. "Ocean bottom seismometer instruments designed by the Lamont-Doherty Earth Observatory (LDEO). Seismometer sensors are either a L4C 1 Hz geophone and a differential pressure gauge or a Trillium Compact seismometer, a Paroscientific absolute pressure gauge, and a hydrophone. They can be deployed for depths up to 1000 m or 5000 m. They can be deployed for a maximum duration of 400 days."@en . "Lamont-Doherty Earth Observatory ocean bottom seismometer series"@en . . . "SDN:L22::TOOL1112" . "SDN:L22::TOOL1112" . . "accepted"@en . "2" . "SDN:L22::TOOL1112" . . "LDEO OBS" . . "2017-02-13 10:52:07.0" . "2017-02-13 10:52:07.0" . . "2" . "false" . .