S12B-04:
"An Analysis of Tradeoffs Between Seismometer Performance and Convenience"
Abstract:
In recent years, a multitude of different broadband seismometers of varying periods and performancespecifications have been developed. Scientists often have the unenviable task of selecting the best
equipment to suit a broad range of applications. We provide a high level view of some of the tradeoffs
available to the sensor design team that directly impact the utility and cost of the final product.
Additionally we review costs related to network installation, maintenance and operation and investigate
how these can be influenced by instrument choice. We compare the low noise model, the high noise
model, and the site noise of a typical installation to the expected signal strength for a variety of case
studies ranging from teleseismic to microseismic settings. For each case study we determine the effective
passband, the frequency range in which the expected signal exceeds both the site and instrument noise.
We compare the effective passband of a number of different instruments and investigate the effects
of changes to both instrument and site noise on the size of the passband. We find that for typical
installations, the site noise has the largest influence on the effective passband of an instrument. We
demonstrate that in some circumstances tradeoffs in certain performance specifications can pay dividends
in ease and cost of deployment without compromising overall network performance.