Experimental and analytical aspects of atmospheric EHF refractivity
Abstract
Absolute attenuation rates and refractivities due to water vapor and moist nitrogen were measured in the laboratory at 138 GHz, 300 K, pressures up to 1.5 atm, and relative humidities up to 100%. The computer-controlled measuring system comprises a millimeter wave resonance spectrometer (0.15 km effective path length) and a humidity simulator. The data are interpreted as a water vapor continuum spectrum consisting of two terms: strong self broadening (H2O-H2O) plus foreign gas broadening (H2O-N2) contributions. Implications of the results for modeling atmospheric EHF window transparencies and for revising established H2O line broadening theory are discussed.
- Publication:
-
ESA Special Publication
- Pub Date:
- April 1983
- Bibcode:
- 1983ESASP.194..477L
- Keywords:
-
- Atmospheric Attenuation;
- Atmospheric Refraction;
- Computer Techniques;
- Extremely High Frequencies;
- Refractivity;
- Atmospheric Temperature;
- Atmospheric Windows;
- Nitrogen;
- Spectrum Analysis;
- Water Vapor;
- Communications and Radar