To be able to apply array operations like beamforming or vespagrams or for computing source locations SH/SHM needs station information of the records.This information is read from a file $SH_INPUTS/STATINF.DAT only. Station information specified in data input files like GSE is ignored. The format specifications of the STATINF.DAT file are:
Valid keywords are:
After the STATINF.DAT file has been modified, it is recommended to restart SH/SHM, since it holds an internal cache for the station entries.
The way SH/SHM computes relative locations xrel and yrel from latitude and longitude is:
lat := location latitude; lon := location longitude reflat := latitude of reference point; reflon = lon. of reference point C := 111.19 km/deg x = (lon - reflon) * C * cos(lat) y = (lat - reflat) * C
The code fails definitely if an array is located across the zero meridian.
This page last modified 4-Jul-2000