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Description

The TROPESS AIRS-Aqua and OMI-Aura L2 Ozone for Forward Stream, Standard Product contains the vertical distribution of the retrieved atmospheric state of ozone (O3), formal uncertainties, and diagnostic information measured by the AIRS instrument on the EOS Aqua satellite and the OMI instrument on the EOS Aura satellite. The forward stream standard product is global for the time period from 2021-02-01 to present. The NASA TRopospheric Ozone and Precursors from Earth System Sounding (TROPESS) project, uses an optimal estimation algorithm, known as the MUlti-SpEctra, MUlti-SpEcies, Multi-SEnsors (MUSES).

The data files are written in the netCDF version 4 file format, and each file contains one day of data. The data have a spatial resolution of 13 km x 24 km (OMI nadir FOV), and are reported at 26 vertical levels from the surface to 0.1 hPa. The principal investigator for the TROPESS project is Kevin W. Bowman.

Product Summary

Platforms
Aqua ,
Aura
Instruments
AIRS ,
OMI
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Geographic Region
GLOBAL ,
STRATOSPHERE ,
TROPOSPHERE
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2021-02-01 to Present
Data Partner
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Concept ID
C2041966555-GES_DISC
Data State
COMPLETE
Number of Files/Granules
1648
Processing Level
2
Published
Updated
Science Keywords
Atmospheric Ozone

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

Bowman, K. (2021). TROPESS AIRS-Aqua and OMI-Aura L2 Ozone for Forward Stream, Standard Product V1 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/V9HA0ZB6Y3UZ Date Accessed: 2025-12-13

Documents

USER'S GUIDE

READ-ME

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

GENERAL DOCUMENTATION

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
altitude altitude m float32 -999 N/A N/A
datetime_utc datetime_utc 1 int32 -999 N/A N/A
geolocation/airs_atrack geolocation/airs_atrack 1 int16 -999 N/A N/A
geolocation/airs_granule geolocation/airs_granule 1 int16 -999 N/A N/A
geolocation/airs_omi_granule geolocation/airs_omi_granule 1 int32 -999 N/A N/A
geolocation/airs_view_ang geolocation/airs_view_ang degree float32 -999 N/A N/A
geolocation/airs_xtrack geolocation/airs_xtrack 1 int16 -999 N/A N/A
geolocation/omi_atrack geolocation/omi_atrack 1 int16 -999 N/A N/A
geolocation/omi_view_ang geolocation/omi_view_ang degree float32 -999 N/A N/A
geolocation/omi_xtrack_uv1 geolocation/omi_xtrack_uv1 1 int16 -999 N/A N/A
geolocation/omi_xtrack_uv2 geolocation/omi_xtrack_uv2 1 int16 -999 N/A N/A
geophysical/average_cloud_eod geophysical/average_cloud_eod 1 float32 -999 N/A N/A
geophysical/cloud_top_pressure geophysical/cloud_top_pressure hPa float32 -999 N/A N/A
geophysical/day_night_flag geophysical/day_night_flag N/A int16 -999 N/A N/A
geophysical/land_flag geophysical/land_flag N/A int32 -999 N/A N/A
geophysical/surface_temperature geophysical/surface_temperature K float32 -999 N/A N/A
latitude latitude degrees_north float32 -999 N/A N/A
longitude longitude degrees_east float32 -999 N/A N/A
observation_ops/averaging_kernel observation_ops/averaging_kernel 1 float32 -999 N/A N/A
observation_ops/observation_error observation_ops/observation_error 1 float32 -999 N/A N/A
observation_ops/signal_dof observation_ops/signal_dof 1 float32 -999 N/A N/A
observation_ops/xa observation_ops/xa 1 float32 -999 N/A N/A
observation_ops/x_test observation_ops/x_test 1 float32 -999 N/A N/A
pressure pressure hPa float32 -999 N/A N/A
retrieval/air_density retrieval/air_density mol m-3 float32 -999 N/A N/A
retrieval/mw retrieval/mw m-6 float32 -999 N/A N/A
target_id target_id 1 int64 -999 N/A N/A
time time seconds since 1993-01-01 00:00:00 float64 -999 N/A N/A
x x 1 float32 -999 N/A N/A
year_fraction year_fraction year float64 -999 N/A N/A
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