Research on analysis and suppression method of scene inhomogeneity of spaceborne imaging spectrometer

Ziying Liu; Shaofan Tang; Huan Li; Mingjie Zhang

doi:10.1117/12.2587115

12 March 2021 Research on analysis and suppression method of scene inhomogeneity of spaceborne imaging spectrometer

Ziying Liu, Shaofan Tang, Huan Li, Mingjie Zhang

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117634U (2021) https://doi.org/10.1117/12.2587115
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

Earth observation satellites are subject to rapid changes in ground albedo and atmospheric changes, resulting in uneven observation of the ground scene. This paper analyzes its influence on the spaceborne imaging spectrometer by parametrically simulating the non-uniformity of the space scene in the ALT and ACT directions, and introduces the design scheme of the mirror-based slit homogenizer and Offner beam splitter mount. The results show that when traditional slits and slit homogenizers are non-uniformly illuminated, the ISRF inherent distortion values of the spectral response function are 65.7% and 3.78%; the maximum curve of the Offner beam splitter is 0.257, which accounts for a single detector 0.8% of the pixel size, which improves the uneven illumination of the slit and the curved line of the spectrometer, effectively suppresses spectral distortion, improves the accuracy of hyperspectral data, and achieves the high-fidelity goal of the spaceborne imaging spectrometer.

Citation Download Citation

Ziying Liu, Shaofan Tang, Huan Li, and Mingjie Zhang "Research on analysis and suppression method of scene inhomogeneity of spaceborne imaging spectrometer", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117634U (12 March 2021); https://doi.org/10.1117/12.2587115

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available