The information content of remote measurements of atmospheric temperature by satellite infra-red radiometry and optimum radiometer configurations
✍ Scribed by G. Peckham
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 839 KB
- Volume
- 100
- Category
- Article
- ISSN
- 0035-9009
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✦ Synopsis
Abstract
Infra‐red radiometry from an earth satellite is becoming an important technique for the determination of the three‐dimensional temperature structure of the atmosphere on a global scale. In this paper a quantitative expression for the information content of the data from a temperature sounding radiometer is derived. A simple model for the 15 μm CO~2~ absorption band is used to find radiometer configurations which give maximum information. The spectral bandwidths corresponding to these optimum configurations are considerably broader than those specified in the past for radiometers of this type. The technique of selective chopping in which the radiometer contains absorbing cells filled with CO~2~ is shown to make a significant increase in the information content.