{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,14]],"date-time":"2026-04-14T22:27:01Z","timestamp":1776205621679,"version":"3.50.1"},"reference-count":28,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2024,3,11]],"date-time":"2024-03-11T00:00:00Z","timestamp":1710115200000},"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>The Landsat-9 satellite, launched in September 2021, carries the Operational Land Imager-2 (OLI-2) as one of its payloads. This instrument is a clone of the Landsat-8 OLI and its mission is to continue the operational land imaging of the Landsat program. The OLI-2 instrument is not significantly different from OLI though the instrument-level pre-launch spectral characterization process was much improved. The focal plane modules used on OLI-2 were manufactured as spares for OLI and much of the spectral characterization of the components was performed for OLI. However, while the spectral response of the fully assembled OLI was characterized by a double monochromator system, the OLI-2 spectral characterization made use of the Goddard Laser for Absolute Measurement of Radiance (GLAMR). GLAMR is a system of tunable lasers that cover 350\u20132500 nm which are fiber-coupled to a 30 in integrating sphere permanently monitored by NIST-traceable radiometers. GLAMR allowed the spectral characterization of every detector of the OLI-2 focal plane in nominal imaging conditions. The spectral performance of the OLI-2 was, in general, much better than requirements. The final relative spectral responses (RSRs) represent the best characterization any Landsat instrument spectral response. This paper will cover the results of the spectral characterization from the component-level to the instrument-level of the Landsat-9 OLI-2.<\/jats:p>","DOI":"10.3390\/rs16060981","type":"journal-article","created":{"date-parts":[[2024,3,11]],"date-time":"2024-03-11T08:56:41Z","timestamp":1710147401000},"page":"981","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Prelaunch Spectral Characterization of the Operational Land Imager-2"],"prefix":"10.3390","volume":"16","author":[{"given":"Julia A.","family":"Barsi","sequence":"first","affiliation":[{"name":"NASA\/GSFC Biospheric Sciences Laboratory, Greenbelt, MD 20771, USA"}]},{"given":"Eric","family":"Donley","sequence":"additional","affiliation":[{"name":"Ball Aerospace and Technologies, Boulder, CO 80301, USA"}]},{"given":"Michelle","family":"Goldman","sequence":"additional","affiliation":[{"name":"Ball Aerospace and Technologies, Boulder, CO 80301, USA"}]},{"given":"Thomas","family":"Kampe","sequence":"additional","affiliation":[{"name":"Ball Aerospace and Technologies, Boulder, CO 80301, USA"}]},{"given":"Brian L.","family":"Markham","sequence":"additional","affiliation":[{"name":"NASA\/GSFC Biospheric Sciences Laboratory, Greenbelt, MD 20771, USA"}]},{"given":"Brendan","family":"McAndrew","sequence":"additional","affiliation":[{"name":"NASA\/GSFC Biospheric Sciences Laboratory, Greenbelt, MD 20771, USA"}]},{"given":"Joel","family":"McCorkel","sequence":"additional","affiliation":[{"name":"NASA\/GSFC Biospheric Sciences Laboratory, Greenbelt, MD 20771, USA"}]},{"given":"Eric","family":"Morland","sequence":"additional","affiliation":[{"name":"Ball Aerospace and Technologies, Boulder, CO 80301, USA"}]},{"given":"Jeffrey A.","family":"Pedelty","sequence":"additional","affiliation":[{"name":"Bay Engineering Innovations, Inc., Boulder, CO 80301, USA"}]},{"given":"James","family":"Pharr","sequence":"additional","affiliation":[{"name":"Northrup Grumman, Sterling, VA 20166, USA"}]},{"given":"Michael R.","family":"Rodriguez","sequence":"additional","affiliation":[{"name":"Hexagon US Federal, Chantilly, VA 20151, USA"}]},{"given":"Timothy M.","family":"Shuman","sequence":"additional","affiliation":[{"name":"Fibertek, Inc., Herndon, VA 20171, USA"}]},{"given":"Cameron","family":"Stutheit","sequence":"additional","affiliation":[{"name":"Ball Aerospace and Technologies, Boulder, CO 80301, USA"}]},{"given":"Andrei B.","family":"Sushkov","sequence":"additional","affiliation":[{"name":"Genesis Engineering Solutions, Inc., Lanham, MD 20706, USA"}]}],"member":"1968","published-online":{"date-parts":[[2024,3,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"10232","DOI":"10.3390\/rs61010232","article-title":"The Spectral Response of the Landsat-8 Operational Land Imager","volume":"6","author":"Barsi","year":"2014","journal-title":"Remote Sensing"},{"key":"ref_2","unstructured":"Toulemont, A., Olivier, M., Clerc, S., Bellouard, R., Reina, F., Gascon, F., Luce, J.