Data collected by NASA’s Tropospheric Emissions: Monitoring Pollution (TEMPO) instrument enable precision monitoring of air pollution across the U.S.
TEMPO Data Access and Tools
Tropospheric Emissions: Monitoring of Pollution (TEMPO) Version 04 (V04) Level 1, 2, and 3 standard data products began production on September 17, 2025. The previous TEMPO data version (V03) was released publicly on May 24, 2024, and covered the period from August 2, 2023, to September 16, 2025. All observations since the beginning of the mission are being reprocessed with V04 algorithms, with V04 products becoming publicly available as they are reprocessed. TEMPO V03 products reached provisional validation status as of December 9, 2024, per the TEMPO Validation plan.
TEMPO Near Real-Time (NRT) Version 02 (V02) Level 1, 2, and 3 data products were released publicly on September 17, 2025. TEMPO NRT data are produced using a fast version of the TEMPO baseline retrieval processor. The NRT processing optimizes radiance calibration, image navigation and registration, and cloud and trace gas retrievals for rapid processing, while ensuring that product quality is sufficient for most NRT applications. The NRT data are available on a 14-day rolling period.
User guides and algorithm theoretical basis documents (ATBDs) describing the data products in the V04 release are listed below. The TEMPO ozone profile ATBD is still being finalized and is available upon request by writing to the Atmospheric Sciences Data Center (ASDC).
For inquiries about this TEMPO data release, please post/view questions on Earthdata Forum.
Data Services
More information about TEMPO and the services the ASDC provides may be found in the TEMPO storymap.
Data User Guides and Technical Documents
Data User Guides
- Level 1 User Guide (PDF)
- Near Real-Time Data Products User Guide and ATBD Supplement (PDF)
- O3Prof Level 2 & 3 User Guide (PDF)
- O3Tot Level 2 & 3 User Guide (PDF)
- Trace Gas (NO2 & HCHO) & Cloud Level 2 & 3 User Guide (PDF)
Algorithm Theoretical Basis Documents (ATBD)
- Algorithm Theoretical Basis for Version 3 TEMPO Level 0-1 Processor (ATBD) (PDF)
- Algorithm Theoretical Basis for Version 3 TEMPO O2-O2 Cloud Product (ATBD) (PDF)
- TEMPO Formaldehyde Retrieval Algorithm Theoretical Basis Document (ATBD) (PDF)
- TEMPO Nitrogen Dioxide Retrieval Algorithm Theoretical Basis Document (ATBD) (PDF)
- TEMPO Ozone Profile Retrieval Algorithm Theoretical Basis Document (ATBD) (PDF)
Technical Documents
- O3TOT Level 2 & 3 Algorithm Description (PDF)
- Operations Log
- Commissioning Log
- Validation Plan (PDF)
- Level 2 Trace Gas Validation Assessment (PDF)
- For the current week's predicted overpass times at selected sites, see OverPass.
- TEMPO Radiance Twilight V04 Inventory Tables
Datasets
| Dataset Sort descending | Temporal Extent | Version | Data State | Processing Level | Data Format | Science Keywords |
|---|---|---|---|---|---|---|
| TEMPO cloud pressure and fraction (O2-O2 dimer) V02 (NRT) (PROVISIONAL) | 2025-09-17 to Present | V02 | ACTIVE | 2 | netCDF-4 | Cloud Top Pressure, Cloud Fraction |
| TEMPO cloud pressure and fraction (O2-O2 dimer) V03 (PROVISIONAL) | 2023-08-02 to 2025-09-16 | V03 | COMPLETE | 2 | netCDF-4 | Cloud Top Pressure, Cloud Fraction |
| TEMPO cloud pressure and fraction (O2-O2 dimer) V04 (PROVISIONAL) | 2023-08-02 to Present | V04 | ACTIVE | 2 | netCDF-4 | Cloud Top Pressure, Cloud Fraction |
| TEMPO dark exposure V03 (PROVISIONAL) | 2023-07-21 to 2025-11-27 | V03 | COMPLETE | 1A | NetCDF-4 | SENSOR COUNTS |
| TEMPO dark exposure V04 (PROVISIONAL) | 2023-07-21 to Present | V04 | ACTIVE | 1A | netCDF-4 | SENSOR COUNTS |
| TEMPO formaldehyde total column V02 (NRT) (PROVISIONAL) | 2025-09-17 to Present | V02 | ACTIVE | 2 | netCDF-4 | Formaldehyde |
| TEMPO formaldehyde total column V03 (PROVISIONAL) | 2023-08-02 to 2025-09-16 | V03 | COMPLETE | 2 | netCDF-4 | Volatile Organic Compounds, Formaldehyde |
| TEMPO formaldehyde total column V04 (PROVISIONAL) | 2023-08-02 to Present | V04 | ACTIVE | 2 | netCDF-4 | Volatile Organic Compounds, Formaldehyde |
| TEMPO geolocated Earth radiances twilight V03 (PROVISIONAL) | 2023-09-27 to 2025-11-28 | V03 | ACTIVE | 1B | NetCDF-4 | Visible Radiance, ULTRAVIOLET RADIANCE |
| TEMPO geolocated Earth radiances twilight V04 (PROVISIONAL) | 2023-09-27 to Present | V04 | ACTIVE | 1B | netCDF-4 | Atmospheric Radiation, Radiative Flux |
