Detailed data base description can be found at http://www.passcal.nmt.edu/software/datascope/datascope.html .
The Dbase output directory contains data
base. Lets data base name is dbase
and Dbase is the data base directory.
Dbase directory contains following directories and files:
response/ - instrument response directory
If input records was decimated to 1&10 seconds
than output records are in directories:
wf_l/
- binary time series files directory (1 count per second)
wf_v/
- binary time series files directory (1 count per 10 second)
If the data base contains time series with original sampling than output
records is in directory
wf/ - binary time series files directory
Frequency-time analysis and source inversion programs
use following data base tables mentioned below.
If input records was decimated to 1&10 seconds:
"dbase_l.wfdisc"- Waveform file header and descriptive
information. This table provides a pointer (or index) to waveforms stored in wf_l/ directory.
"dbase_v.wfdisc"- This table provides a pointer
to waveforms stored in wf_v/ directory.
If data base contains time series with original sampling:
"dbase.wfdisc"- This table provides a pointer
to waveforms stored on wf directory.
"dbase.instrument" - calibration
information about a station. This table serves three purposes. It holds
nominal one-frequency calibration factors for each instrument. It holds
pointers to the nominal frequency-dependent calibration for an instrument.
Finally, it holds pointers to the exact calibrations obtained by direct
measurement on a particular instrument. See sensor.
"dbase.site"- Station location information. Site names
and describes a point on the earth where seismic measurements are made ( e.g.
the location of a seismic instrument or array). It contains information
that normally changes infrequently, such as location. In addition,
site contains fields to describe the offset of a station relative to an
array reference location. Global data integrity implies that the sta/ondate
in site be consistent with the sta/chan/ondate in sitechan.
"dbase.sensor"- Specific calibration information
for physical channels. This table provides a record of updates in the calibration
factor or clock error of each instrument, and links a sta/chan/time to a
complete instrument response in the relation instrument.
"dbase.sitechan"- Station-channel information.This relation
describes the orientation of a recording channel at the site referenced by
sta. This relation provides information about the various channels
(e.g. sz, lz, iz ) that are available at a station and maintains a
record of the physical channel configuration at a site.
"dbase.origin" - Data on event time, location and magnitude.
