Temperature evaluated mine position survey (temps) application of dual-band infrared methodology

Nancy Del Grande

doi:10.1117/12.2300255

29 January 1992 Temperature evaluated mine position survey (temps) application of dual-band infrared methodology

Nancy Del Grande

Proceedings Volume 2075, Passive Sensors; 20750R (1992) https://doi.org/10.1117/12.2300255
Event: Infrared Information Symposia, 1991, Ann Arbor, MI, United States

Abstract

We are investigating a temperature evaluated mine position survey (TEMPS) for remote detection of buried land mines. The TEMPS methodology uses two passive IR channels peaked near 5 and 10 microns to decouple temperature frbm emissivity related effects. The true (corrected) temperature maps show surface temperature variations of 0.2Ã‚Â°C. Corrections are made for air-path interference and reflected sky radiation. We exploit a property of Planck's radiation law which applies for small temperature excursions from 288 K. The radiant emittance is proportional to emissivity times absolute temperature to the power of (50/wavelength in microns). Our corrected temperature maps show patterns of conducted heat generated by buried objects which heat and cool at different rates than the surrounding materials. These patterns are distinguished from the patterns produced by surface objects. Their respective spatial, spectral, thermal, emissivity and temporal signatures differ. EG&G flew a dual-band IR scanner at 60 m for our demonstration of the TEMPS methodology at Nellis AFB. We detected simulated mine targets covered by 10 cm of dry sand. Optimization of this technology is expected to enhance the capabilities of the military community for standoff mine detection and other applications.

Citation Download Citation

Nancy Del Grande "Temperature evaluated mine position survey (temps) application of dual-band infrared methodology", Proc. SPIE 2075, Passive Sensors, 20750R (29 January 1992); https://doi.org/10.1117/12.2300255

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