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Remote Sens. 2016, 8(1), 77; doi:10.3390/rs8010077

An Investigation of a Novel Cross-Calibration Method of FY-3C/VIRR against NPP/VIIRS in the Dunhuang Test Site

Key Laboratory of Quantitative Remote Sensing Information Technology, Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China
These authors contributed equally to this work.
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Authors to whom correspondence should be addressed.
Academic Editors: Changyong Cao, Richard Müller and Prasad S. Thenkabail
Received: 30 November 2015 / Revised: 5 January 2016 / Accepted: 14 January 2016 / Published: 21 January 2016
(This article belongs to the Collection Visible Infrared Imaging Radiometers and Applications)
View Full-Text   |   Download PDF [2440 KB, uploaded 21 January 2016]   |  

Abstract

Radiometric cross-calibration of Earth observation sensors is an effective approach to evaluate instrument calibration performance, identify and diagnose calibration anomalies, and quantify the consistency of measurements from different sensors. In this study a novel cross-calibration method is proposed, taking into account the spectral and viewing angle differences adequately; the method is applied to the FY-3C/Visible Infrared Radiometer (VIRR), taking the Suomi National Polar-Orbiting Partnership (NPP)/Visible Infrared Imaging Radiometer Suite (VIIRS) as a reference. The results show that the relative difference between the two sets increases from January to May 2014, and becomes lower for the data on 24 July, 11 September, and 16 September, within approximately 10%. This phenomenon is caused by the updating of the calibration coefficients in the VIRR datasets with results from a vicarious method on June 2014. After performing an approximate estimation of the uncertainty, it is demonstrated that this calibration has a total uncertainty of 5.5%–6.0%, which is mainly from the uncertainty of the Bidirectional Reflectance Distribution Function model. View Full-Text
Keywords: cross-calibration; spectral adjustment; bidirectional reflectance distribution function model; FY-3C/VIRR; NPP/VIIRS cross-calibration; spectral adjustment; bidirectional reflectance distribution function model; FY-3C/VIRR; NPP/VIIRS
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gao, C.; Zhao, Y.; Li, C.; Ma, L.; Wang, N.; Qian, Y.; Ren, L. An Investigation of a Novel Cross-Calibration Method of FY-3C/VIRR against NPP/VIIRS in the Dunhuang Test Site. Remote Sens. 2016, 8, 77.

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