Comparison of the 3 to 5 and 8 to 13 Micron Bands for Terrain Reconnaissance, and Optimization of Other Parameter Values.

by Lloyd Mundie

Purchase Print Copy

 FormatList Price Price
Add to Cart Paperback $20.00 $16.00 20% Web Discount

A comparison of the passive infrared reconnaissance performance of the mercury-doped germanium (Ge:Hg) detector, operating in the 8 to 13 micron atmospheric window, and the indium antimonide (InSb) detector, using the 3 to 5 micron window. The Ge:Hg signal-to-noise ratio is superior by a factor of 2.5 at close range to 8.4 through a mile of hot, humid atmosphere with targets at ambient temperature. It remains superior through useful atmospheric path lengths for targets up to 530 degrees K. This extra value is often lost because of the limited number of shades of gray available on photographic film. Some of the unused S/N is typically traded for increased resolution in detecting small warm targets, at the cost of lowered display of terrain background features. For good terrain registration and maximum detection of point targets, simultaneous use of high- and low-resolution detectors is suggested. 16 pp. Refs.

This report is part of the RAND Corporation Paper series. The paper was a product of the RAND Corporation from 1948 to 2003 that captured speeches, memorials, and derivative research, usually prepared on authors' own time and meant to be the scholarly or scientific contribution of individual authors to their professional fields. Papers were less formal than reports and did not require rigorous peer review.

Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit www.rand.org/about/principles.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.