An effect of receiver noise on the measurement of Doppler spectral parameters
Article first published online: 7 DEC 2012
This paper is not subject to U.S. copyright. Published in 1997 by the American Geophysical Union.
Volume 32, Issue 4, pages 1409–1423, July-August 1997
How to Cite
1997), An effect of receiver noise on the measurement of Doppler spectral parameters, Radio Sci., 32(4), 1409–1423, doi:10.1029/97RS00382.(
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 28 JAN 1997
- Manuscript Received: 26 JUL 1996
We consider the Doppler power spectra calculated from radar precipitation echos. It is shown that receiver noise can produce a spurious linear realtion between the spectral width and radar range. This effect occurs at all elevation angles and disappears when the effects of receiver noise are eliminated by means of a thresholding technique. A simple model explains why this effect occurs when the signal spectrum is sufficiently narrowband and the variation of radar reflectivity isnot too great over the range interval of interest. Examples are given from data taken with a coherent X-band radar.