Assessment and Correction of View Angle Dependent Radiometric Modulation due to Polarization for the Cross-Track Infrared Sounder (CrIS)

Author:

Taylor Joe K.1ORCID,Revercomb Henry E.1,Tobin David C.1ORCID,Knuteson Robert O.1,Loveless Michelle L.1ORCID,Malloy Rebecca2,Suwinski Lawrence2,Iturbide-Sanchez Flavio3ORCID,Chen Yong3ORCID,White Glen4,Predina Joe4,Johnson David G.5

Affiliation:

1. Space Science and Engineering Center, University of Wisconsin-Madison, Madison, WI 53706, USA

2. L3Harris Technologies Inc., Fort Wayne, IN 46818, USA

3. Center for Satellite Applications and Research, National Environmental Satellite Data and Information Service, National Oceanic and Atmospheric Administration, College Park, MD 20740, USA

4. Logistikos Engineering LLC, Fort Wayne, IN 46845, USA

5. Remote Sensing Branch, Engineering Directorate, NASA Langley Research Center, Hampton, VA 23681, USA

Abstract

The Cross-track Infrared Sounder (CrIS) is an infrared Fourier-transform spectrometer that measures the Earth’s infrared radiance at high spectral resolution and high accuracy. The potential for polarization errors contributing significantly to the radiometric uncertainty of infrared remote sounders has been well recognized and documented, particularly due to polarization-dependent scene select mirrors operated in conjunction with grating-based instruments. The issue is equally applicable to FTS-based sensors. While the CrIS sensor utilizes an unprotected gold scene select mirror which has extremely low polarization in the infrared and the angle of incidence at the mirror is maintained for all calibration and Earth scene views, the radiometric bias due to polarization effects was determined to be non-negligible for cold scenes. A model for the polarization-induced calibration bias and the associated correction is presented for the CrIS instrument, along with details of the model parameter determination, and the impact of the correction on the calibrated radiances for a range of scene temperatures and types.

Funder

National Oceanic and Atmospheric Administration Cooperative Institute

National Aeronautics and Space Administration

Publisher

MDPI AG

Subject

General Earth and Planetary Sciences

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Low-latency equal optical path difference sampling for multi-field VLWIR interference signals;Infrared Physics & Technology;2024-05

2. The Cross-track Infrared Sounder (CrIS) Overview and Validation;Reference Module in Earth Systems and Environmental Sciences;2024

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