Publications

Xiao, HL; Ai, JJ; Yang, JH; Chen, K; Wang, XL; Gao, P; Han, ZY; Hu, XC; Qi, CL; Wang, L; Hu, XQ; Zhen, HB; Wang, MK (2025). Sampling Correction Approach With Interpolation Sliding Window for FY-3D/MERSI-II On-Orbit Calibration. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 63, 5401611.

Abstract
In order to ensure the accuracy and reliability of the observational data from the remote sensor during its on-orbit operation, a sampling correction approach with the interpolation sliding window (ISWSCA) is proposed on the basis of the quadratic fitting and interpolation correction. The ISWSCA mitigates the effects of the inhomogeneous distribution of the reflective properties on the lunar surface, significantly enhancing the sampling correction accuracy of the lunar observation data by incorporating a subpixel correction term. Based on the lunar observation data from the Fengyun-3D (FY-3D)/Medium Resolution Spectral Imager (MERSI)-II collected between 2018 and 2023, the feasibility of the ISWSCA is verified, and the ISWSCA improves the sampling correction accuracy by 2.13% and 5.25% during low and high lunar phases in comparison to the scaling method of the lunar full-disk irradiance (LFDISM), together with the correction accuracy improved by 1.37% and 6% in low and high spatial resolutions. The ISWSCA gives the long time series of the normalized calibration coefficient, together with the calibration uncertainty of the effective data being analyzed, and the results show that the on-orbit stability of the FY-3D satellite is excellent in the visible (VIS) and near-infrared (NIF) bands, with the attenuation rate below 1.29% and the calibration uncertainty within 2.11%. This study has an important significance for the on-orbit radiation calibration of the spatial remote sensor.

DOI:
10.1109/TGRS.2025.3540869

ISSN:
1558-0644