N: 90 S: -90 E: 180 W: -180
Description
The Level-2 Aura Ozone Monitoring Instrument (OMI) Cloud Pressure and Fraction (O2-O2 Absorption) Product (OMCLDO2) collection version 4 is now available from NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for public access.The data was re-processed in December 2022 using collection 4 Level 1b data and the OMAERO processor version 4.0.0. Since then, this version is also being produced in the forward stream. This version of the product was publicly released in March 2026.
There are two Level-2 Aura OMI cloud products: OMCLDO2 and OMCLDRR. The OMCLDO2 product uses the O2-O2 absorption band at 477 nm method using the DOAS technique, whereas the OMCLDRR product uses the Rotational Raman Scattering method. This product contains cloud pressure, cloud fraction, slant column O2-O2, ozone, ring coefficients, uncertainties in derived parameters, terrain and geolocation information, solar and satellite viewing angles, and quality flags. The lead scientist for this product is Dr. Pepijn Veefkind.
The OMCLDO2 files are stored in NetCDF 4 format. Each file contains data from the day lit portion of an orbit (~53 minutes). There are approximately 14 orbits per day. The maximum file size for the OMCLDO2 data product is about 12 Mbytes.
Product Summary
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
Copy Citation
Documents
READ-ME
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
Get Help
QUESTIONS & SUPPORT
Get help with NASA Earth science data, datasets, tools, services, and metadata on the Earthdata Forum. Experienced staff in the data user community review and answer questions.
Get help on Earthdata ForumForum
Publications Citing This Dataset
Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor | Offset |
|---|---|---|---|---|---|---|---|
| PRODUCT/cloud_albedo_crb | PRODUCT/cloud_albedo_crb | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_albedo_crb_precision | PRODUCT/cloud_albedo_crb_precision | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_fraction_crb | PRODUCT/cloud_fraction_crb | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_fraction_crb_not_clipped | PRODUCT/cloud_fraction_crb_not_clipped | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_fraction_crb_precision | PRODUCT/cloud_fraction_crb_precision | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_height_crb | PRODUCT/cloud_height_crb | m | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_height_crb_precision | PRODUCT/cloud_height_crb_precision | m | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_pressure_crb | PRODUCT/cloud_pressure_crb | Pa | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_pressure_crb_not_clipped | PRODUCT/cloud_pressure_crb_not_clipped | Pa | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/cloud_pressure_crb_precision | PRODUCT/cloud_pressure_crb_precision | Pa | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/qa_value | PRODUCT/qa_value | 1 | uint8 | 255 | 0 to 100 | 0.0099999997764826 | 0 |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/apparent_scene_pressure | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/apparent_scene_pressure | Pa | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/apparent_scene_pressure_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/apparent_scene_pressure_precision | Pa | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/chi_square | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/chi_square | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/continuum_at_reference_wavelength | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/continuum_at_reference_wavelength | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/continuum_at_reference_wavelength_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/continuum_at_reference_wavelength_precision | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/nitrogendioxide_slant_column_density | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/nitrogendioxide_slant_column_density | mol m-2 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/nitrogendioxide_slant_column_density_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/nitrogendioxide_slant_column_density_precision | mol m-2 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/number_of_iterations | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/number_of_iterations | 1 | int32 | -2147483647 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/number_of_outliers | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/number_of_outliers | 1 | uint32 | 4294967295 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/number_of_spectral_points_in_retrieval | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/number_of_spectral_points_in_retrieval | N/A | uint16 | 65535 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/oxygen_oxygen_dimer_slant_column_density | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/oxygen_oxygen_dimer_slant_column_density | mol2 m-5 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/oxygen_oxygen_dimer_slant_column_density_correction_factor | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/oxygen_oxygen_dimer_slant_column_density_correction_factor | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/oxygen_oxygen_dimer_slant_column_density_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/oxygen_oxygen_dimer_slant_column_density_precision | mol2 m-5 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ozone_slant_column_density | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ozone_slant_column_density | mol m-2 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ozone_slant_column_density_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ozone_slant_column_density_precision | mol m-2 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/polynomial_coefficient | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/polynomial_coefficient | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/polynomial_coefficient_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/polynomial_coefficient_precision | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/processing_quality_error_flag | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/processing_quality_error_flag | N/A | uint8 | 255 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/processing_quality_flags | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/processing_quality_flags | N/A | uint32 | 4294967295 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ring_coefficient | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ring_coefficient | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ring_coefficient_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ring_coefficient_precision | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/root_mean_square_error_of_fit | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/root_mean_square_error_of_fit | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/scene_albedo | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/scene_albedo | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/scene_albedo_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/scene_albedo_precision | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/small_pixel_radiance_variance | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/small_pixel_radiance_variance | N/A | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_chi_square | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_chi_square | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_irradiance_chi_square | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_irradiance_chi_square | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_irradiance_offset | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_irradiance_offset | nm | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_irradiance_offset_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_irradiance_offset_precision | nm | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_offset | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_offset | nm | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_offset_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_offset_precision | nm | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_stretch | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_stretch | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_stretch_precision | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/wavelength_calibration_stretch_precision | 1 | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/xtrack_quality | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/xtrack_quality | N/A | uint16 | 65535 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/xtrack_quality_dynamic | PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/xtrack_quality_dynamic | N/A | uint8 | 255 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/GEOLOCATIONS/delta_time | PRODUCT/SUPPORT_DATA/GEOLOCATIONS/delta_time | ms | int32 | -2147483647 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/GEOLOCATIONS/geolocation_flags | PRODUCT/SUPPORT_DATA/GEOLOCATIONS/geolocation_flags | 1 | uint8 | 255 | N/A | N/A | N/A |
| PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude | PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude | degrees_north | float32 | 9.9692099683869E+36 | -90 to 90 | N/A | N/A |
| PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude_bounds | PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude_bounds | N/A | float32 | 9.9692099683869E+36 | N/A | N/A | N/A |