RADIOMETRIC DATA GATHERING PROGRAM.
Abstract
The report gives the results of an L-Band (1420 mc) measurement program which was undertaken to establish the radiometric temperature of certain materials as a function of incidence angle, polarization, and environmental conditions. The materials tested were wood, asphalt, concrete, and sand. The results indicate that the values of radiometric temperature are a decreasing function of incidence angle as measured from the nadir for the sense of polarization with the Evector horizontal. The values for concrete range from about 171 K at 20 degrees from the nadir to 50 K at 70 degrees from the nadir, and the values for asphalt are 201 K to 45 K at the same points. Wood and sand lie in between these two values. The values obtained for other materials lie quite close to those of concrete at the low values of nadir angles, but diverge widely at the 70 degree nadir angle. Water on the surface of the materials has the effect of reducing the apparent temperature of the material, and snow has the effect of raising the apparent temperature. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1964
- Accession Number
- AD0437134