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TROPOSPHERIC EMISSIONS: MONITORING OF POLLUTION (TEMPO) PROJECT Validation and Quality Assessment of Level-2 Trace Gas Products (NO2, HCHO, & O3)

Published by U.S. Environmental Protection Agency | U.S. Environmental Protection Agency | Catalog Last Checked: August 03, 2026 at 12:52 AM | Dataset Last Updated: August 29, 2025
The data supporting the findings of this validation report are derived from public domain resources including ground-based networks, atmospheric composition field campaigns, and satellite observations. The specific datasets are categorized as follows: 1. TEMPO Satellite Observations The TEMPO Level 1 (radiances) and Level 2 (trace gas columns) version 3 data products (NO₂, O₃, and HCHO) are available through the NASA Earthdata Search portal under the TEMPO project collection. 2. Validation Reference Data To assess retrieval accuracy, this report utilizes independent measurements from the following sources: Ground-Based Network Observations: • Pandonia Global Network (PGN): High-frequency direct-sun measurements from Pandora spectrometers serve as the primary validation standard. Available at pandonia-global-network.org. • FTIR Network (NDACC): High-resolution solar absorption spectra for trace gas profiles are sourced from the Network for the Detection of Atmospheric Composition Change (NDACC). North American site data are available via the NDACC Data Host Facility. • Brewer and Dobson Spectrometers: Total column ozone (O₃) validation relies on the global network of ultraviolet spectrophotometers. Data are available via the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) at woudc.org. • Intensive Field Campaign Datasets (Summer 2023): This report leverages synergistic observations from the AGES+ multi-agency initiative (AEROMMA, CUPIDS, GOTHAAM, and STAQS), providing high-resolution aircraft and ground measurements: • STAQS: Airborne remote sensing (GCAS) and ground-based lidar (TOLNet) data are archived at the NASA STAQS Data Archive. • AEROMMA: In situ trace gas and aerosol measurements from the NASA DC-8 are available at the NOAA CSL AEROMMA Data Archive. • CUPIDS: Boundary layer dynamics and transport data from the NOAA Twin Otter and ground sites are hosted at the NOAA CSL CUPIDS Archive. • Satellite & Model Datasets: • TROPOMI: Accessed through the Copernicus Data Space Ecosystem. • OMI: Accessed through the NASA Earthdata Search portal. • WRF-Chem Model: University of Wisconsin-Madison 4km retrospective chemistry and aerosol predictions are available via the NOAA CSL AEROMMA Data Archive. Portions of this dataset are inaccessible because: --. They can be accessed through the following means: --. Format: --

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "020:00"
]
contactPoint 
{
  "fn": "James Szykman",
  "hasEmail": "mailto:szykman.jim@epa.gov"
}
description The data supporting the findings of this validation report are derived from public domain resources including ground-based networks, atmospheric composition field campaigns, and satellite observations. The specific datasets are categorized as follows: 1. TEMPO Satellite Observations The TEMPO Level 1 (radiances) and Level 2 (trace gas columns) version 3 data products (NO₂, O₃, and HCHO) are available through the NASA Earthdata Search portal under the TEMPO project collection. 2. Validation Reference Data To assess retrieval accuracy, this report utilizes independent measurements from the following sources: Ground-Based Network Observations: • Pandonia Global Network (PGN): High-frequency direct-sun measurements from Pandora spectrometers serve as the primary validation standard. Available at pandonia-global-network.org. • FTIR Network (NDACC): High-resolution solar absorption spectra for trace gas profiles are sourced from the Network for the Detection of Atmospheric Composition Change (NDACC). North American site data are available via the NDACC Data Host Facility. • Brewer and Dobson Spectrometers: Total column ozone (O₃) validation relies on the global network of ultraviolet spectrophotometers. Data are available via the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) at woudc.org. • Intensive Field Campaign Datasets (Summer 2023): This report leverages synergistic observations from the AGES+ multi-agency initiative (AEROMMA, CUPIDS, GOTHAAM, and STAQS), providing high-resolution aircraft and ground measurements: • STAQS: Airborne remote sensing (GCAS) and ground-based lidar (TOLNet) data are archived at the NASA STAQS Data Archive. • AEROMMA: In situ trace gas and aerosol measurements from the NASA DC-8 are available at the NOAA CSL AEROMMA Data Archive. • CUPIDS: Boundary layer dynamics and transport data from the NOAA Twin Otter and ground sites are hosted at the NOAA CSL CUPIDS Archive. • Satellite & Model Datasets: • TROPOMI: Accessed through the Copernicus Data Space Ecosystem. • OMI: Accessed through the NASA Earthdata Search portal. • WRF-Chem Model: University of Wisconsin-Madison 4km retrospective chemistry and aerosol predictions are available via the NOAA CSL AEROMMA Data Archive. Portions of this dataset are inaccessible because: --. They can be accessed through the following means: --. Format: --
distribution 
[
  {
    "title": "https://csl.noaa.gov/projects/aeromma/data.html",
    "accessURL": "https://csl.noaa.gov/projects/aeromma/data.html"
  },
  {
    "title": "https://csl.noaa.gov/projects/cupids/",
    "accessURL": "https://csl.noaa.gov/projects/cupids/"
  },
  {
    "title": "https://dataspace.copernicus.eu/",
    "accessURL": "https://dataspace.copernicus.eu/"
  },
  {
    "title": "https://search.earthdata.nasa.gov/",
    "accessURL": "https://search.earthdata.nasa.gov/"
  },
  {
    "title": "https://woudc.org/en/",
    "accessURL": "https://woudc.org/en/"
  },
  {
    "title": "https://www-air.larc.nasa.gov/missions/staqs/",
    "accessURL": "https://www-air.larc.nasa.gov/missions/staqs/"
  },
  {
    "title": "https://www.pandonia-global-network.org/home/",
    "accessURL": "https://www.pandonia-global-network.org/home/"
  },
  {
    "title": "https://www2.acom.ucar.edu/irwg",
    "accessURL": "https://www2.acom.ucar.edu/irwg"
  }
]
identifier https://doi.org/10.23719/d-bgwt
keyword 
[
  "Data Validation",
  "Geostationary Satellite",
  "TEMPO",
  "formaldehyde columns",
  "nitrogen dioxide columns",
  "ozone columns"
]
license https://pasteur.epa.gov/license/sciencehub-license.html
modified 2025-08-29
programCode 
[
  "020:000"
]
publisher 
{
  "name": "U.S. Environmental Protection Agency",
  "subOrganizationOf": {
    "name": "U.S. Government"
  }
}
references 
null
rights 
null
title TROPOSPHERIC EMISSIONS: MONITORING OF POLLUTION (TEMPO) PROJECT Validation and Quality Assessment of Level-2 Trace Gas Products (NO2, HCHO, & O3)

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