Trip Report - August 1987 Swallow Float Deployment with RUM ( Remote Underwater Manipulator)

摘要

A special engineering test involving the deployment of two of the Marine Physical Lab.'s Swallow floats and the Remote Underwater Manipulator (RUM) was conducted in Aug '87. The purpose of the Swallow float experiment was to try to determine the effect of flow noise on the geophone signal levels and to deploy a Swallow float geophone sensor on the sediment using RUM. The experimental site was located in the Catalina basin (33 deg 12 min N, 118 deg 30 min W) in 1240 meter deep water. Swallow float data that were collected on 13-14 August are summarized. The Swallow floats were designed to be neutrally buoyant, freely drifting, very low frequency (1-20 Hz) particle velocity sensors. They usually contain within a 0.432 m diameter glass shell a three-component geophone (to measure the VLF particle velocity), a magnetic compass, and the necessary hardware to record up to 25 hours of data. They also usually contain an 8 kHz acoustic localization system. The 1-20 Hz Swallow float acoustic data are dominated by the presence of RUM.