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

DATES OF OPERATION:  	29 Oct 1989 to Present.

SEISMOMETER TYPE AND ADC:
Streckeisen Model STS-1/VBB 3 component system.  ADC is Quanterra Model Q-52K 

DIGITAL FORMAT:
24 bit integer data words for all broadband (20 sps), long period (1 sps), very
long period (0.1 sps), and ultra long period (0.01 sps) channels.  Range: +8,388,607 
to -8,388,608 counts.16 bit integer data words for mass position channels.  Range: 
+32767 to 32768 counts.

EVENT DETECTOR ALGORITHM:   None

Click on any of the following items for further information.

• Channel Data
• Amplitude Response to Ground Velocity
• Seismic Noise Study graph information
  • Seismic Noise Level - Annual
  • Seismic Noise Level - Seasonal/Diurnal

COMMENTS:
A description of the IRIS-2 system can be found in USGS Open-File Report 89-471, Peterson et al (1989).