Manufacture of Additional External Sensor Packages for the New ONR OBS
Final rept. 15 Nov 1989-30 Sep 1990,
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARY SCIENCES
Pagination or Media Count:
The objective of this project was to construct four sensor packages for the ONR ocean bottom seismometer OBS system. These units augment 27 sensor packages designed and constructed under a separate ONR-supported subcontract from the Woods Hole Oceanographic Institution WHOI. The sensor package is a semi-autonomous unit designed to be carried to the seafloor onboard the main ONR OBS frame. Upon landing the package is placed on the bottom by a deployment arm attached to the main frame when the main instrument is retrieved the sensor unit is recovered as well. The sensor package consists of a housing, a passively gimbaled 3-component array of 1-Hz seismometers, digitally controlled variable gain preamps, and a calibration signal generator. The four sensor packages have been constructed, fully tested, and delivered to the ONR OBS Facility at WHOI.
- Seismic Detection and Detectors