-F., Mavrocordatos, C., and Boccia, V. (2021). Sensors, Systems, and Next-Generation Satellites XXV, SPIE."},{"key":"ref_3","first-page":"35","article-title":"The Operational Land Imager-2: Prelaunch spectral characterization","volume":"Volume 11127","author":"Barsi","year":"2019","journal-title":"Earth Observing Systems XXIV"},{"key":"ref_4","first-page":"27","article-title":"Landsat Program","volume":"Volume 1","author":"Liang","year":"2018","journal-title":"Comprehensive Remote Sensing"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"579","DOI":"10.1088\/0026-1394\/37\/5\/53","article-title":"NIST facility for Spectral Irradiance and Radiance Responsivity Calibrations with Uniform Sources","volume":"37","author":"Brown","year":"2000","journal-title":"Metrologia"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"10376","DOI":"10.1364\/AO.54.010376","article-title":"Comparison of two methodologies for calibrating satellite instruments in the visible and near-infrared","volume":"54","author":"Barnes","year":"2015","journal-title":"Appl. Opt. AO"},{"key":"ref_7","first-page":"9","article-title":"JPSS-1 VIIRS version 2 at-launch relative spectral response characterization and performance","volume":"Volume 9972","author":"Moeller","year":"2016","journal-title":"Earth Observing Systems XXI"},{"key":"ref_8","first-page":"46","article-title":"JPSS-2 VIIRS version 2 at-launch relative spectral response characterization","volume":"Volume 11127","author":"Moeller","year":"2019","journal-title":"Earth Observing Systems XXIV"},{"key":"ref_9","first-page":"65","article-title":"Radiometric calibration of G-LiHT\u2019s imaging spectrometer using GLAMR for satellite sensor intercalibration","volume":"Volume 9607","author":"Angal","year":"2015","journal-title":"Earth Observing Systems XX"},{"key":"ref_10","first-page":"400","article-title":"The JPSS-3 VIIRS version 2 at-launch relative spectral response characterization","volume":"Volume 12685","author":"Moeller","year":"2023","journal-title":"Earth Observing Systems XXVIII"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Kitchen-McKinley, S., McIntire, J., Choi, H., Meister, G., Barsi, J.A., McAndrew, B., Sushkov, A., Zukowski, B., Cook, W., and Gliese, U. (2023). PACE OCI Flight Unit Pre-Launch Spectral Characterization, IEEE.","DOI":"10.1109\/IGARSS52108.2023.10283202"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1007\/s11214-023-01009-2","article-title":"L\u2019Ralph: A Visible\/Infrared Spectral Imager for the Lucy Mission to the Trojans","volume":"219","author":"Reuter","year":"2023","journal-title":"Space Sci. Rev."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"McAndrew, B., McCorkel, J., Shuman, T., Zukowski, B., Traore, A., Rodriguez, M., Brown, S., and Woodward, J. (2018, January 13\u201318). Goddard Laser for Absolute Measurement of Radiance for Instrument Calibration in the Ultraviolet to Short Wave Infrared. Proceedings of the Conference on Lasers and Electro-Optics (2018), Paper AF3M.6, San Jose, CA, USA.","DOI":"10.1364\/CLEO_AT.2018.AF3M.6"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"S31","DOI":"10.1088\/0026-1394\/43\/2\/S07","article-title":"NIST reference cryogenic radiometer designed for versatile performance","volume":"43","author":"Houston","year":"2006","journal-title":"Metrologia"},{"key":"ref_15","unstructured":"(2023, December 28). NIST Report of Test Absolute Spectral Radiance Responsivity of the NASA GLAMR Si Radiometer LTD-11, S\/N 104, Available online: https:\/\/glamr.gsfc.nasa.gov\/sites\/default\/files\/GLAMR\/NIST_Uncertainty_Reports\/Report%20of%20Test%20SIRCUS%20FY2021%20GLAMR%20Si%20Radiance_final_signed.pdf."