AFI - STATION INSTRUMENTATION

1. Global Seismograph Network - GSN: IRIS -2 System

DATES OF OPERATION:  	 15 May 1996 to Present

SEISMOMETER TYPE AND ADC:
Streckeisen Model STS-2/VBB 3 component system, Streckeisen Model STS-1/VBB 3 
component system.  ADC is Quanterra Model Q-680.  Kinemetrics Model FBA-23 
for low-gain channels.

DIGITAL FORMAT:
24 bit integer data words for all components.  Range: +8,388,607 to -8,388,608 counts.

EVENT DETECTOR ALGORITHM:  
The Murdock event detector (Murdock, 1991) is used for the event detected components.

Click on any of the following items for further information.
The Noise Stuty was done using 1992 data, consequently, it is only an estimation for this generation of instrumentation.
COMMENTS:
A description of the IRIS-2 system can be found in USGS Open-File Report 89-471, Peterson et al (1989).  
The BC_ calibration channels are programmed manually by the station operator and  
are rarely used as the calibration signal has a detrimental effect on the ultra 
long-period data.