Using lunar observations to assess Terra MODIS thermal emissive bands calibration

Xiaoxiong Xiong; Hongda Chen

doi:10.1117/12.859088

27 August 2010 Using lunar observations to assess Terra MODIS thermal emissive bands calibration

Xiaoxiong Xiong, Hongda Chen

Proceedings Volume 7807, Earth Observing Systems XV; 78070I (2010) https://doi.org/10.1117/12.859088
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

MODIS collects data in both the reflected solar and thermal emissive regions using 36 spectral bands. The center wavelengths of these bands cover the3.7 to 14.24 micron region. In addition to using its on-board calibrators (OBC), which include a full aperture solar diffuser (SD) and a blackbody (BB), lunar observations have been scheduled on a regular basis to support both Terra and Aqua MODIS on-orbit calibration and characterization. This paper provides an overview of MODIS lunar observations and their applications for the reflective solar bands (RSB) and thermal emissive bands (TEB) with an emphasis on potential calibration improvements of MODIS band 21 at 3.96 microns. This spectral band has detectors set with low gains to enable fire detection. Methodologies are proposed and examined on the use of lunar observations for the band 21 calibration. Also presented in this paper are preliminary results derived from Terra MODIS lunar observations and remaining challenging issues.

Citation Download Citation

Xiaoxiong Xiong and Hongda Chen "Using lunar observations to assess Terra MODIS thermal emissive bands calibration", Proc. SPIE 7807, Earth Observing Systems XV, 78070I (27 August 2010); https://doi.org/10.1117/12.859088

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