🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: sci.math.stat
Article #597

Robust Spectral Estimation of Gappy Series

#597
From: rich
Date: Tue, 29 Sep 1992 23:41
32 lines
1377 bytes
I am trying to generate spectral estimates from time series which have
2 problems:

   1) dropouts, i.e. gaps in the time series (perhaps 20% of the values)
   2) error spikes (perhaps 2% of the values)

The time series is a geophysical one (i.e. reddish spectrum), with
perhaps a few small peaks (tides and what-not).

The standard window-fft-and-average techniques seem to be inadequate
for this - I can't think of a good way to handle the gaps (other than
ignoring them by removing them from the series), and the spikes tend to
give a lot of "white" energy.

Median filtering can get rid of some of the spikiness, but it does bad
things to some of the other parts of the signal.


Can anyone help me with some good references?


Email or post, I will summarize.




--
Rich Pawlowicz ----------------- INTERNET: rich@boreas.whoi.edu
Woods Hole Oceanographic Institution
"Home of the 99 cent squid burger (cheese extra)"
--------------------------------------------------------------
Technical Details
Message-ID: <1992Sep29.234100.7104@netnews.whoi.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!ames!ncar!netnews.whoi.edu!news

Show Full Headers
Complete Article Headers
Newsgroups: sci.math.stat
Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!ames!ncar!netnews.whoi.edu!news
From: rich@boreas.whoi.edu
Subject: Robust Spectral Estimation of Gappy Series
Message-ID: <1992Sep29.234100.7104@netnews.whoi.edu>
Sender: news@netnews.whoi.edu
Organization: Woods Hole Oceanographic Institution
Date: Tue, 29 Sep 92 23:41:00 GMT
Lines: 32