Calibration of instrument line shape of wide-swath greenhouse gas monitor instrument

Shizhao Li; Long Cheng; Hongchun Yang; Lei Ding

doi:10.1117/12.2580519

7 October 2020 Calibration of instrument line shape of wide-swath greenhouse gas monitor instrument

Shizhao Li, Long Cheng, Hongchun Yang, Lei Ding

Proceedings Volume 11571, Optics Frontier Online 2020: Optics Imaging and Display; 1157112 (2020) https://doi.org/10.1117/12.2580519
Event: Optics Frontiers Online 2020: Optics Imaging and Display (OFO-1), 2020, Shanghai, China

Abstract

The wide-swath greenhouse gas monitor is a hyperspectral resolution push-broom imaging spectrometer, which is used to detect global distribution of concentration of CO2 and CH4 in atmospheric greenhouse gases . Instrument Line Shape (ILS) is one of key parameters. Both radiometric calibration and spectral calibration need to convolve the reference spectrum with ILS. Therefore, the calibration accuracy of ILS directly affects radiometric accuracy and spectral accuracy. In order to accurately calibrate ILS, a test device with a tunable laser and integrating sphere was built; nine areas of the focal plane array detector were selected for the ILS calibration test, and the test results were Gaussian fitted. The results show that: taking the 1.61μm channel as an example, the accuracy of ILS is better than 1%; the spectral resolution, which is the full width at half maxima of ILS, is 0.07nm, which meets the need of retrieve applications.

Citation Download Citation

Shizhao Li, Long Cheng, Hongchun Yang, and Lei Ding "Calibration of instrument line shape of wide-swath greenhouse gas monitor instrument", Proc. SPIE 11571, Optics Frontier Online 2020: Optics Imaging and Display, 1157112 (7 October 2020); https://doi.org/10.1117/12.2580519

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