Using Dome Concordia to characterize the long-term stability of VIIRS thermal emissive bands

Amit Angal; Xiaoxiong Xiong; Ashish Shrestha; Aisheng Wu

doi:10.1117/12.2676768

4 October 2023 Using Dome Concordia to characterize the long-term stability of VIIRS thermal emissive bands

Amit Angal, Xiaoxiong Xiong, Ashish Shrestha, Aisheng Wu

Proceedings Volume 12685, Earth Observing Systems XXVIII; 126851C (2023) https://doi.org/10.1117/12.2676768
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The Visible Infrared Imaging Radiometer Suite (VIIRS) instruments aboard the Suomi NPP and NOAA-20 spacecraft have successfully provided Earth image products since 2011 and 2017, respectively. Maintaining accurate radiometric calibration and calibration consistency between the two sensors is a necessity for the continued quality of long-term data records. In this work, the use of frequent VIIRS measurements of brightness temperature over the area surrounding Dome Concordia (Dome C), Antarctica (75.1 °S, 123.4°E) to track the long-term stability of its thermal emissive bands (TEB) is presented. The extremely dry, cold, and rarefied atmosphere of the site makes it ideal to track and detect longterm changes in the TEB responses via analysis of near-nadir and off-nadir VIIRS overpasses in reference to the surface temperature measurements provided by an automated weather station (AWS). Multi-year Dome C measurements have been used to assess the stability of the VIIRS response-versus-scan-angle (RVS) of the half-angle-mirror (HAM), derived from prelaunch characterization, and detector differences at multiple scan angles. Also, included in this work is the RVS stability assessments using the Dome C overpasses. The methodology developed via this work will also be applied to the recently launched VIIRS instrument onboard the NOAA-21 satellite (previously JPSS-2) in the future.

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

Citation Download Citation

Amit Angal, Xiaoxiong Xiong, Ashish Shrestha, and Aisheng Wu "Using Dome Concordia to characterize the long-term stability of VIIRS thermal emissive bands", Proc. SPIE 12685, Earth Observing Systems XXVIII, 126851C (4 October 2023); https://doi.org/10.1117/12.2676768

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KEYWORDS

Domes

Equipment

Calibration

Thermal stability

MODIS

Temperature metrology

Emissivity

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