San Francisco State University Physics and Astronomy
Department
SFSU Pacific Oceanography
Project
SFSU Private Area. WARNING: Material on this
page is work
in progress; results and conclusions may change without notice.
(
research
|PSM home
|P&A Dept
|SFSU
|
software)
Plots of spectrogram slope (alpha)
versus
central frequency (f0) from least-squares fit to the time
series, for all events.
| Slope of spectrogram alpha versus central
frequency f0, large scale (all events on the plot). The
numbers in the upper-right-hand corner of each plot are: total number
of events, number of events on the plot, (and, for the 1-D plots) mean
and standard deviation for the distribution.
Note the hexagonal
patterns of clusters of events, with a large-scale hexagon nearly filling
the plot, and a medium-scale pattern in the center of the plot. |
 |
| f0 vs alpha, medium
scale. The medium-scale hexagon now fills the plot, with the small-
scale hexagon in the center. |
 |
| f0 vs alpha, small
scale. The smallest of the three hexagons now fills the plot.
|
 |
| f0 vs alpha, blowup
of central region. The 973 events remaining on this plot constitute
the sample of correctly fit "B" calls. |
 |
IDL program rdfit.pro used to read in
data from least-squares fits.
IDL program plotbw2 used to make the graphs below.