QAT

2020 Kilo Moana EM122/EM710 QAT

Multibeam System:

EM122

EM710

CruiseID:

KM2008B

KM 2020 QAT Planning Overview

  • The University of Hawaii’s UNOLS vessel R/V Kilo Moana(KM) is equipped with Kongsberg Maritime EM122 and EM710 multibeam echosounders and an ApplanixPOS MV-320 v5 Ocean Master positioning / attitude system
  • The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s multibeam echosoundersahead of the 2020 field season; due to widespread travel restrictions, MAC personnel provided remote support for line planning and data analysis from shore

2020 Healy EM122 QAT Report

Multibeam System:

EM122

CruiseID:

HLY20TC

  • The USCGC Healy (HLY) is equipped with a Kongsberg Maritime EM122 multibeam echosounder (1° TX x 2° RX) with Seapath 330+ (primary) and Applanix POS MV (secondary) positioning / attitude systems
  • The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s multibeam echosounders ahead of the 2020 field season; due to widespread travel restrictions, MAC personnel provided remote support for line planning and data analysis from shore

2020 Sikuliaq EM302/EM710 Calibration Report

Multibeam System:

EM302

EM710

CruiseID:

SKQ2020S

SKQ202008S Planning Overview

  • The University of Alaska’s UNOLS vessel R/V Sikuliaq(SKQ) is equipped with Kongsberg Maritime EM302 and EM710 multibeam echosounders and a Seapath320 positioning / attitude system
  • The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s EM302 and EM710 ahead of the 2020 field season; due to widespread travel restrictions, MAC personnel provided remote support for line planning and data analysis from shore

2019 Armstrong EM122 and EM710 Calibration

Multibeam System:

EM122

EM710

CruiseID:

AR42

Executive Summary

  1. Calibrations (‘patch tests’) were planned for the EM122 and EM710 multibeam echosounders on R/V Neil Armstrong during AR42-02 following the winter 2019-20 maintenance period. Calibration sites were developed opportunistically along a transit route in the vicinity of the western Florida escarpment.
  2. The EM710 was most recently calibrated during AR41 in November 2019; due to elevated sea state, the scope of AR41 was narrowed and the EM122 calibration planned for that cruise was removed from the schedule.

Atlantis Seapath Test 2019

Multibeam System:

EM122

CruiseID:

AT42-10

Executive Summary:

  1. R/V Atlantis EM122 multibeam data includes intermittent depth artifacts across the swath that do not appear to be correlated with roll, pitch, sound speed, latency, or other sensor integration errors. These were first brought to the attention of the Multibeam Advisory Committee (MAC) in late 2016, beginning a process of investigation to better define the problem and rule out a variety of potential causes.

 

2019 Okeanos Explorer EM302 Shakedown

Multibeam System:

EM302

CruiseID:

EX1902

Summary
The primary shakedown activities included:

  • 2019-05-12: depart Pascagoula, MS
  • EM302 and POS MV geometry / config. review
  • EM302 dockside BISTs (incl. TX channels)
  • Geometric calibration (‘patch test’)
  • Backscatter calibration (for Kongsberg processing)
  • Roll verification
  • Swath extinction data collection during transits
  • EM302 RX noise vs. speed testing
  • Acoustic interference testing across all systems
  • K-Sync SAT and testing with Kongsberg support

2019 R/V Armstrong EM710 Calibration

Multibeam System:

EM710

CruiseID:

AR41

Executive Summary

  1. Calibrations (‘patch tests’) were planned for the EM710 and EM122 multibeam echosounders on R/V Neil Armstrong in the vicinity of the continental shelf break south of WHOI for opportunistic testing in 2019. These tests were scheduled for AR41 in November; due to elevated sea state, AR41 was shortened and the EM122 calibration was removed from the schedule. After review of the system geometry and POS MV GAMS antenna calibration, the EM710 patch test was performed amid other science goals in the condensed schedule.

 

2019 Sikuliaq Calibration Report

Multibeam System:

EM302

EM710

CruiseID:

SKQ201907T

The University of Alaska’s UNOLS vessel R/V Sikuliaq(SKQ) is equipped with Kongsberg Maritime EM302 and EM710 multibeam echosounders and a Seapath320 positioning / attitude system

  1. The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s EM302 and EM710 ahead of the 2019 field season; due to scheduling constraints, MAC personnel (Kevin Jerram and TomerKetter) provided remote support for line planning and data analysis from shore

 

2018 E/V Nautilus Quality Assessment Report

Multibeam System:

EM302

CruiseID:

NA093

Executive Summary

2019 E/V Nautilus Quality Assessment Report

Multibeam System:

EM302

CruiseID:

NA105

Executive Summary

Kilo Moana 2015 EM122 MBES Review

Multibeam System:

EM122

CruiseID:

KM1514

Introduction

Reference Surfaces

Reference Surfaces produced by the MAC can be downloaded from the Marine Geoscience Data System. If you have a Reference Surface to contribute please contact us at mac-help@unols.org.

