MASTER: Geological Earth Mapping Experiment (GEMx), Summer 2025

This dataset includes Level 1B (L1B) data products from the MODIS/ASTER Airborne Simulator (MASTER) instrument. The spectral data were collected during 29 flights aboard a NASA ER-2 aircraft over California, Oregon, Nevada, Idaho, Utah, Arizona, New Mexico, and Texas, US, from 2025-05-23 to 2025-09-23. The Geological Earth Mapping Experiment (GEMx) research project used NASA's Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and MODIS/ASTER Airborne Simulator (MASTER) instruments to collect the measurements over the country's arid and semi-arid regions, including parts of California, Nevada, Arizona, and New Mexico, to map portions of southwest US for critical minerals. Data products include L1B georeferenced multispectral imagery of calibrated radiance in 50 bands covering wavelengths of 0.460 to 12.879 micrometers at approximately 50-meter spatial resolution. The L1B data is provided in HDF-4 and KMZ formats. In addition, the dataset includes the flight path, spectral band information, instrument configuration, ancillary notes, and summary information for each flight, and browse images derived from each L1B data file.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated November 5, 2026, 09:43 (UTC)
Created June 2, 2026, 23:43 (UTC)
Identifier 10.3334/ORNLDAAC/2472
Modified 2026-11-02T22:16:00Z
Theme {"Earth Science"}
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 3e7d950e-f2eb-444f-a784-d88f9c7ac30d
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
license https://www.usa.gov/government-works
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 87dbb710ad38bdbd4c4994edaf434f3958e5845db265c1e4e0c5c22c0cec1bec
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -120.23, "NorthBoundingCoordinate": 44.2169, "EastBoundingCoordinate": -103.701, "SouthBoundingCoordinate": 30.2242}]]
temporal 2025-05-23/2025-09-23