Seismograph

We used a GEOMETRICS Mod. Stratavisor NX, 48 Channels seismograph, with embedded CNT-1 controller. The pre-amplifier gain was set to 36 db and the sampling rate was 1 msec, for record lengths ranging from 8 to 13.6 seconds. The data were recorded on 15GB DLT tape cassettes in the SEG-D 8058 Rev.1 and 8048 Rev.0 formats. DAT and 3480 tape drives available on line for emergency recording in case of faults of the DLT drive, but were never used. The automatic log files were recorded for every line shot, and supplemented the written operator's logs.

Figure 4: BS98. LEG1. Navigation MCS.