{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:07:25Z","timestamp":1760144845110,"version":"build-2065373602"},"reference-count":16,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2024,5,22]],"date-time":"2024-05-22T00:00:00Z","timestamp":1716336000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>To provide ongoing continuity for the ocean, cloud, and aerosol science data records, NASA will launch the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission on 8 February 2024. The Ocean Color Instrument (OCI) is the primary sensor onboard PACE and 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. The OCI is a grating spectrometer with hyperspectral coverage from the ultraviolet (about 315 nm) to near-infrared (about 900 nm), with additional filtered channels in the short-wave infrared (940 nm\u20132260 nm). A rigorous ground test program was conducted to calibrate the instrument and ensure that the calibration can be transferred to on-orbit operations in order to achieve the high levels of accuracy demanded by the science community. Some calibration parameters, such as polarization sensitivity, can only be measured during pre-launch testing. Tests were performed to measure the Mueller matrix components necessary to correct polarized scenes encountered on orbit. Measurements covered all spectral bands and a series of telescope scan angles encompassing the expected on-orbit scan range. The sensitivity (linear diattenuation) was measured above 340 nm to be below 0.6%, except at wavelengths, and was characterized as better than 0.1%. Below 340 nm, the sensitivity can be much higher, but this is not expected to affect the science data significantly. These results indicate that any polarized scenes encountered on orbit can be corrected with a high degree of confidence.<\/jats:p>","DOI":"10.3390\/rs16111851","type":"journal-article","created":{"date-parts":[[2024,5,22]],"date-time":"2024-05-22T11:03:47Z","timestamp":1716375827000},"page":"1851","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Pre-Launch Assessment of PACE OCI\u2019s Polarization Sensitivity"],"prefix":"10.3390","volume":"16","author":[{"given":"Jeff","family":"McIntire","sequence":"first","affiliation":[{"name":"Science Systems and Applications Inc., Lanham, MD 20706, USA"}]},{"given":"Eugene","family":"Waluschka","sequence":"additional","affiliation":[{"name":"Stellar Solutions, Palo Alto, CA 94306, USA"}]},{"given":"Gerhard","family":"Meister","sequence":"additional","affiliation":[{"name":"NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA"}]},{"given":"Joseph","family":"Knuble","sequence":"additional","affiliation":[{"name":"NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA"}]},{"given":"William B.","family":"Cook","sequence":"additional","affiliation":[{"name":"NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1775","DOI":"10.1175\/BAMS-D-18-0056.1","article-title":"The Plankton, Aerosol, Cloud, ocean Ecosystem mission: Status, science, advances","volume":"100","author":"Werdell","year":"2019","journal-title":"Bull. Am. Meteorol. Soc."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Gorman, E.T., Kubalak, D.A., Patel, D., Mott, D.B., Meister, G., and Werdell, P.J. (2019, January 9\u201312). The NASA Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission: An emerging era of global, hyperspectral Earth system remote sensing. Proceedings of the Sensors, Systems, and Next-Generation Satellites XXIII, Strasbourg, France.","DOI":"10.1117\/12.2537146"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"875863","DOI":"10.3389\/frsen.2022.875863","article-title":"Test Results from the Prelaunch Characterization Campaign of the Engineering Test Unit of the Ocean Color Instrument of NASA\u2019s Plankton, Aerosol, Cloud and Ocean Ecosystem Mission","volume":"3","author":"Meister","year":"2022","journal-title":"Front. 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IGARSS, in press.","DOI":"10.1109\/IGARSS52108.2023.10281727"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"5524","DOI":"10.1364\/AO.44.005524","article-title":"Moderate-Resolution Imaging Spectroradiometer ocean color polarization correction","volume":"44","author":"Meister","year":"2005","journal-title":"Appl. Opt."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"McIntire, J.W., Waluschka, E., Meister, G., Knuble, J.J., and Cook, W.B. (2023, January 22\u201324). PACE OCI Polarization Sensitivity Based on Pre-launch Testing. Proceedings of the Earth Observing Systems XXVIII, San Diego, CA, USA.","DOI":"10.1117\/12.2677522"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Knuble, J.J., Meister, G., Chemerys, L.H., Choi, H., Collins, N.R., Eplee, R.E., Gliese, U., Gorman, E.T., Jepsen, K., and Kitchen-McKinley, S. (2023). Pre-launch Calibration Methods of OCI on the PACE mission. 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