COCO - STATION INSTRUMENTATION

1. Global Seismograph Network - GSN:

DATES OF OPERATION:     23 May 1997  to Present.

SEISMOMETER TYPE AND ADC:
Teledyne Brown Model KS-54000.  A borehole three component system for 
broadband long period, and very long period channels recorded at 20 sps, 
1 sps, and 0.1 sps respectively. Guralp Systems model CMG-3T 3-component 
seismometer for short-period channels continuously recorded at 40 samples 
per second (channel designator sh*). Streckeisen Model STS-2 triaxial 
seismometer for short period channels recorded at 40 sps continuous mode 
(channel designator eh*). IDA MK7 data acquisition system.

CALIBRATION EPOCHS:	1997, 143 - Present

DIGITAL FORMAT:
32 bit integer data words for all broadband (20 sps), long period (1 sps), very
long period (.1 sps), and short period (40 sps) channels.

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