E/V Nautilus Spring 2014 Quality Assessment Report

Multibeam System:

EM302

CruiseID:

NA040

Summary and Recommendations

  • As it stands now, the EM302 and associated sensors are working well as compared to other EM302s evaluated recently. The patch test revealed very slight residual angular offsets, indicating a successful reinstallation of the MRU and no apparent change to any other component of the system.

 

E/V Nautilus Spring 2015 Quality Assessment Report

Multibeam System:

EM302

CruiseID:

NA055

Summary and Recommendations

  • Heading into the 2015 operating season, the EM302 and associated sensors aboard E/V Nautilus are working well compared to previous evaluations and to other EM302 systems examined recently. The patch test showed no pitch or yaw bias and only a very slight residual angular offset for roll, indicating no major changes to the system geometry.

 

Reference Surfaces

The following cruises include Reference Surface Surveys:
http://www.rvdata.us/catalog/KM0201 (Atlantic)
http://www.rvdata.us/catalog/KM1001 (Pacific)
http://www.rvdata.us/catalog/AT18-06 (Pacific)
http://www.rvdata.us/catalog/RR1301 (Pacific)

Falkor Fall 2014 Quality Assessment Report

The EM302 and EM710 multibeams were successfully calibrated and verified for use with both the loaner Seapath MRU and the new POS MV. Angular offsets were small except for the roll bias for both the EM710 and EM302. As both multibeam systems have the same large roll bias, it is likely the result of a shift in the mounting angle of the MRU. Both SIS acquisition systems have been updated with the new calibration results.

Falkor Spring 2014 Quality Assessment Report

The transducer impedances are similar to baseline measurements in 2012 and with those taken in 2013. Transducer conditions, based on these tests, are acceptable and there is no sign of degradation of the transducer arrays.

Noise levels for the EM710 remain unchanged and very low. Noise levels for the EM302 have increased at higher speeds though they remain low when the ship is stationary in the water, suggesting that the increase is associated with flow noise and/or the propulsion system.

Introduction to Patch Tests

Basic overview of how and why to conduct a patch test.

2014 QAT Review of R2R MBQA Tests

Overview

The Rolling Deck to Repository (R2R) Program has developed programmatic quality assessment (QA) routines intended to identify suspicious data that may indicate sensor and/or operational problems. In order to assess the results of these QA tests and seek fleet-wide patterns in system performance and operation, this page provides an initial summary the results of R2R Multibeam QA tests for all sonar systems.

Tool: Sound Velocity Profile (SVP) Editor [v.1.0.5] [Deprecated]

This tool is no longer supported by the MAC, please use the SSP Library & Manager

For new installations:
1) Visit ftp.ccom.unh.edu, login as ‘anonymous’ and use your email as the password.
2) Navigate to “fromccom/MAC_DATA/” and download Tools.zip, PythonInstall.zip, and Data.zip
3) “Unzip” each of the downloaded files.
4.) Follow the installation directions found in the “SVP Editor Manual v1.0.5.pdf” file located in the “Tools/SVP Editor” directory.

ANT

RV Bat Galim 2016 Acoustic Test Report

During the at-sea test on BAT GALIM, the main objective was to determine ship acoustic characteristics and to assess potential impacts to sonar performance from all acoustic sources. The primary sonars of interest were the newly installed Kongsberg EM 302 and EM 2040 multibeam systems. The following evaluations were accomplished as part this testing:

  1. The overall noise levels of BAT GALIM were measured and characterized with special test sensors and internal noise routines inherent in the Kongsberg sonars.
  2. Propeller cavitation characteristics were assessed.

Kilo Moana 2015 Acoustic Test Report

Multibeam System:

EM122

Executive Summary

Conclusions

  • The EM 122 receive array had a bad preamplifier board that was causing the entire array to have higher noise levels and to exhibit non-uniform distribution of noise characteristics.2.The EM 122 receive array module 6 was out of phase with the rest of the sonar receive array.
  • The EM 122 receive array module 6 was out of phase with the rest of the sonar receive array.
  • Propeller cavitation performance was good and consistent with previous results.

