Analysis of VIIRS TEB noise using solar diffuser measurements

Taeyoung Choi; Changyong Cao; Fuzhong Weng

doi:10.1117/12.2188386

8 September 2015 Analysis of VIIRS TEB noise using solar diffuser measurements

Taeyoung Choi, Changyong Cao, Fuzhong Weng

Proceedings Volume 9607, Earth Observing Systems XX; 960723 (2015) https://doi.org/10.1117/12.2188386
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The Soumi-NPP Visible Infrared Imaging Radiometer Suite (VIIRS) was launched on October 28th, 2011 and its Sensor Data Record (SDR) product reached maturity status in March of 2014. Although the VIIRS SDR products are declared at the validated maturity level, there remain issues such as residual stripings in some thermal bands along with the scan direction. These horizontal striping issues in the Thermal Emissive Bands (TEB) were reflected in the sea surface temperature (SST) products. The observed striping magnitude can reach to 0.2 K, especially at the band M14 and M15. As an independent source of calibration, the Solar Diffuser (SD) is utilized in this study. The SD is originally designed for the Reflective Solar Band (RSB), however, it is assumed to be thermally stable at the time of SD observation. For each detector, a linear slope is developed by Integrated Calibration and Validation System (ICVS), which is applied on converting digital number (DN) to radiance unit. After the conversion, detector based noise analyses in VIIRS band M15 and M16 are performed on in-scan and scan-by-scan SD responses. Since SD radiance varies within an orbit, the noise calculation must be derived from the neighborhood Allan deviation. The noise derived Allan deviation shows that detector 1 and 2 in band M15 and detector 9 in band M16 have higher noise content compared to other detectors.

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Taeyoung Choi, Changyong Cao, and Fuzhong Weng "Analysis of VIIRS TEB noise using solar diffuser measurements", Proc. SPIE 9607, Earth Observing Systems XX, 960723 (8 September 2015); https://doi.org/10.1117/12.2188386

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KEYWORDS

Sensors

Calibration

Diffusers

Signal to noise ratio

Black bodies

Solids

Interference (communication)

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