Accession Number : AD0460971


Title :   INFRARED HORIZON SENSOR ACCURACY IN THE ATMOSPHERIC ABSORPTION BANDS


Corporate Author : AEROSPACE CORP EL SEGUNDO CA


Personal Author(s) : Earle, M D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/460971.pdf


Report Date : Jun 1964


Pagination or Media Count : 41


Abstract : An analysis has been made of atmospheric radiance data which were computed by the Weather Bureau based on a variety of atmospheric models. Narrow spectral regions, located within the carbon dioxide absorption band centered at 15 microns, have been considered. It is shown that a spectral band approximately 1.7 microns wide centered very close to the absorption band shows promise, when the data is properly processed, of providing 1 Sigma horizon sensor accuracies of about 0.05 degrees. A 'two color' technique involving the use of two spectral regions in the vicinity of the CO2 absorption band is discussed. The possibility of using the 28.6 to 40.0 micron spectral region within the broad rotational water vapor absorption band is also considered.


Descriptors :   *HORIZON SCANNERS , ATMOSPHERE MODELS , BAND SPECTRA , CARBON DIOXIDE , GERMANIUM , INFRARED DETECTORS , INFRARED RADIATION , INFRARED SPECTRA , WATER VAPOR


Subject Categories : Direction Finding


Distribution Statement : APPROVED FOR PUBLIC RELEASE