Aqua MODIS Level-1A Geolocation Data, version 1

Level 1A (L1A) data are reconstructed, unprocessed instrument data at full resolution, time-referenced, and annotated with ancillary information. This ancillary information can include radiometric and geometric calibration coefficients and georeferencing parameters (e.g., platform ephemeris). The Geolocation (GEO) collection provides terrain-corrected geolocation, viewing geometry, and navigation information required to accurately map satellite observations to Earth coordinates. The products include per-pixel latitude and longitude, surface height, solar and sensor zenith and azimuth angles, along with quality flags describing geolocation validity. In addition, scan-level timing, spacecraft attitude, and orbital navigation parameters are provided to support precise georeferencing and downstream processing. The GEO data are distributed in self-describing data formats and are intended to be used in conjunction with Level-1 radiance products to enable the generation and analysis of higher-level geophysical data products.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated September 8, 2026, 06:04 (UTC)
Created June 3, 2026, 00:45 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 882a06bb-b625-4717-a914-d8018e7d1170
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.5067/AQUA/MODIS/L1A/GEO/1
license https://www.usa.gov/government-works
modified 2026-08-31T22:16:03Z
programCode {026:000}
publisher NASA/GSFC/SED/ESD/GCDC/OB.DAAC;OBPG
resource-type Dataset
source_datajson_identifier true
source_hash 9e5b7a320d847f49cfe0a5b06eb3f2093cd8bb60e074c1e18c8dcd7ae685607d
source_schema_version 1.1
spatial ["CARTESIAN", [{"EastBoundingCoordinate": 180, "SouthBoundingCoordinate": -90, "WestBoundingCoordinate": -180, "NorthBoundingCoordinate": 90}]]
temporal 2002-07-04/2026-08-31
theme {"Earth Science"}