Albuquerque Seismological Laboratory
IRIS 2, GSN systems
The stations with configurations from Table A represent the bulk of the stations operated by the ASL. These all utilize IRIS-2 type Quanterra data loggers operating any one of a number of different versions of the Quanterra Ultrashear software. These data acquisition systems began to be installed in March of 1992 and have continued to the present. These systems represent the bulk of the IRIS/USGS stations of the GSN.
It is planned to have all of these stations upgraded to the soon to be available Multishear software by the year 2000. This upgrade will, among other things, correct the timing problem and provide a bit flag within each data packet to document the timing correction.