},{"key":"ref_16","unstructured":"(2023, December 28). NIST Report of Test Absolute Spectral Radiance Responsivity of the L-1 DET-8 #107 InGaAs Radiometer, Available online: https:\/\/glamr.gsfc.nasa.gov\/sites\/default\/files\/GLAMR\/NIST_Uncertainty_Reports\/2017\/Report%20of%20Test%20DET-8%20%23107%202017.pdf."},{"key":"ref_17","unstructured":"(2023, December 28). NIST Report of Test Absolute Spectral Radiance Responsivity of the NASA GLAMR exIGA Radiometer L-1 Model 8350, S\/N 002, Available online: https:\/\/glamr.gsfc.nasa.gov\/sites\/default\/files\/GLAMR\/NIST_Uncertainty_Reports\/2017\/Report%20of%20Test%20GLAMR%20exIGA_revised.pdf."},{"key":"ref_18","unstructured":"McAndrew, B., Barsi, J., Sushkov, A., and McCorkel, J. (2023, January 12). Radiometric Uncertainty Analysis of the GLAMR Calibration Facility. Proceedings of the Conference on Characterization and Radiometric Calibration for Remote Sensing (CALCON), Logan, UT, USA."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"091301","DOI":"10.1063\/1.5004810","article-title":"Invited Article: Advances in tunable laser-based radiometric calibration applications at the National Institute of Standards and Technology, USA","volume":"89","author":"Woodward","year":"2018","journal-title":"Rev. Sci. Instrum."},{"key":"ref_20","unstructured":"(2023, December 28). Labsphere Integrating Sphere Theory and Applications. Available online: https:\/\/www.labsphere.com\/wp-content\/uploads\/2021\/09\/Integrating-Sphere-Theory-and-Applications.pdf."},{"key":"ref_21","first-page":"108","article-title":"Time resolved irradiance of an integrating sphere illuminated by a mode-locked optical parametric oscillator","volume":"Volume 11127","author":"McAndrew","year":"2019","journal-title":"Earth Observing Systems XXIV"},{"key":"ref_22","unstructured":"Kvaran, G., Markham, B.L., and Zalewski, E. (2010, January 23). Overview of the radiometric calibration of the Operational Land Imager (OLI). Proceedings of the 19th Annual Conference on Characterization and Radiometric Calibration for Remote Sensing (CALCON), Logan, UT, USA."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"12275","DOI":"10.3390\/rs61212275","article-title":"Landsat-8 Operational Land Imager Radiometric Calibration and Stability","volume":"6","author":"Markham","year":"2014","journal-title":"Remote Sens."},{"key":"ref_24","unstructured":"Kvaran, G. (2019, January 18). Pre-launch Radiometric Characterization of the Operational Land Imager 2 (OLI 2). Proceedings of the Conference on Characterization and Radiometric Calibration for Remote Sensing (CALCON), Logan, UT, USA."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Levy, R., Barsi, J.A., Miller, J.A., Thome, K.J., Kvaran, G., Collins, S., and Marks, J. (Remote Sens., 2024). Landsat 9 transfer to orbit of pre-launch absolute calibration of Operational Land Imager (OLI), Remote Sens., in review.","DOI":"10.3390\/rs16081360"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Kaita, E., Markham, B., Haque, M.O., Dichmann, D., Gerace, A., Leigh, L., Good, S., Schmidt, M., and Crawford, C.J. (2022). Landsat 9 Cross Calibration Under-Fly of Landsat 8: Planning, and Execution. Remote Sens., 14.","DOI":"10.3390\/rs14215414"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Gross, G., Helder, D., Begeman, C., Leigh, L., Kaewmanee, M., and Shah, R. (2022). Initial Cross-Calibration of Landsat 8 and Landsat 9 Using the Simultaneous Underfly Event. Remote Sens., 14.","DOI":"10.3390\/rs14102418"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Gross, G., Helder, D., and Leigh, L. (2023). Extended Cross-Calibration Analysis Using Data from the Landsat 8 and 9 Underfly Event. 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