWA) experiment, a subunit of HASI. Radar altitude and AGC data was recorded via the probe housekeeping data. Terrestrial tests of the radars as well as the data acquired by the Huygens probe have identified a number of possible improvements that can significantly enhance the performance of this type of radar, both for the measurement of the probe altitude and for the acquisition of data on the atmosphere and surface of the target body. The basic design of the radar is introduced. Processing of data by RAE and PWA is explained. Data from terrestrial tests as well as data from Huygens are presented. Radar design features and their impact on the radar performance are discussed, and improvements of the radar design are suggested. The importance of complementary data sources for the interpretation of radar data is explained, and new operations modes for the full exploitation of the capabilities of FMCW radars on planetary probes are suggested." @default.
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- W126562992 date "2006-01-01" @default.
- W126562992 modified "2023-09-24" @default.
- W126562992 title "FMCW Radars for Entry Probes and Landers: Lessons learned from the Huygens Radar Altimeter" @default.
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