Research on on-Board Calibration System of Tiangong-2 Wide-Band Imaging Spectrometer
With the increasing requirements for quantification of in-orbit data products, the research of high-precision calibration system is of vital importance. Based on the research background of Tiangong-2 (TG-2) Wide-band imaging spectrometer payload, a complete scheme of full detection band radiometric and VNIR spectral calibration is proposed in this paper. A full FOV and aperture calibrator with internal reference radiation sources is designed, which consists of pointing mirror, halogen lamp with Pr-Nd glass and surface blackbody, and calibrates by rotating the mirror to point to the lamp and blackbody. The results of in-orbit calibration show that the scheme is reasonable and the calibration accuracy meets the requirements.
KeywordsTiangong-2 Imaging Spectrometer Spectral calibration Radiometric calibration Halogen lamp Surface blackbody
Thanks to China Manned Space Engineering for providing Wide-band Imaging Spectrometer data products of Tiangong-2.
- 1.Hongbo, W.: Research on In-orbit spectral calibration and polarization correction technology of visible/near-infrared push broom imaging spectrometer. Graduate School of Chinese Academy of Sciences (Shanghai Institute of Technical Physics) (2016)Google Scholar
- 2.Liang, Ma., Jun, Dian, Xiaoxian, Huang, et al.: Laboratory spectral calibration method of grating dispersive imaging spectrometer. Laser Optoelectron. Prog. 02, 198–202 (2013)Google Scholar