BRIEF RESEARCH REPORT article
Front. Remote Sens.
Sec. Atmospheric Remote Sensing
Volume 6 - 2025 | doi: 10.3389/frsen.2025.1623828
This article is part of the Research TopicEarth Observations from the Deep Space: 10 Years of the DSCOVR MissionView all 4 articles
Valida on of DSCOVR-EPIC Total Column O3 Retrievals Using Ground-based Pandora and Satellite Data from OMPS, OMI, and TEMPO
Provisionally accepted
- 1University of Maryland, Baltimore County, Baltimore, United States
- 2University of Maryland Baltimore County, Baltimore, United States
- 3University of Maryland Baltimore County, Baltimore Maryland, United States
- 4University of Maryland, College Park, United States
- 5SSAI, Lanham, United States
- 6Luft, Innsbruck, Austria
- 7Luftblick OG, Innsbruck, Austria
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The Earth Polychromatic Imaging Camera EPIC onboard the Deep Space Climate Observatory DSCOVR began obtaining fully illuminated Earth images on 6 July 2015 in 10 wavelength bands. The ultraviolet bands are, 317, 325, 340, and 388 nm used to retrieve total column ozone TCO at different local times of the day. On 28 June 2019, the spacecraft experienced a gyroscope failure. After recovery, the derived EPIC TCO values from 2021 to 2024 still agree well with those from the ground-based Pandora spectrometer instruments both on an hourly and weekly average basis. Hourly EPIC TCO shows more variability than the matched Pandora TCO but usually agrees within 2% and tracks the shape of the Pandora daily variation in most cases. Near-13:30 TCO data from the Ozone and Mapping Profiler Suit OMPS and the Ozone Monitoring Instrument OMI are also shown to frequently agree with time-matched Pandora and EPIC TCO values. In addition, comparisons are made with Version-3 hourly TCO retrievals from the US geostationary satellite TEMPO (Tropospheric Monitoring of Pollution) over two North American sites, Toronto, Canada, and Dearborn, Michigan. Long-term weekly Lowess average EPIC and Pandora TCO values agree to better than 2% as does the 3-week Lowess average of OMPS TCO. An analysis of Pandora TCO and 1 year of TEMPO V03 TCO suggests that noon TCO values are 2% to 5% larger than morning and afternoon values.
Keywords: Ozone, Satellite-data, timeseries, diurnal-variation, Validation
Received: 06 May 2025; Accepted: 04 Aug 2025.
Copyright: © 2025 Herman, Mao, Huang and Cede. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Jay Herman, University of Maryland, Baltimore County, Baltimore, United States
Liang Huang, SSAI, Lanham, United States
Alexander Cede, Luft, Innsbruck, Austria
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