Prelaunch radiometric calibration of the thermal response of the PACE Ocean Color Instrument

Robert E. Eplee Jr.; Gerhard Meister; Shihyan Lee; Kenneth J. Squire; Ulrik Gliese; Joseph J. Knuble; Deepak Patel

doi:10.1117/12.2677463

4 October 2023 Prelaunch radiometric calibration of the thermal response of the PACE Ocean Color Instrument

Robert E. Eplee Jr., Gerhard Meister, Shihyan Lee, Kenneth J. Squire, Ulrik Gliese, Joseph J. Knuble, Deepak Patel

Proceedings Volume 12685, Earth Observing Systems XXVIII; 1268509 (2023) https://doi.org/10.1117/12.2677463
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The NASA Plankton, Aerosol, Cloud, and ocean Ecosystem (PACE) mission Ocean Color Instrument Team has completed the prelaunch radiometric characterization of the thermal response of the Ocean Color Instrument (OCI). The radiometric performance of the ultraviolet to visible (UVVIS) and visible to near-infrared (VISNIR) grating spectrographs and the shortwave-infrared (SWIR) filter spectrograph of OCI were characterized during the thermal vacuum testing of the instrument conducted in September and October of 2022. The thermal characterization test program will be outlined, along with the derived radiometric dependencies on temperature. For the UVVIS and VISNIR spectrographs, the change in radiometric response with temperature is consistent with theoretical models of the measured detector performance and is on the order of 0.15% per °C. For the SWIR spectrograph, the change in radiometric response with temperature in on the order of 0.04% per °C. For the UVVIS spectrograph, uncertainties in the radiometric measurements as the detector temperatures varied by ∼10° C were less than 0.15% for wavelengths of 350 − 593 nm. For the VISNIR spectrograph, uncertainties were less than 0.11% for wavelengths of 625 − 867 nm. For the SWIR spectrograph, the typical uncertainties were less than 0.15% for all bands. Since the expected temperature range for the instrument on orbit is 0.5° C, OCI meets the design goals for upper limits on radiometric uncertainties due to thermal effects.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Robert E. Eplee Jr., Gerhard Meister, Shihyan Lee, Kenneth J. Squire, Ulrik Gliese, Joseph J. Knuble, and Deepak Patel "Prelaunch radiometric calibration of the thermal response of the PACE Ocean Color Instrument", Proc. SPIE 12685, Earth Observing Systems XXVIII, 1268509 (4 October 2023); https://doi.org/10.1117/12.2677463

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