SAGE III/ISS Solar Occultation Profiles for Atmospheric Chemistry
Updated 2mo ago
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Description
SAGE III/ISS Level 1B data provides monthly vertical transmission profiles of the stratosphere and mesosphere using solar occultation from the International Space Station. The instrument, launched in 2017, measures ozone, aerosols, nitrogen dioxide, nitrogen trioxide, and water vapor to monitor long-term atmospheric composition. This dataset continues a legacy of SAGE missions, with data historically used by the World Meteorological Organization for ozone depletion assessments.
Use Cases
Analyzing vertical ozone profiles in the stratosphere and mesosphere to track depletion and recovery.
Studying multi-wavelength aerosol extinction coefficients to understand atmospheric particle loading and type.
Monitoring long-term trends in nitrogen dioxide (NO2) and water vapor concentrations.
Using solar occultation transmission profiles to validate and calibrate other satellite or model data.
Strengths
Data includes a quality notice flagging specific compromised events (2024030913SS, 2024030915SS, 2024030917SS), demonstrating active curation.
Version 6.0 of the product includes improvements like filling transmission gaps, leading to several hundred more usable solar events.
The solar occultation technique provides high-vertical-resolution measurements of atmospheric composition.
Limitations
Key metadata like row count, column names, and exact file size are unavailable across all sources.
Sources conflict on the 'last updated' date, with one listing 2026-03-12 and another 2024-11-30.
The team recommends using version 6.0 data over this version 5.3 product for improved ozone, NO2, and aerosol data.
Provenance
Source
National Aeronautics and Space Administration (NASA)
Collection Method
Data gathered via solar occultation using the SAGE III instrument externally mounted on the International Space Station.
Time Range
Monthly profiles from at least 2017 (SAGE III/ISS launch) onward.
Freshness
2026-03-12 21:45:57.400723
Geography
Global coverage from the orbit of the International Space Station.
License is listed as 'other-license-specified' but details are not provided. The SAGE III/ISS team explicitly recommends against using data from three specific solar events due to line-of-sight blockage from a docked spacecraft.