Accession Number:

ADA801371

Title:

An Infrared Cloud Indicator. 1 - Analysis of Infrared-Radiation Exchange with Tables and Chart for Calibration of the Cloud Indicator

Corporate Author:

NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS LANGLEY FIELD VA LANGLEY AERONAUTICAL LABORATORY

Report Date:

1945-11-01

Abstract:

An experimental model of a flight instrument that utilizes infrared radiations for detecting and indicating the location of clouds at night is briefly described. In order to determine the important parameters that contribute to the net exchange of radiation between the receiver of the cloud indicator and a cloud, a preliminary investigation is made of data in the scientific literature. The important parameters are then used in an analysis of the net exchange of radiation between the receiver of the cloud indicator and a cloud. As a result of the analysis, several tables and a chart have been devised, which make it practical to determine the magnitude of the net exchange of radiation for any particular atmosphere of known composition and distribution of temperature. The analysis and the resulting tables and chart take into consideration both water vapor and carbon dioxide and also the effect of the spectral absorption and emission of the optical system of the cloud indicator. The tables and the chart that resulted from the analysis were devised to provide a basis for extrapolating the results of ground observations to the range anticipated during flight use.

Descriptive Note:

Wartime rept.

Pages:

0078

Identifiers:

Communities Of Interest:

Modernization Areas:

Distribution Statement:

Approved for public release; distribution is unlimited.

File Size:

1.44MB