Sharc, the atmospheric radiation and transmittance code for altitudes from 50 to 300 km

F. Iannarilli Jr.

doi:10.1117/12.2300209

29 January 1991 Sharc, the atmospheric radiation and transmittance code for altitudes from 50 to 300 km

F. Iannarilli Jr.

Proceedings Volume 1725, Targets, Backgrounds, and Discrimination; 172509 (1991) https://doi.org/10.1117/12.2300209
Event: Infrared Information Symposia, 1989, Ann Arbor, MI, United States

Abstract

The optical performance of near-horizon viewing infrared airborne sensors is affected by atmospheric variations along the line of sight, which are associated with (a) ambient atmospheric vertical structure and turbulence, and (b) the aircraft boundary layer. We have modeled systematic (non-fluctuating) errors and random variations in line-of-sight (LOS) angle and target intensity for several MWIR and LWIR wavelengths as a function of LOS elevation angle from a high altitude aircraft-borne sensor. A range of atmospheric temperature, density, and structure models was used to investigate the sensitivity of target scintillation, jitter angle, and image spread effects to altitude.

Citation Download Citation

F. Iannarilli Jr. "Sharc, the atmospheric radiation and transmittance code for altitudes from 50 to 300 km", Proc. SPIE 1725, Targets, Backgrounds, and Discrimination, 172509 (29 January 1991); https://doi.org/10.1117/12.2300209

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