https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.8 2026-04-29T10:52:37.449Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/instruments/b15d263b-6c51-4005-ba45-bfd2958fcd7d ACOUSTIC RECEIVERS An acoustic receiver array assembly includes an underwater vehicle having a base portion and an acoustic receiver portion. The base portion is provided with a rigid boundary wall defining a first largest diameter. The receiver portion is provided with a flexible boundary wall expandable from a generally cylindrical configuration of no more than the first diameter to an expanded configuration of a second diameter substantially larger than the first diameter, the receiver portion defining a chamber. Expansion means is disposed in the chamber and is operable to expand the receiver portion boundary wall to the second diameter. Acoustic receivers are mounted in the receiver portion and provide an acoustic receiver array which expands commensurately with the expansion of the receiver portion boundary wall.Group: Instrument_Details Entry_ID: ACOUSTIC RECEIVERS Group: Instrument_Identification Instrument_Category: In Situ/Laboratory Instruments Instrument_Class: Profilers/Sounders Instrument_Type: Acoustic Sounders Short_Name: ACOUSTIC RECEIVERS End_Group Group: Instrument_Associated_Sensors Short_Name: ACOUSTIC RECEIVERS Short_Name: SONAR Short_Name: USIM End_Group Sample_Image: http://www.pier.org/images/operations/tag_VR2_in_water.jpg Creation_Date: 2008-04-03End_Group