Electronic crosstalk characterization of Terra MODIS long wave infrared channels

作者: Kwofu Chiang , Aisheng Wu , Sriharsha Madhavan , Xiaoxiong Xiong , Junqiang Sun

DOI: 10.1117/12.2185960

关键词: WavelengthBlack-body radiationEnvironmental scienceInfraredElectronic circuitPhysical oceanographyNISTOpticsRemote sensingBlack bodySpectroradiometer

摘要: Terra (T) MODerate-resolution Imaging Spectroradiometer (MODIS), a heritage Earth observing sensor has completed 15 years of operation as December 18 2014. T-MODIS 36 spectral channels designed to monitor the land, ocean, and atmosphere. The long term climate data record from is an important dataset for global change monitoring. Sixteen fall in Mid (M) (3.7-4.5μm) Long (L) (6.7-14.1μm)Wave InfraRed (M/LWIR) wavelengths, which are also referred Thermal Emissive Bands (TEBs). To date TEBs have very satisfactory performance attributed scan-by-scan calibration using on-board BlackBody whose temperature traceable NIST standards. However, with aging instrument, it was observed 2010 onwards that Photo Voltaic LWIR (Bands 27-30) suffered significantly electronic crosstalk. This mainly due deterioration circuits relevant bands Focal Plane Array (FPA). In this paper, we report characterization crosstalk above-mentioned well characterized test site such Dome Concordia (C). Such can be used reduce effects when implemented future Level 1B reprocessing thereby increasing radiometric fidelity concerned bands.

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