EMIT L1B At-Sensor Radiance and Geolocation Data from ISS

EMIT L1B At-Sensor Calibrated Radiance and Geolocation Data provides calibrated radiance and observation information from the EMIT instrument aboard the International Space Station. The dataset consists of granules containing radiance measurements across 285 spectral bands (381-2493 nm) and associated observation data, delivered as NetCDF4 files with a 60-meter spatial resolution. It is produced by NASA and targets sunlit, arid dust source regions between 52° N and 52° S latitude.

Use Cases

• Analyzing surface mineralogy in arid regions using the 285-band spectral radiance measurements.
• Correcting and projecting raw sensor data using the geometric lookup tables (GLT), latitude, longitude, and elevation layers.
• Studying viewing and solar geometries for atmospheric correction models with data from the Observation file.
• Investigating dust source composition and distribution patterns across global sunlit regions.
• Integrating calibrated radiance data with corrected spacecraft attitude and ephemeris information for precise geolocation.

Strengths

• Provides high spectral resolution data with 285 bands at approximately 7.5 nm resolution.
• Offers a 60-meter spatial resolution for detailed surface analysis.
• Includes geometric lookup tables (GLT) and ancillary data (latitude, longitude, elevation) for accurate georeferencing.
• Data is collected from the International Space Station, providing a unique orbital perspective.

Limitations

• Spatial coverage is limited to sunlit regions between 52° N and 52° S latitude.
• A known data acquisition gap exists from September 13, 2022, through January 6, 2023, due to a power issue.
• Specific row counts, dataset size, and detailed column names are not provided across the sources.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Measured by the EMIT imaging spectrometer instrument installed on the International Space Station.

Time Range

Data collection began in 2022, with a noted operational gap from September 2022 to January 2023.

Freshness

2026-03-13 03:08:51.353789

Geography

Sunlit regions of interest between 52° N latitude and 52° S latitude, targeting Earth's arid dust source regions.