Inter-Band Radiometric Comparison and Calibration of ASTER Visible and Near-Infrared Bands

Remote Sensing

Kenta Obata¹  Satoshi Tsuchida²  Koki Iwao²  Jose Moreno²  Richard Müller² 

[1] National Institute of Advanced Industrial Science and Technology (AIST), Geological Survey of Japan, the Research Institute of Geology and Geoinformation, Central 7, Higashi 1-1-1, Tsukuba, Ibaraki 305-8567, Japan;

关键词: ASTER;    VNIR band;    inter-band radiometric consistency;    inter-band radiometric calibration;    band translation;    soil line;   

DOI  :  10.3390/rs71115140

来源: mdpi

【 摘 要 】

The present study evaluates inter-band radiometric consistency across the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) visible and near-infrared (VNIR) bands and develops an inter-band calibration algorithm to improve radiometric consistency. Inter-band radiometric comparison of current ASTER data shows a root mean square error (RMSE) of 3.8%–5.7% among radiance outputs of spectral bands due primarily to differences between calibration strategies of the NIR band for nadir-looking (Band 3N) and the other two bands (green and red bands, corresponding to Bands 1 and 2). An algorithm for radiometric calibration of Bands 2 and 3N with reference to Band 1 is developed based on the band translation technique and is used to obtain new radiometric calibration coefficients (RCCs) for sensor sensitivity degradation. The systematic errors between radiance outputs are decreased by applying the derived RCCs, which result in reducing the RMSE from 3.8%–5.7% to 2.2%–2.9%. The remaining errors are approximately equal to or smaller than the intrinsic uncertainties of inter-band calibration derived by sensitivity analysis. Improvement of the radiometric consistency would increase the accuracy of band algebra (e.g., vegetation indices) and its application. The algorithm can be used to evaluate inter-band radiometric consistency, as well as for the calibration of other sensors.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.