> [!CAUTION] > **Caution:** This dataset has been superseded by [NASA/TEMPO/NO2_L3_V4_QA](https://developers.google.com/earth-engine/datasets/catalog/NASA_TEMPO_NO2_L3_V4_QA). ![NASA/TEMPO/NO2_L3_QA](https://developers.google.com/earth-engine/datasets/images/NASA/NASA_TEMPO_NO2_L3_QA_sample.png) Dataset Availability : 2023-08-01T00:00:00Z--2025-09-16T21:03:09Z Dataset Producer : [QA Filtered: Google and NASA ASDC](https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003) Tags : air-quality nasa nitrogen-dioxide pollution satellite-imagery tempo tropomi #### Description Nitrogen dioxide Level 3 files provide trace gas information on a regular grid covering the TEMPO field of regard for nominal TEMPO observations. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle. The rasters contain information on tropospheric, stratospheric and total nitrogen dioxide vertical columns, ancillary data used in air mass factor and stratospheric/tropospheric separation calculations, and retrieval quality flags. The re-gridding algorithm uses an area-weighted approach. The QA Filtered TEMPO NO2 L3 dataset is a quality-controlled version of the original data. It is generated by removing data points with high cloud cover (\>50%), extreme solar zenith angle (\>80 degrees), and main data quality (flag \> 0). - A version of this dataset without QA filters applied is available as [NASA/TEMPO/NO2_L3](https://developers.google.com/earth-engine/datasets/catalog/NASA_TEMPO_NO2_L3) - [General Documentation](https://asdc.larc.nasa.gov/documents/tempo/guide/TEMPO_Level-2-3_trace_gas_clouds_user_guide_V1.2.pdf) ### Bands **Bands** Pixel size: 2226 meters (all bands) | Name | Units | Pixel Size | Description | |---|---|---|---| | `weight` | km\^2 | 2226 meters | Sum of Level 2 pixel overlap areas. Represents the weighting factor for each grid cell, indicating the fraction of the grid cell area with valid data. | | `vertical_column_troposphere` | molecules/cm\^2 | 2226 meters | NO2 troposphere vertical column | | `vertical_column_troposphere_uncertainty` | molecules/cm\^2 | 2226 meters | NO2 troposphere vertical column uncertainty | | `vertical_column_stratosphere` | molecules/cm\^2 | 2226 meters | NO2 stratosphere vertical column uncertainty | | `main_data_quality_flag` | Dimensionless | 2226 meters | Main data quality flag which is always 0, indicating good quality data. | | `num_vertical_column_troposphere_samples` | Dimensionless | 2226 meters | Number of Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column. | | `min_vertical_column_troposphere_sample` | molecules/cm\^2 | 2226 meters | Smallest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column. | | `max_vertical_column_troposphere_sample` | molecules/cm\^2 | 2226 meters | Largest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column. | | `num_vertical_column_troposphere_uncertainty_samples` | Dimensionless | 2226 meters | Number of Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column uncertainty. | | `min_vertical_column_troposphere_uncertainty_sample` | molecules/cm\^2 | 2226 meters | Smallest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column uncertainty. | | `max_vertical_column_troposphere_uncertainty_sample` | molecules/cm\^2 | 2226 meters | Largest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column uncertainty. | | `num_vertical_column_stratosphere_samples` | Dimensionless | 2226 meters | Number of Level 2 pixel values contributing to Level 3 grid for the stratospheric vertical column. | | `min_vertical_column_stratosphere_sample` | molecules/cm\^2 | 2226 meters | Smallest Level 2 pixel values contributing to Level 3 grid for the stratospheric vertical column. | | `max_vertical_column_stratosphere_sample` | molecules/cm\^2 | 2226 meters | Largest Level 2 pixel values contributing to Level 3 grid for the stratospheric vertical column. | | `num_vertical_column_total_samples` | Dimensionless | 2226 meters | Number of Level 2 pixel values contributing to Level 3 grid for the total vertical