Atmospheric IR Transmission Measurements in a Tropical Maritime Environment: Comparison with the LOWTRAN 6 Model
Abstract
Broadband IR transmission data measured at a coastal, tropical maritime site have been compared with LOWTRAN 6 model predictions. Transmittance data for a 7 km path plotted as a function of absolute humidity have been examined in six spectral regions from 1.5 to 12 micrometers. A significant discrepancy, which increases with water vapour content, has been found between the measured and predicted data for the 8 to 12 micrometer region. This discrepancy is believed to be due to errors in the laboratory-determined self- broadening coefficients of water continuum absorption. Reasonable agreement has been obtained in the 4.4 to 5.4 micrometer and the 3.5 to 4.0 micrometer regions, particularly for the former region when water continuum absorption is included in the LOWTRAN model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1985
- Accession Number
- ADA157920
Entities
People
- D. R. Cutten