LOCSAT locator for SeisComP.
The LocSAT locator interface implements a wrapper for the LocSAT locator written by Walter Nagy (according to the README file shipped with the LocSAT distribution).
Travel time tables¶
SeisComP ships with two predefined travel time tables: tab and iasp91.
LocSAT travel time tables are located under
The default profile is iasp91.
LocSAT does not support station corrections natively. At least checking the code:
sta_cor[i] = 0.0; /* FIX !!!!!!*/
However the SeisComP wrapper adds this feature. It allows to define a
.stacor file which defines corrections of observation times
in seconds. A correction is subtracted (not added) from
the observation time to be compatible with the NonLinLoc station correction
Each LocSAT profile (travel time table) can have an associated station
correction file. To use station corrections for the iasp91 tables, the file
share/locsat/tables/iasp91.stacor needs to be created.
A station correction table looks like this:
# LOCDELAY code phase numReadings delay LOCDELAY GE.MORC P 1 -0.1
The fourth column (numReadings) is ignored and just provided for compatibility reasons with NonLinLoc.
code (string) station code (after all alias evaluations)
phase (string) phase type (any of the available travel time tables)
numReadings (integer) number of residuals used to calculate mean residual/delay (not used by NLLoc, included for compatibility with the format of a summary, phase statistics file)
delay (float) delay in seconds, subtracted from observed time
Defines a list of available LOCSAT tab directories. Default is
Compute the confidence ellipsoid. Default is
The initial depth estimate for LocSAT. Default is
The default pick time uncertainty assigned to LocSATs arrival deltim attribute if pick uncertainties are not going to be used or if they are absent. A time uncertainty of 0 s may result in errors of the SVD decomposition in LocSAT. Default is
Whether to use pick time untertainties for arrival deltim rather than a fixed time error. If true then the uncertainties are retrieved from each individual pick object. If they are not defined then the default pick time uncertainty will be used as fallback. Default is
Number of degrees of freedom. Default is
Confidence level between 0.5 and 1. Default is