{"accessLevel": "public", "bureauCode": ["020:00"], "contactPoint": {"fn": "Barron Henderson", "hasEmail": "mailto:henderson.barron@epa.gov"}, "description": "Abstract copied from manuscript July 21, 2025\n\nLaunched in April 2023, the Tropospheric Emissions: Monitoring of Pollution (TEMPO), instrument provides for the first time\nhourly measurements of atmospheric pollutants over most of North America at high spatial resolution (\u02dc 2 \u00d7 4.75 km2). This\nevaluation of TEMPO\u2019s first year demonstrates the capability of total formaldehyde column retrievals (\u03a9HCHO, version 3) at\ndifferent locations, seasons, and meteorological conditions. The \u03a9HCHO product is assessed using 36 ground-based Pandora\ndirect-sun measurements from Pandonia Global Network (PGN) as a reference dataset. The 36 PGN sites were chosen for\nconsistency in direct-sun and sky-scan measurement modes. In the first year of operation, TEMPO \u03a9HCHO exhibit moderate\nto strong agreement at PGN sites in both measurement modes (R2 = 0.63 to 0.85). TEMPO shows a small bias of -2 \u00b1 20% at\nlower \u03a9HCHO (< 1.0\u00d71016 molecule cm-2) and a larger underestimation of -22 \u00b1 5% at higher \u03a9HCHO (> 1.5\u00d71016 molecule\ncm-2). TEMPO clearly captures the seasonal variability of \u03a9HCHO, with summer values exceeding those in winter, spring,\nand fall by 62%, 45%, and 29%, respectively. TEMPO shows no consistent bias at any time of day with excellent agreement\nfor different meteorological conditions. For all hourly differences between TEMPO and Pandora, 96% fall within 1 \u00d7 1016\nmolecules cm-2. TEMPO provides almost 50% more days with at least one observation compared to observations only at 1 pm.\nThese findings confirm the high quality of TEMPO\u2019s \u03a9HCHO measurements under a wide variety of conditions and show great\npromise for future scientific applications. Portions of this dataset are inaccessible because: All publicly available. They can be accessed through the following means: Via links provided. Format: Data Availability Statement. All data are publicly available. The Pandora data is available at\r\nPGN website (https://www.pandonia-global-network.org). Pandora data was accessed through the\r\nEPA\u2019s RSIG tool (https://www.epa.gov/hesc/remote-sensing-information-gateway; last access\r\nApril 2025). The TEMPO Level 2, version 3 data is available at NASA Earthdata ASDC website\r\n545 (https://search.earthdata.nasa.gov/). The meteorological data is available at NOAA ISD Lite\r\ndatabase (ftp://ftp.ncdc.noaa.gov/pub/data/noaa/isd-lite/). The AERONET AOD data is available\r\nvia NASA GFSC website (https://aeronet.gsfc.nasa.gov/). \n\nThis dataset is associated with the following publication:\nRawat, P., K. Travis, B. Henderson, J. Crawford, L.M. Judd, M.A. Demetillo, T. Lee, D. Flittner, J. Szykman, L. Valin, A. Whitehill, E. Baumann, T. Hanisco, A. Pandey, G. Abad, C. Nowlan, X. Liu, and K. Chance. Spatiotemporal Assessment of the TEMPO Formaldehyde Column Retrieval Using the Pandonia Global Network.   JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES. American Geophysical Union, Washington, DC, USA, 131(2): e2025JD044788, (2026).", "distribution": [{"accessURL": "https://aeronet.gsfc.nasa.gov/", "title": "https://aeronet.gsfc.nasa.gov/"}, {"accessURL": "https://search.earthdata.nasa.gov/", "title": "https://search.earthdata.nasa.gov/"}, {"accessURL": "https://www.epa.gov/hesc/remote-sensing-information-gateway", "title": "https://www.epa.gov/hesc/remote-sensing-information-gateway"}, {"accessURL": "https://www.pandonia-global-network.org", "title": "https://www.pandonia-global-network.org"}], "identifier": "https://doi.org/10.23719/1532494", "keyword": ["Geostationary Satellite", "atmospheric chemistry", "column formaldehyde", "pandora"], "license": "https://pasteur.epa.gov/license/sciencehub-license.html", "modified": "2025-07-31", "programCode": ["020:000"], "publisher": {"name": "U.S. Environmental Protection Agency", "subOrganizationOf": {"name": "U.S. Government"}}, "references": ["https://doi.org/10.1029/2025jd044788"], "rights": null, "spatial": "-135.0,18.0,-55.0,55.0", "title": "Spatiotemporal Assessment of the TEMPO Formaldehyde Column Retrieval using the Pandonia Global Network"}