Sticky Dialog Bar | Support | GIS Dictionary

A to Z GIS | Explore this related guide, featuring updated terms and graphics and developed in coordination with Esri’s GIS Dictionary team.

Learn more about A to Z GIS

GIS Dictionary

Browse dictionary

long wave infrared

URL copied Share URL
  1. [physics] Also known by the abbreviation LWIR or TIR. The band of the electromagnetic spectrum with wavelengths in the 8–14 mm range. This is the passive thermal infrared band (TIR), consisting completely of emitted thermal energy. For imaging, sensors can obtain a completely passive LWIR image of warm objects occurring naturally in a landscape without requiring illumination from the sun.

See also