PACE OCI polarization sensitivity based on pre-launch testing

Jeff McIntire; Eugene Waluschka; Gerhard Meister; Joseph Knuble; William B. Cook

doi:10.1117/12.2677522

4 October 2023 PACE OCI polarization sensitivity based on pre-launch testing

Jeff McIntire, Eugene Waluschka, Gerhard Meister, Joseph Knuble, William B. Cook

Proceedings Volume 12685, Earth Observing Systems XXVIII; 126850C (2023) https://doi.org/10.1117/12.2677522
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The Ocean Color Instrument (OCI) is a sensor on the upcoming Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in early 2024. OCI is a grating spectrometer with hyperspectral coverage from the ultraviolet (about 310 nm) to near-infrared (about 900 nm), with additional filtered channels in the short-wave infrared (940 nm – 2260 nm). This instrument will provide ocean color science data to continue the data sets collected by heritage sensors MODIS, SeaWiFs, and VIIRS, but with increased spectral coverage and improved accuracy. In order to achieve the high levels of accuracy demanded by the science community, a rigorous ground test program was conducted to calibrate the instrument and ensure that the calibration can be transferred to on-orbit operations. Some calibration parameters can only be measured during pre-launch testing; one such parameter is the polarization sensitivity. Polarization testing measured the Mueller matrix components needed to determine the polarization sensitivity for all spectral bands for a series of telescope scan angles covering the expected on-orbit scan range. Results indicate that the sensitivity is below 0.6 % except at the shortest wavelengths (less than 340 nm) and was characterized to better than 0.1 % above 340 nm. This indicates that any polarized scenes measured on orbit can be corrected for with a high degree of confidence.

Conference Presentation

Citation Download Citation

Jeff McIntire, Eugene Waluschka, Gerhard Meister, Joseph Knuble, and William B. Cook "PACE OCI polarization sensitivity based on pre-launch testing", Proc. SPIE 12685, Earth Observing Systems XXVIII, 126850C (4 October 2023); https://doi.org/10.1117/12.2677522

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