RELATIONSHIP BETWEEN SCINTILLATION AND RAIN ATTENUATION AT 19.77 GHZ

This paper reports a statistical relationship between 1-s averaged rai n attenuation (sigma, in decibels) and standard deviation to, in decib els) of simultaneous tropospheric scintillation in 1-s intervals, deri ved from high-resolution (50 samples/s) experimental 19.77 GHz attenua tion time series recorded at Spine d'Adda (45.4 degrees N) in a 30.6 d egrees slant path to satellite Olympus during an observation time of a pproximately 1 year. During rain the relationship between scintillatio n and rain attenuation, suitably separated, can be fit by the power la w sigma = 0.0398A(5/12) formula derivable from a turbulent-thin layer model.