Manufacture of Additional External Sensor Packages for the New ONR OBS

摘要

The objective of this project was to construct four sensor packages for the ONRocean 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.