Accession Number : ADA098636


Title :   Millimeter Wave Atmospheric Radiometry Observations.


Descriptive Note : Final rept, 1 Aug 78-16 Jun 80,


Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION


Personal Author(s) : Rainwater,J H ; Gallagher,J J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a098636.pdf


Report Date : 27 Mar 1981


Pagination or Media Count : 260


Abstract : Observations of atmospheric emission were performed at 94GHz during a period of inclement weather in February/March, 1980. The measurements were made at the Engineering Experiment Station at Georgia Tech and were limited to zenith observations. The radiometer which was employed has been described in previous reports. Theoretical aspects of fluctuation effects are described. The observations were performed for an integration time of 0.16 seconds so that the change of minimum temperature was in the range from approximately 0.8K to 1.2K. The observed sky emission resulted in brightness temperatures approximately an order of magnitude larger than the change of minimum temperature and exceeds the theoretical sky temperature values. Appendices give weather data and the data taken. A bibliography of pertinent references is presented as Appendix E. Conclusions and Recommendations (Section IV) are discussed. The data represents an initial effort in the observation of short-term fluctuation effects. Further work under a greater variety of weather conditions is needed. (Author)


Descriptors :   *RADIATION ABSORPTION , *ATMOSPHERIC REFRACTION , *ATMOSPHERES , *SCINTILLATION , GRAPHS , REFRACTIVE INDEX , MILLIMETER WAVES , POWER SPECTRA , RADIANCE , DATA REDUCTION , RADIOMETRY , ABSORPTION COEFFICIENTS , WATER VAPOR , SKY BRIGHTNESS


Subject Categories : Atmospheric Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE