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2018 EK Calibration Report. EX-18-02, Gulf of Mexico mapping and emerging technology demonstration cruise
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2018
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Series: EX-18-02
[PDF-5.54 MB]
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Description:Calibration of the Simrad EK 60 echosounders on the NOAA Ship Okeanos Explorer took place
March 2018 in the Gulf of Mexico during cruise EX-18-02. Four frequencies (18, 70, 120 and 200
kilohertz (kHz)) were calibrated at the pulse length of 1.024 milliseconds (ms) and maximum
power for each frequency. The 18 and 70 kHz were calibrated at the additional pulse lengths of
4.096 ms and 2.048 ms, respectively. Additionally, two Wide Band Transceivers (WBTs) on loan
from the University of New Hampshire (UNH) were calibrated at requested UNH settings. As
they were the property of UNH, they will not be detailed in this report. The 38 kHz frequency
was not successfully calibrated as it was not able to detect the sphere at the known target
strength. Further updates from the ship indicate that the 38 kHz transducer might be damaged
and all data produced by this sonar in 2018 should be considered in light of this.
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Rights Information:CC0 Public Domain
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Compliance:Submitted
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