AFI - STATION INSTRUMENTATION
3. Digital World Wide Standardized Seismograph System - DWWSSN: [ DW ]
DATES OF OPERATION: 27 Apr 1987 to 17 Nov 1991
SEISMOMETER TYPE AND ADC:
Streckeisen Model STS-1/VBB 3 component system.
DIGITAL FORMAT:
16 bit integer data words for all components. Range: +32,767 to -32,768 counts.
EVENT DETECTOR ALGORITHIM: The event detector used for the SZ channel was
developed by G. Holcomb at the ASL and is not documented. The mid-period channels
are detected on a straight forward amplitude basis.
Click on any of the following items for further information.
The Noise Study was done using 1992 data, consequently, it is only an estimation
for this generation of station instrumentation.
COMMENTS:
The original WWSSN seismometers were replaced with Streckeisens to provide
broad-band seismic data.
