Publications in Scientific Journals:
C. Su, D. Ryu, A. Western, W. Wagner:
"De-noising of passive and active microwave satellite soil moisture time series";
Geophysical Research Letters,
40
(2013),
3624
- 3630.
English abstract:
Satellite microwave retrievals and in situ measurements of surface soil moisture are usually compared in the time domain. This paper examines their differences in the conjugate frequency domain to develop a spectral description of the satellite data, suggesting the presence of stochastic random and systematic periodic errors. Based on a semiempirical model of the observed power spectral density, we describe systematic designs of causal and noncausal filters to remove these erroneous signals. The filters are applied to the retrievals from active and passive satellite sensors and evaluated against field data from the Murrumbidgee Basin, southeast Australia, to show substantive increase in linear correlations.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1002/grl.50695
Created from the Publication Database of the Vienna University of Technology.