| TEMPO geolocated Earth radiances V02 (NRT) (PROVISIONAL) | 2025-09-17 to Present | V02 | ACTIVE | 1B | netCDF-4 | Atmospheric Radiation, Radiative Flux |
| TEMPO geolocated Earth radiances V03 (PROVISIONAL) | 2023-08-02 to 2025-09-16 | V03 | COMPLETE | 1B | NetCDF-4 | Atmospheric Radiation, Radiative Flux |
| TEMPO geolocated Earth radiances V04 (PROVISIONAL) | 2023-08-02 to Present | V04 | ACTIVE | 1B | netCDF-4 | Atmospheric Radiation, Radiative Flux |
| TEMPO gridded cloud fraction and pressure (O2-O2 dimer) V02 (NRT) (PROVISIONAL) | 2025-09-17 to Present | V02 | ACTIVE | 3 | netCDF-4 | Cloud Top Pressure, Cloud Fraction |
| TEMPO gridded cloud fraction and pressure (O2-O2 dimer) V03 (PROVISIONAL) | 2023-08-02 to 2025-09-16 | V03 | COMPLETE | 3 | netCDF-4 | Cloud Top Pressure, Cloud Fraction |
| TEMPO gridded cloud fraction and pressure (O2-O2 dimer) Version V04 (PROVISIONAL) | 2023-08-02 to Present | V04 | ACTIVE | 3 | netCDF-4 | Cloud Top Pressure, Cloud Fraction |
| TEMPO gridded formaldehyde total column V02 (NRT) (PROVISIONAL) | 2025-09-17 to Present | V02 | ACTIVE | 3 | netCDF-4 | Volatile Organic Compounds, Formaldehyde |
| TEMPO gridded formaldehyde total column V03 (PROVISIONAL) | 2023-08-02 to 2025-09-16 | V03 | COMPLETE | 3 | netCDF-4 | Volatile Organic Compounds, Formaldehyde |
| TEMPO gridded formaldehyde total column V04 (PROVISIONAL) | 2023-08-02 to Present | V04 | ACTIVE | 3 | netCDF-4 | Volatile Organic Compounds, Formaldehyde |
| TEMPO gridded NO2 tropospheric and stratospheric columns V02 (NRT) (PROVISIONAL) | 2025-09-17 to Present | V02 | ACTIVE | 3 | netCDF-4 | Nitrogen Dioxide, Nitrogen Oxides |
| TEMPO gridded NO2 tropospheric and stratospheric columns V03 (PROVISIONAL) | 2023-08-02 to 2025-09-16 | V03 | COMPLETE | 3 | netCDF-4 | Nitrogen Dioxide, Nitrogen Oxides |
| TEMPO gridded NO2 tropospheric and stratospheric columns V04 (PROVISIONAL) | 2023-08-02 to Present | V04 | ACTIVE | 3 | netCDF-4 | Nitrogen Dioxide, Nitrogen Oxides |
| TEMPO gridded ozone profile V04 (BETA) | 2023-08-02 to Present | V04 | ACTIVE | 3 | netCDF-4 | Atmospheric Ozone, Ozone Profiles |
| TEMPO gridded ozone total column V03 (PROVISIONAL) | 2023-08-02 to 2025-09-16 | V03 | COMPLETE | 3 | NetCDF-4 | Atmospheric Ozone |
| TEMPO gridded ozone total column V04 (PROVISIONAL) | 2023-08-02 to Present | V04 | ACTIVE | 3 | netCDF-4 | Atmospheric Ozone, UV Aerosol Index, Cloud Fraction |
TEMPO Data Tools
| Tool Sort descending | Description | Services | |
|---|---|---|---|
| earthaccess | earthaccess is a python library that enables authentication, search, and access for NASA Earth science data with just a few lines of code. | Access, Search and Discovery | |
| Earthdata GIS | Earthdata GIS is a resource for distributing cloud-native, GIS-ready NASA Earth science data and services, including over 200 raster and feature geospatial services as well as resources such as thematic applications and ArcGIS StoryMaps. | Search and Discovery, Access, Geoprocessing, Visualization, Analysis, Comparison, Monitoring Natural Events, Subsetting | |
| Earthdata Search | Earthdata Search enables data discovery, search, comparison, visualization, and access across NASA’s Earth science data holdings. | Search and Discovery, Access, Cataloging, Cloud Computing, Downloading | |
| NASA Harmony | Use NASA Harmony services to prepare analysis-ready data, reduce time-to-science, and apply spatial and temporal subsetting to reduce data volume. | Subsetting, Transformation | |
| OPeNDAP | OPeNDAP handles transport, translation, and subsetting of data residing in most Earth science data formats. | Downloading, Subsetting | |
| Panoply | Panoply is a cross-platform application that plots geo-referenced and other arrays from netCDF, HDF, GRIB, and other datasets. | Visualization, Customization, Reformatting, Subsetting, Comparison | |
| PO.DAAC Data Downloader and Subscriber | Continually download PO.DAAC data products from the cloud. | Downloading, Search and Discovery | |
| Worldview | Worldview offers the capability to interactively browse over 1,200 global, full-resolution satellite imagery layers and download the underlying data. | Analysis, Search and Discovery, Visualization, Access, Comparison, Monitoring Natural Events |
Frequently Asked Questions
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