KAAO - STATION INSTRUMENTATION

1. Abbreviated Seismic Research Observatory - ASRO:   [AS]
	
Dates of Operation:  01 May 1977 to 31 Jul 1982 

SEISMOMETER TYPE:
A three component set of Geotech long-period seismometers (S-12 horizontals and
a S-11 vertical) with a period set at 30 seconds are installed inside a sealed
tank which is filled with argon gas.  The short period vertical component is
obtained from a Johnson Matheson Model 6480 seismometer.

DIGITIAL FORMAT:
16 bit gain-ranged data words for all components.  
Range: +2,096,128 to -2,097,152 counts.

EVENT DETECTOR ALGORITHM:
A detector developed by the Unitech Corp., Austin, Texas was used for the SHZ
channels.  This detector was not documented.

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:
The ASRO systems have the same format and the same response as the SRO systems.
The digital recording system and the software are identical to the SRO.  

During most of 1981 and 1982 the data received from KAAO was infrequent and of
poor quality.  KAAO was closed during the war in Afganistan.  Any questions
regarding this station should be addressed to the Albuquerque Seismological
Laboratory.