ESA's Envisat GOMOS instrument provides geolocated and calibrated atmospheric transmission spectra and photometer flux data. Each occultation event generates a file of approximately 1 MB. The dataset was last updated in April 2012.
Use Cases
- Analyzing transmission spectra to retrieve vertical profiles of atmospheric constituents like ozone and NO2.
- Studying atmospheric composition variability using geolocation data (elevation +62 to +68 deg, azimuth +90 to +190 deg).
- Utilizing calibrated photometer fluxes for aerosol and cloud detection in the occultation path.
- Assessing data covariance spectra to quantify uncertainty in Level 2 retrieval algorithms.
Strengths
- Data includes full transmission and covariance spectra required for Level 2 processing.
- Each geolocated occultation is a calibrated product, with file size around 1 MB per event.
Limitations
- Data is from 2012, making it temporally stale for analyzing recent atmospheric trends.
- Spatial coverage is limited to specific occultation geometries (elevation +62 to +68 deg, azimuth +90 to +190 deg).
Provenance
- Source
- European Space Agency (ESA) via NASA Earthdata.
- Collection Method
- Satellite remote sensing from the GOMOS instrument aboard the Envisat platform.
- Time Range
- null
- Freshness
- Last updated in 2012; no ongoing updates indicated.
- Geography
- Global coverage constrained to specific satellite occultation geometries.