Skip to main content
U.S. flag

An official website of the United States government

This site is currently in beta, and your feedback is helping shape its ongoing development.

CRED Simrad em3002d Backscatter imagery of the western and central banktop and bank edge environments at French Frigate Shoals, Hawaii, USA

Published by Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 27, 2026 | Last Modified: 2009-09-01T00:00:00.000+00:00
Backscatter imagery extracted from gridded bathymetry of the western and central banktop and bank edge environments at French Frigate Shoals, Northwestern Hawaiian Islands, USA. These data provide almost complete coverage between 20 and 100 meters. The backscatter dataset includes Simrad EM3002d and Reson 8101 data. The sonars frequencies are 300 kHz and 240 kHz respectively and are processed and gridded separately. Because of the similar sonar frequencies the data can be mosaicked nearly seamlessly using GIS software. This metadata is for the Simrad em3002d backscatter data only.

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov