| Network |
1 or 2 character network code (required). |
| Station |
Up to 5 character station code (required). |
| Location |
2 character location identifier. Use loc=--
for empty location codes. |
| Channel |
3 character channel code. |
| Start Time |
Waveform start time.
Specify time as: YYYY-MM-DD HH:mm:ss (e.g. "2010-06-14 00:00:00"). |
| End Time |
Waveform end time.
Specify time as: YYYY-MM-DD HH:mm:ss (e.g. "2010-06-14 00:00:00"). |
| Correction (correct) |
Perform Instrument Correction applies
deconvolution or polynomial response correction to convert
to earth units.
Apply Total Sensitivity scales data to stage-zero gain.
|
| Frequency Limits (freqlimits) |
Specify an envelope for a spectrum taper for
deconvolution. Frequencies are specified in Hertz. This
cosine taper scales the spectrum from 0 to 1 between
f1 and f2 and from 1 to 0 between f3 and f4. Can only
be used with Perform Instrument Correction. Cannot be
used in combination with Auto Limits. |
| Auto Limits (autolimits) |
Automatically determine frequency limits for
deconvolution. A pass band is determined for all
frequencies with the lower and upper corner cutoffs
defined in terms of dB down from the maximum amplitude.
This algorithm is designed to work with flat responses,
i.e. a response in velocity for an instrument which is
flat to velocity. Other combinations will likely result
in unsatisfactory results. Can only be used with Perform
Instrument Correction. Cannot be used in combination
with Frequency Limits. |
| Units (can only be used with correct) |
DEF – converts to units indicated in response metadataDIS – converts to units of displacementVEL – converts to units of velocityACC – converts to units of acceleration
|
| Scale (scale) |
Scale data samples by specified factor. |
| Div-Scale (divscale) |
Inverse scale data samples by specified factor. |
| Remove Mean (demean) |
Remove mean value from data. |
| Low–Pass Filter (lp) |
Low–pass filter the time–series
using an IIR 4th order filter. Hertz. |
| High–Pass Filter (hp) |
High–pass filter the time–series
using an IIR 4th order filter. Hertz. |
| Band–Pass Filter (bp) |
Band–pass frequencies. Hertz |
| Differentiate (diff) |
Differentiate using 2 point (un-centered) method |
| Integrate (int) |
Integrate using trapezoidal (midpoint) method. |
| Envelope (envelope) |
Calculate the envelope of the time series. This
calculation uses a Hilbert transform approximated by a
time domain filter. |
| Taper Function |
Apply a symmetric tapering function to the timeseries
data. The width is specified as a fraction of the trace
length from 0 to 0.5. |
| Taper Window Type |
Optionally choose the taper window function. Supported
types: HANNING, HAMMING,
COSINE. |
| Decimate (samples per sec) |
Specify the sample–rate to decimate to. The sample-rate
of the source divided by the given sample-rate must be
factorable by 2,3,4,7 |
| Format |
Choose format type from:
miniseed: ascii1: ASCII 1 column data format (values)ascii2: ASCII 2 column data format (time, value)geocsv.slist: GeoCSV 1 column format (values)geocsv.tspair: GeoCSV 2 column format (time, value)audio: Audio WAV fileplot: Plot (default)sac.zip: SAC Zip
|
| Plot Dimensions |
Width and height in pixels. |
| Anti Alias Plot |
Reduce jagged appearance of plots |
| Audio Dynamic Range Compression (audiocompress) |
Apply dynamic range compression to waveform data.
Can only be specified with the format=audio
option. |
| Audio Sample Rate (audiosamplerate) |
The sample rate of the output wav file in Hz.
Defaults to 16000. Must be an integer.
Can only be specified with the format=audio
option. |
