CTAO - STATION INSTRUMENTATION

2.  Abbreviated Seismic Research Observatory - ASRO:  [ AS ]

DATES OF OPERATION:  	27 Sep 1987 to 17 Jun 1991

SEISMOMETER TYPE
Streckeisen Model STS-1/VBB, 3 component system.

DIGITAL FORMAT:
16 bit gain-ranged data words for all components.  Range: +2,096,1128 to -2,097,152 counts.

EVENT DETECTOR ALGORITHIM:  
The Murdock event detector (Murdock 1983) was installed on 03 May 1983. Prior
to that time a detector developed for the SRO/ASRO systems by the Unitech Corp.,
Austin, Texas was used.  This detector was not documented.

Click on any of the following items for further information.

The Noise Study was done using 1992 data, consequently, it is only an estimation for this generation of station instrumentation.
COMMENTS:
All of the ASRO installations were upgrades of High-Gain Long Period systems and use
the same format as the SRO.  CTAO was further upgraded in September, 1987 when
Streckeisen broadband  seismometers were installed.