TDD (version 0.4)

DPZLIST: List of Pre-Calculated Discrete Instrument Responses

Description

List of discrete instrument responses of 14 common seismometers for 6 common sample intervals.

Usage

data(DPZLIST)

Format

List of 14 lists (each corresponding to a different seismometer), each including 6 lists (each corresponding to a different sample interval), each containing the following elements:

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

dt

Sample interval for this response (s)

fmax

Maximum frequency for which this digital response matches the true analog response of the sensor within 1%

Zpg

Zpg-class element (from package 'signal') giving the digital response of the filter in terms of its zeros and poles (in Z-transform space) and gain.

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)

Digital responses are provided for the following six sample intervals (in seconds): 1, 0.1, 0.05, 0.025, 0.02, 0.01.

Examples

# 40T, 0.01-s response:
data(DPZLIST)
DPZ = DPZLIST[[12]][[6]]