Instrument: Camera - Sediment Profile Imaging

Acronym:
 SPI Camera
External Identifier:
» skos:broadMatch http://vocab.nerc.ac.uk/collection/L05/current/378/
Description

The sediment profile imaging (SPI) system is designed to photograph the sediment-water interface without creating disturbance. A sharp-edged prism cuts cleanly into the sediment to a depth of 15 to 20 cm. The camera is mounted in the top of the prism, and a mirror is used to reflect the sediment image to the camera from the vertical faceplate. Since the sediment is right up against the faceplate, lack of water clarity is never a limitation on this optical method. (from http://www.csc.noaa.gov/benthic/mapping/techniques/sensors/spi.htm)