An update on the MODIS thermal emissive bands on-orbit performance

Carlos Perez Diaz; Tiejun Chang; Hanzhi Lin; Aisheng Wu; Gal Sarid; Xiaoxiong Xiong

doi:10.1117/12.2677456

4 October 2023 An update on the MODIS thermal emissive bands on-orbit performance

Carlos Perez Diaz, Tiejun Chang, Hanzhi Lin, Aisheng Wu, Gal Sarid, Xiaoxiong Xiong

Proceedings Volume 12685, Earth Observing Systems XXVIII; 126850P (2023) https://doi.org/10.1117/12.2677456
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The MODIS instrument onboard the Terra and Aqua satellites provides key measurements of various environmental parameters such as the land, ocean, and atmosphere. After over two decades of successful operations, both sensors experienced anomalies in the year 2022. In March, the Aqua spacecraft and, subsequently, the MODIS instrument entered a safe mode, and Terra MODIS experienced a Command Processor and Format Processor (CP/FP) reset. Separately, the Terra constellation exit maneuver (CEM) was performed in October, which included the transition of the MODIS instrument into a safe configuration as well. While MODIS has 16 infrared channels referred to as the thermal emissive bands (TEB), only the longwave infrared bands (27-30) were significantly impacted due to an increase in electronic crosstalk contamination after the Aqua MODIS sensor entered into safe mode. Crosstalk corrections have been applied to these bands to maintain the Level 1B product quality. Although to a lesser extent, the same MODIS bands were affected due to a slight increase in electronic crosstalk contamination after the Terra CEM was completed. Lastly, the Terra MODIS CP/FP reset had an effect on the digital output that transferred onto its photovoltaic bands due to their calibration algorithm. This paper presents the impacts of these events on the instruments’ TEB performance, and the subsequent changes made to their respective calibration algorithms.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Carlos Perez Diaz, Tiejun Chang, Hanzhi Lin, Aisheng Wu, Gal Sarid, and Xiaoxiong Xiong "An update on the MODIS thermal emissive bands on-orbit performance", Proc. SPIE 12685, Earth Observing Systems XXVIII, 126850P (4 October 2023); https://doi.org/10.1117/12.2677456

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