Title :
Attenuation statistics at 20.6, 31.65 and 52.85 GHz derived from emission measurements by ground-based microwave radiometers
Author :
Fionda, E. ; Falls, M.J. ; Westwater, E.R.
Author_Institution :
Fondazione Ugo Bordoni, Rome, Italy
fDate :
2/1/1991 12:00:00 AM
Abstract :
Two seasons (December 1987 to February 1988 and July 1988 to September 1988) of thermal emission measurements, taken by a multichannel ground-based microwave radiometer, are used to derive single-station zenith attenuation statistics at 20.6 and 31.65 GHz. For the summer period, statistics are also derived at 52.85 GHz. In addition, data from two radiometers located 50 km apart are used to derive two-station attenuation diversity statistics at 20.6 and 31.65 GHz. The multichannel radiometer was operated at Denver, Colorado, USA and the dual-channel device was operated at Platteville, Colorado. The diversity statistics are presented by cumulative distributions and by bivariate frequency distributions. The frequency distributions are analysed when either one or both stations have liquid clouds.
Keywords :
attenuation measurement; electromagnetic wave absorption; radiometry; radiowave propagation; tropospheric electromagnetic wave propagation; 20.6 GHz; 31.65 GHz; 52.85 GHz; AD 1987 12 to 1988 02; AD 1988 07 to 09; Colorado; Denver; EHF; Platteville; SHF; United States; bivariate frequency distributions; cumulative distributions; ground-based microwave radiometers; liquid clouds; multichannel radiometer; single-station zenith attenuation statistics; summer period; thermal emission measurements; two-station attenuation diversity statistics; winter period;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
