PZLIST: List of Continuous Instrument Responses

In TDD: Time-Domain Deconvolution of Seismometer Response

Description

List of continuous instrument responses of 14 common seismometers.

Usage

 data(PZLIST) 

Format

List of 14 lists, each consisting of:

Sense

Instrument passband sensitivity (V * s/m)

Knorm

Normalization constant

poles

Poles of Laplace transform of instrument response (rad/s)

np

Number of poles

zeros

Zeros of Laplace transform of instrument response (rad/s)

nz

Number of zeros

Details

Seismometers are numbered as follows:

Broadband Seismometers: 1. Streckeisen STS-1 (360 s) 2. Trillium 240 (generation 1) 3. Trillium 240 (generation 2) 4. Guralp CMG-3T 5. Streckeisen STS-2 (generation 1) 6. Streckeisen STS-2 (generation 2) 7. Streckeisen STS-2 (generation 3) 8. Trillium 120 9. Compact Trillium

Intermediate Seismometers: 10. Trillium 40 11. Guralp CMG-3ESP 12. Guralp CMG-40T (30 s) 13. Streckeisen STS-1 (20 s)

Short-period Seismometers: 14: Guralp CMG-40T (1 s)

Note

The STS-2 and Trillium 240 come in multiple generations, each with a slightly different response. For the Trillium 240, serial numbers less than 400 belong to generation 1, while serial numbers greater than or equal to 400 are in generation 2. To determine which generation an STS-2 is, see http://www.iris.edu/NRL/sensors/streckeisen/streckeisen_sts2_sensors.htm .

Certain short-period instruments were intentionally omitted because their responses depend on installation-specific parameters and are therefore not completely standardized. Given that discrete responses of short-period instruments can be calculated quickly, I consider the convenience of having pre-calculated responses for these instruments to not be worth the risk of the user selecting the wrong response and getting inaccurate results.

References

Each of these responses was drawn from either a manufacturer document or from IRIS; sources are noted in the comments of GetPZ.

Examples

# 40T response:
data(PZLIST)
PZ = PZLIST[[12]]

Example output

Loading required package: signal

Attaching package: 'signal'

The following objects are masked from 'package:stats':

    filter, poly

Loading required package: RSEIS
Loading required package: pracma

Attaching package: 'pracma'

The following objects are masked from 'package:RSEIS':

    detrend, hypot, logspace, peaks, trapz

The following objects are masked from 'package:signal':

    conv, ifft, interp1, pchip, polyval, roots


Attaching package: 'TDD'

The following object is masked from 'package:RSEIS':

    ReadInstr

TDD documentation built on May 2, 2019, 4:51 a.m.