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- Title
A Minimum Threshold for Wind Profiler Signal-to-Noise Ratios.
- Authors
Riddle, Anthony C.; Hartten, Leslie M.; Carter, David A.; Johnston, Paul E.; Williams, Christopher R.
- Abstract
One limiting factor in atmospheric radar observations is the inability to distinguish the often weak atmospheric signals from fluctuations of the noise. This study presents a minimum threshold of usability, SNRmin, for signal-to-noise ratios obtained from wind profiling radars. The basic form arises from theoretical considerations of radar noise; the final form includes empirical modifications based on radar observations. While SNRmin was originally developed using data from the 50-MHz profiler at Poker Flat, Alaska, it works well with data collected from a wide range of locations, frequencies, and parameter settings. It provides an objective criterion to accept or reject individual spectra, can be quickly applied to a large quantity of data, and has a false-alarm rate of approximately 0.1%. While this threshold's form depends on the methods used to calculate SNR and spectral moments, variations of the threshold could be developed for use with data processed by other methods.
- Subjects
ALASKA; RADAR meteorology; SIGNAL-to-noise ratio; WIND measurement -- Statistical methods; ATMOSPHERIC circulation; ATMOSPHERICS
- Publication
Journal of Atmospheric & Oceanic Technology, 2012, Vol 29, Issue 7, p889
- ISSN
0739-0572
- Publication type
Article
- DOI
10.1175/JTECH-D-11-00173.1