Publication Date:
2013-09-18
Description:
Instrument self-noise and sensor misalignment Advances in Geosciences, 36, 17-20, 2013 Author(s): A. Gerner and G. Bokelmann In this study we investigate self-noise of RefTek TM 151-60A "Observer" broadband seismometers (flat to velocity between 50 Hz down to T 0 =60 s, f 0 ≈17 mHz) using the coherency analysis method introduced by Sleeman et al. (2006). We present a self-noise model for this type of sensor and compare it to the self-noise models of the standard observatory sensor STS-2 (Streckeisen) and RefTek's 151-120 broadband seismometer, which both have natural periods T 0 of 120 s. We further report on the sensitivity of this technique to sensor misalignment and our success of eliminating leakage of the omnipresent microseism noise into self-noise estimates by numerically rotating seismic traces in order to find real self-noise.
Print ISSN:
1680-7340
Electronic ISSN:
1680-7359
Topics:
Geosciences