column. | | `min_vertical_column_total_sample` | molecules/cm\^2 | 2226 meters | Smallest Level 2 pixel values contributing to Level 3 grid for the total vertical column. | | `max_vertical_column_total_sample` | molecules/cm\^2 | 2226 meters | Largest Level 2 pixel values contributing to Level 3 grid for the total vertical column. | | `solar_zenith_angle` | deg | 2226 meters | Data is filtered to include only observations with solar zenith angle less than or equal to 80 degrees. | | `viewing_zenith_angle` | deg | 2226 meters | Viewing zenith angle at pixel center | | `relative_azimuth_angle` | deg | 2226 meters | Relative azimuth angle at pixel center | | `vertical_column_total` | molecules/cm\^2 | 2226 meters | NO2 vertical column | | `vertical_column_total_uncertainty` | molecules/cm\^2 | 2226 meters | NO2 vertical column uncertainty | | `surface_pressure` | hPa | 2226 meters | Surface pressure | | `terrain_height` | m | 2226 meters | Terrain height | | `snow_ice_fraction` | Dimensionless | 2226 meters | Fraction of pixel area covered by snow and/or ice | | `fitted_slant_column` | molecules/cm\^2 | 2226 meters | NO2 fitted slant column | | `fitted_slant_column_uncertainty` | molecules/cm\^2 | 2226 meters | NO2 fitted slant column uncertainty | | `albedo` | Dimensionless | 2226 meters | Surface albedo | | `tropopause_pressure` | hPa | 2226 meters | Tropopause pressure | | `amf_total` | Dimensionless | 2226 meters | NO2 air mass factor | | `eff_cloud_fraction` | Dimensionless | 2226 meters | Data is filtered to include only observations with effective cloud fraction less than or equal to 50%. | | `amf_cloud_fraction` | Dimensionless | 2226 meters | Cloud radiance fraction for AMF calculation | | `amf_cloud_pressure` | hPa | 2226 meters | Cloud pressure for AMF calculation | | `amf_troposphere` | Dimensionless | 2226 meters | NO2 troposphere air mass factor | | `amf_stratosphere` | Dimensionless | 2226 meters | NO2 stratosphere air mass factor | ### Terms of Use **Terms of Use** This dataset is in the public domain and is available without restriction on use and distribution. See [NASA's Earth Science Data \& Information Policy](https://www.earthdata.nasa.gov/engage/open-data-services-and-software/data-and-information-policy) for additional information. ### Citations Citations: - NASA/LARC/SD/ASDC. (n.d.). TEMPO gridded NO2 tropospheric and stratospheric columns V03 (PROVISIONAL) \[Data set\]. NASA Langley Atmospheric Science Data Center DAAC. Retrieved from https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003 ### DOIs - ### Explore with Earth Engine > [!NOTE] > **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine) ### Code Editor (JavaScript) ```javascript var collection = ee.ImageCollection('NASA/TEMPO/NO2_L3_QA') .filterDate('2024-04-01', '2024-04-05') var visParams = { min: 0, max: 1.5e16, bands: ['vertical_column_troposphere'], palette: [ '000080', '0000D9', '4000FF', '8000FF', '0080FF', '00D9FF', '80FFFF', 'FF8080', 'D90000', '800000' ] }; Map.setCenter(-95.06, 42.02, 3) Map.addLayer(collection, visParams, 'Tropospheric NO2') ``` [Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_TEMPO_NO2_L3_QA) [TEMPO gridded NO2 (QA filtered) tropospheric and stratospheric columns V03 \[deprecated\]](https://developers.google.com/earth-engine/datasets/catalog/NASA_TEMPO_NO2_L3_QA) Nitrogen dioxide Level 3 files provide trace gas information on a regular grid covering the TEMPO field of regard for nominal TEMPO observations. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle. The rasters contain information on tropospheric, stratospheric and ... NASA/TEMPO/NO2_L3_QA, air-quality,nasa,nitrogen-dioxide,pollution,satellite-imagery,tempo,tropomi 2023-08-01T00:00:00Z/2025-09-16T21:03:09Z -90 -180 90 180 Google Earth Engine https://developers.google.com/earth-engine/datasets - [https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003](https://doi.org/https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003) - [https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_TEMPO_NO2_L3_QA)