1. Global Seismograph Network - GSN:  IRIS-1 System  [ IU ]

DATES OF OPERATION:  	01 Jan 1988 to Present.

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

DIGITAL FORMAT:
24 bit integer data words for all broad-dand (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.  16 bit integer data words for mass 
positions channels. Range: +32767 to -32768.

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 detailed description of the IRIS-1 system can be found in Peterson et al (1989).