Medium-scale surface temperature instrument: MUST

Dominique Dubet; Philippe Duthil; Olivier Saint-Pe; Robert Davancens

doi:10.1117/12.298120

31 December 1997 Medium-scale surface temperature instrument: MUST

Dominique Dubet, Philippe Duthil, Olivier Saint-Pe, Robert Davancens

Proceedings Volume 3221, Sensors, Systems, and Next-Generation Satellites; (1997) https://doi.org/10.1117/12.298120
Event: Aerospace Remote Sensing '97, 1997, London, United Kingdom

Abstract

An infrared sensor dedicated to surface temperature monitoring at medium scale (250 m) has been defined within the MUST mission study. This mission is dedicated to applications in agriculture, irrigation, hydrology, forest fires and environment. The work is performed within the frame of the European Commission (DG XII) contract. The study is led by Matra Marconi Space with CEMAGREF (F), the University of Valencia (Spain), the CNRS/CETP (F), INFOCARTO (Spain) and NRSC (UK) as partners. The definition of the mission and of the instrument has been performed in closed loop with the user community in order to match the instrument performance with the users' needs. A traditional scanner concept using cryogenically cooled photoconductor detectors and a more innovative push broom concept using linear arrays of uncooled microbolometers have been studied. Both concepts satisfy the users' needs and provide quite equivalent performance. The push broom option has been selected because it does not require any cooling, and is free of micro-vibrations. The concept is fully compatible with an implementation as a passenger on SPOT5 and is quite complementary of the vegetation instrument of SPOT5. The instrument offers a swath width of about 1400 km. It provides two spectral channels around 11 and 12 micrometer wavelength optimized to correct the atmospheric effects by the split window method. The NEDT is in the range of 0.3 K. This allows a final accuracy on land surface temperature of about 1.5 K after emissivity and atmosphere corrections which is fully adequate for the foreseen applications.

Citation Download Citation

Dominique Dubet, Philippe Duthil, Olivier Saint-Pe, and Robert Davancens "Medium-scale surface temperature instrument: MUST", Proc. SPIE 3221, Sensors, Systems, and Next-Generation Satellites, (31 December 1997); https://doi.org/10.1117/12.298120

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