Publications

Chen, L; Xu, N; Hu, XQ; Lu, F; Zhang, P (2016). Study on Orbit Radiometric Calibration for FY-2 Visible Band based on Deep Convective Cloud. SPECTROSCOPY AND SPECTRAL ANALYSIS, 36(8), 2639-2645.

Abstract
A radiometric calibration method is described in this paper by using the deep convective clouds (Deep Convective Cloud, DCC) target for FY-2 visible channel. The deep convective cloud can be used as the radiometric calibration transfer object. The on-operational FY-2 radiometric calibration bias and the long-term degradation trend are evaluated according to the AQUA/MODIS instrument as the baseline of radiometric reference and DCC. The results show that: (1) There are different degrees of degradation for FY-2D, FY-2E and FY-2F, among which FY-2D has the biggest degradation due to the longest period. The annual rates of degradation for FY-2D and FY-2E are quite similar, 1. 67% and 1. 69% respectively, whereas the rate for FY-2F is lower with 0. 81%; (2) During the period of satellite eclipse, the instruments are not stable and this phenomenon could be detected by the DCC method; (3) There are bias in the the operational radiometric calibration between FY-2 and AQUA/MODIS, which is treated as the the radiometric reference usually. The radiometric calibration method based on DCC could work well in the radiometric calibration for FY-2. The results will help us to understand the degradation of instrument and for quantitative application usage.

DOI:
10.3964/j.issn.1000-0593(2016)08-2639-07

ISSN:
1000-0593