Last modified 16 months ago
Last modified on 05/29/12 10:43:27
Hypoinverse Station File Format
FORMAT OF THE HYPOINVERSE STATION FILE FOR FULL 12-LETTER (S-C-N-L) CHANNEL NAMES The channel identifier consists of a 5-letter site code, a 2-letter network code unique to the owner or operator of the network, a 3-letter component or channel code, and a 2-letter location code. The net, component, and location fields are optional to Hypoinverse, 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, 3, and 2 letters; minimum use will require 3, 0, 0 and 0 letters. Hypoinverse can use both a 1-letter (old USGS style) and 3-letter (SEED 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 sometimes 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 Station network code. 10 A1 Optional 1-letter component code for this channel. 11-13 A3,1X 3-letter component code for this channel. 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. Must be greater than 0.1. 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. You can also assign a zero weight (see next). 67 A1 Amplitude magnitude weight code. Codes 0-9, "*" and blank are the same as the P & S weight codes (col 15). The actual magnitude weight used is the product of those on the station and phase cards. See also col 62. 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. 81-82 A2 2-letter location code. Earthworm follows the SEED convention of allowed characters (A-Z, 0-9, space). In apparent contradiction to the previous statement, Earthworm uses the character '-' to represent 'space' in all Earthworm I/O. Just remember to think 'space' when you see '-'. Lower case alphanumerics are not permitted. The location code should always contain 2 characters, either two alpha-numeric characters or two spaces ('--' or ' '). The use of a single space (or '-') adjacent to an alpha-numeric is not permitted.
Other details of hypoinverse configuration can be found in the complete Hypoinverse documentation maintained by Fred Klein at: