Details:

Alternative Title:
EX-19-02: ROV and Mapping Shakedown
Personal Author:
Copeland, Adrienne ; Sowers, Derek ; Hoy, Shannon ; Lobecker, Meme
Copeland, Adrienne ; Sowers, Derek ; Hoy, Shannon ; Lobecker, Meme Less -
Corporate Authors:
United States. National Oceanic and Atmospheric Administration. Office of Ocean Exploration and Research
NOAA Program & Office:
Ocean Exploration Program ; OAR (Oceanic and Atmospheric Research)
Ocean Exploration Program ; OAR (Oceanic and Atmospheric Research) Less -
Description:
Calibration of the Simrad EK 60 echosounders on NOAA Ship Okeanos Explorer took place May 2019 in the Gulf of Mexico during cruise EX-19-02. Three EK 60 frequencies (18, 120, and 200 kHz) were calibrated at the pulse length of 1.024 milliseconds (ms) and max power for each frequency. The 18 kHz was calibrated at the additional pulse length of 4.096 ms. A 70 kHz wide band transceiver (WBT) was also calibrated at both the continuous wave (CW) and frequency modulated (FM) modes at 1.024 and 2.048, and 1.024, 2.048, 4.096, and 8.192 ms pulse lengths, respectively. The 38 kHz frequency was not successfully calibrated as it had very low detections of the sphere in three quadrants at the known target strength (a similar issue was documented in 2018). Further updates from the ship indicate that the 38 kHz transducer might have an impedance issue, and is already planned for replacement during the next drydock period with a newer version that supports FM pulses.
Keywords:
[+]
Calibration
Equipment

DOI:
https://doi.org/10.25923/wzk7-6d52
Document Type:
Technical Report
Place as Subject:
Mexico, Gulf of
Rights Information:
Public Domain
Compliance:
Submitted
Main Document Checksum:
[+]
urn:sha256:8e8ee7ee988db8c2385aa8eb1584058f9a31a21f57fbdc805d24c3f2d581c226
File Type:

Supporting Files

• No Additional Files

More +