Accession Number:

ADA048867

Title:

Variable Band-Pass Wave Recorder and its Use at USNEL Oceanographic Tower.

Descriptive Note:

Technical memo.,

Corporate Author:

NAVY ELECTRONICS LAB SAN DIEGO CALIF

Personal Author(s):

• Smith,Robert R.

Report Date:

1964-02-26

Pagination or Media Count:

20.0

Abstract:

A pneumatically filtered wave recorder was built, using a differential pressure transducer as the sensing device. The pneumatic filters are analogous to electrical RC-circuits, passing waves only in a desired pass band. With the proper choice of filters, the tide or swell or both can be attenuated to a great extent. Hence the record obtained is free from swell noise so that longer period waves can be seen.

Descriptors:

• *OCEAN WAVES
• *RECORDING SYSTEMS
• *BANDPASS FILTERS
• *PNEUMATIC EQUIPMENT
• PRESSURE TRANSDUCERS
• LONG RANGE(TIME)
• OCEANOGRAPHIC DATA
• ANALOG SYSTEMS
• PERIODIC VARIATIONS

Subject Categories:

• Physical and Dynamic Oceanography
• Hydraulic and Pneumatic Equipment
• Recording and Playback Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE