ALOS-2 Satellite Infrared Radiance Data For Fire Detection

Japanese ALOS-2 satellite data provides infrared radiance measurements from the Compact Infrared Camera (CIRC). The sensor is designed for forest fire detection, with a spatial resolution of 210 meters and a field of view of 128 km by 96 km. This Level 1 radiance dataset is produced by the Japan Aerospace Exploration Agency (JAXA) and was last updated in March 2023.

Use Cases

• Detect and monitor active forest fires by analyzing thermal radiance (W/um/sr/m^2) values in the infrared spectrum.
• Model land surface temperature changes using the athermal optics feature, which compensates for temperature-induced defocus.
• Map regional fire risk and hotspots across Southeast Asia by processing the 210-meter resolution GeoTIFF imagery.
• Calibrate fire detection algorithms using the radiometrically corrected radiance data derived from Level 0 sources.

Strengths

• Data is radiometrically corrected, providing derived radiance values in physical units (W/um/sr/m^2).
• Athermal optics design compensates for thermal defocus, improving data consistency across temperature ranges.
• Spatial resolution is specified as 210 meters with a defined field of view of 128 km by 96 km.

Limitations

• Specific sample size, temporal coverage, and geographic extent are not provided in the description.
• The dataset's utility is specialized for infrared thermal analysis, limiting broader spectral applications.

Provenance

Source

Japan Aerospace Exploration Agency (JAXA)

Collection Method

Data obtained by the Compact Infrared Camera (CIRC) onboard the ALOS-2 satellite and processed from Level 0 to Level 1 radiance.

Time Range

null

Freshness

Last updated in March 2023; update frequency is not specified.

Geography

Primary intended focus is Southeast Asia; exact spatial coverage is not specified.