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Horizontal gradients in the wet path delay derived from four years of microwave radiometer data
Author(s) -
Gradinarsky Lubomir P.,
Elgered Gunnar
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011427
Subject(s) - microwave radiometer , radiometer , microwave , temperature gradient , geodesy , environmental science , remote sensing , geology , meteorology , physics , quantum mechanics
We have analyzed four years of inferred wet path delay data from a microwave radiometer operating at 21.0 and 31.4 GHz. We have applied a four parameter gradient model to the wet delays, using different lengths of the time series for the gradient estimation. The mean gradient, averaged over 15 to 1440 minutes, varies between 0.9 and 0.4 mm and has a preferred direction towards the north‐east. Increasing the averaging time causes the estimated gradient to decrease. The 15 minutes mean gradient is 1.3 mm for the summer months and 0.7 mm for the winter months. Structure function results are also presented.