Hypoinverse Station File Format
FORMAT OF THE NEW HYPOINVERSE STATION FILE FOR FULL 10-LETTER STATION NAMES
The station code consists of a 5-letter site code, a 2-letter network
code unique to the owner or operator of the network, and a 3-letter
component or channel code. The net and component fields are optional,
but space for these fields will be reserved in all input and output
files. The user of Hypoinverse may specify (with the LET command) how
many characters (counted from the left side) in each field to use when
matching names in station and phase files. Full use of the fields will
require 5, 2 and 3 letters; minimum use will require 3, 0 and 0
letters. Hypoinverse uses both a 1-letter (old style) and 3-letter
(new style) component field. Space for both fields will be reserved in
all input and output files. Select whether to use the 1- or 3-letter
field for matching station and phase names with the LES command. It is
useful to keep the 1-letter component field for easier recognition by
analysts than the newer, more general 3-letter field.
Cols. Format Data
_____ ______ ____
1-5 A5,1X Station site code. The first character may not be a
number or the $ character.
7-8 A2,1X Optional station network code
10 A1 Optional 1-letter component code for this station site.
11-13 A3,1X Optional 3-letter component code for this station site.
15 A1 Station weight code (in units of 0.1) by which the weights
assigned each P & S phase are to be multiplied. Use the
digits 0-9 for the weight in tenths; "*" or "0" for no
weight; or any other character (including blank) for full
weight.
16-17 I2, 1X Latitude, degrees.
19-25 F7.4 Latitude, minutes.
26 A1 N or blank for north latitude, S for south.
27-29 I3, 1X Longitude, degrees.
31-37 F7.4 Longitude, minutes.
38 A1 W or blank for west longitude, E for east.
39-42 4X Reserved for elevation in m. Not used by HYPOINVERSE.
43-45 F3.1,2X Default period (in sec) at which the maximum amplitude
will be read for this station. If period is given on phase
card, it overrides this value.
48 A1 Put a "2" or "A" here to designate this as an alternate
crust model station. Both alternate and primary crustal
models must be in use. Stations may also be tagged for
use with an alternate model in the delay file.
49 A1 Optional station remark field to copy to print output.
50-54 F5.2, 1X P delay (sec) for delay set 1.
56-60 F5.2, 1X P delay (sec) for delay set 2.
62-66 F5.2 Amplitude magnitude correction. If in the range +2.4, the
_
correction is included (by addition) in the amplitude
magnitude, If you don't want a station's magnitude used in
the event magnitude, use a correction of 5.0 plus the
actual correction or assign a zero weight (see below).
67 A1 Amplitude magnitude weight code. Codes 0-9, "*" and blank
are the same as the P & S weight codes. The actual weight
used is the product of those on the station and phase
cards.
68-72 F5.2 Duration magnitude correction (works the same as the
amplitude magnitude correction).
73 A1 Duration magnitude weight code (works the same as
the amplitude weight code).
74 I1 Instrument type code for this station used to select the
appropriate response curve to derive an equivalent Wood
Anderson amplitude. Must be either 0, 1 or 2:
0: Standard Wood-Anderson torsion seismograph.
1: USGS standard (1 HZ geophone, .7 critical damping.)
2: Hawaii-type Sprengnether seismometer.
75-80 F6.2 Calibration factor for amplitude magnitudes, equal to the
peak-to-peak amplitude of a 10 microvolt RMS signal at 5
hz applied to the VCO and measured in mm on the
Develocorder film viewer. For instrument types 0 and 2
this should generally be 1.0. A cal factor of 0.0
signifies an unknown response for which no amplitude
magnitudes will be computed. If a cal factor is given on a
phase card it overrides this value. The VCO attenuation
may be given in place of the cal factor (see the ATN
command). An entire history of station attenuations with
the dates of attenuation changes may be read from a
separate file with the ATE command.
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Updated 21 October 1996