On-orbit spatial characterization of VIIRS using the Moon

Zhipeng (Ben) Wang; Xiaoxiong (Jack) Xiong

doi:10.1117/12.2024119

23 September 2013 On-orbit spatial characterization of VIIRS using the Moon

Zhipeng (Ben) Wang, Xiaoxiong (Jack) Xiong

Author Affiliations +

Proceedings Volume 8866, Earth Observing Systems XVIII; 88661W (2013) https://doi.org/10.1117/12.2024119
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The moon is a stable source for the on-orbit calibration of the space-borne sensors with regular lunar observation capability, such as MODIS on-board the Terra and Aqua satellites and VIIRS on-board the Suomi NPP satellite. The spectral bands of both sensors are located on multiple focal plane assemblies and spatially co-registered in both the along-scan and along-track directions. Any mis-registration, or the band-to-band registration (BBR) shift, can deteriorate the quality of the science products that are derived from the data of multiple spectral bands. In this paper, the VIIRS spatial performance, mainly focusing on its BBR, is characterized using its lunar observations via an algorithm developed and verified for MODIS. In this algorithm, the centroids of the lunar images of various bands are calculated and the BBR shift between bands is determined by differentiating these centroids. Results show that the on-orbit change of the BBR has been small for VIIRS reflective solar bands (RSB) since its launch in Oct. 2011. The modulation transfer function (MTF), a measure of the image sharpness of an optical system, is also derived for RSB from the same set of lunar images by an algorithm inherited from MODIS characterization. The VIIRS on-orbit MTF in the along-track direction is trended and shown to have been stable.

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Zhipeng (Ben) Wang and Xiaoxiong (Jack) Xiong "On-orbit spatial characterization of VIIRS using the Moon", Proc. SPIE 8866, Earth Observing Systems XVIII, 88661W (23 September 2013); https://doi.org/10.1117/12.2024119

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