 

Optimizing Sonar Performance by Managing Acoustics

Presentation given at the 2014 INMARTECH Meeting in Corvallis, Oregon in November, 2014.

Highlights:
Typical Sources of Acoustic Noise:

  • Machinery Noise
  • Sonar Interference
  • Electronic Noise
  • Propeller Cavitation (Hub and Tip Vortex)
  • Hydrodynamic Flow Noise
  • Appendage Cavitation
  • Transients
  • Bubble Sweepdown

 

Why Acoustic Noise is Important:

  • Excessive ship-related noise can degrade sonar performance
  • Degraded sonar performance will impact quality of acquired sonar data

 

Healy 2014 Acoustic Test Report

Gates Acoustic Services was tasked by SCRIPPS Institute of Oceanography to investigate and quantify acoustic issues associated with operation of the USCGC HEALY (WAGBG20). An at-sea investigation was accomplished during ship operations in deep water out of Nome, Alaska on August 13-24, 2014.

Sikuliaq 2014 Acoustic Test Report

Gates Acoustic Services was tasked by University of Alaska, Fairbanks, to investigate and quantify acoustic issues associated with operation of the R/V SIKULIAQ. An at-sea investigation was accomplished during ship operations in deep water out of San Juan, Puerto Rico on September 12-18, 2014.

Kilo Moana 2012 Acoustic Test Report

KILO MOANA’s acoustic signature was higher than previous acoustical data due to electronic noise interference. The levels in the EM 122 sonar operational frequency of 12 kHz were also higher than historic data. A significant problem was noted with numerous elements of the EM 122 sonar array that is believed to be associated with electronic background noise. Electronic noise was determined to be the major deficiency during this acoustic trial.

Kilo Moana 2010 Acoustic Test Report

KILO MOANA’s acoustic signature was comparable to previous acoustical data with one noted exception. The levels in the EM 122 sonar operational frequency of 12 kHz were similar to historic data. A new problem was discovered that was associated with engine and switching room air handler cooling systems. This problem created 4,000 Hz harmonics from the fundamental up through 80 kHz (the limit of onboard instrumentation). An additional problem was noted with numerous elements of the EM 122 sonar array that is believed to be associated with electronic background noise.

Melville 2012 Acoustic Test Report

R/V MELVILLE acoustic signature was successfully measured during this acoustic test. The levels of the EM 122 were controlled by a combination of propeller and anti-roll tank transients.

The general acoustic levels of MELVILLE were good and should produce excellent bathymetric data results:

  • At low speeds (up to 8 knots) sonar levels were controlled by a combination of sea-state and local machinery
  • At mid speeds (8 to 10 knots) sonar levels were controlled by hydrodynamic flow noise

 

Atlantis 2011 Acoustic Test Report

The acoustic signature of R/V ATLANTIS was successfully measured during this acoustic test. The levels of the EM 122 were controlled by a combination of flow noise and gondola cavitation. Higher sea state data was also influenced by bubble sweepdown effects.

The general acoustic levels of ATLANTIS with the new gondola mounted EM 122 sonar system were good and should produce excellent bathymetric data results:

  • At low speeds (from DIW to 350 RPM), sonar levels were controlled by a combination of sea‐state and local machinery.

 

Langseth 2011 Acoustic Test Report

R/V MARCUS G. LANGSETH’s acoustic signature was successfully measured during this acoustic test. The levels of the EM 122 were controlled by propeller cavitation. The quietest vessel condition/speed was when the controllable pitch propellers were set to 85 percent pitch with an engine speed of 600 RPM. This yielded a ship speed of 10 knots and a sonar level of 52 dB. The seismic system created high levels when it was operating.

SAT

2018 Okeanos Explorer EM302 SAT

Multibeam System:

EM302

CruiseID:

EX1810

The primary RX array SAT activities included:

  • 2018-10-02: depart Quonset, RI
  • EM302 TX and RX array survey review
  • EM302 and POS MV geometry / config. review
  • EM302 start-up (by Kongsberg) and BISTs
  • Geometric calibration and verification (‘patch test’)
  • Deep roll verification
  • Deep accuracy testing
  • Swath extinction data collection during transits (including after SAT portion of EX1810)
  • EM302 RX noise vs. speed testing (2018-10-24)
  • 2018-10-05: return Pt. Judith, RI for personnel transfer

 

2020 Okeanos Explorer EM304 SAT

CruiseID:

EX2000

Summary

  1. The Okeanos Explorer received a Kongsberg EM304 multibeam echosounder topside upgrade over the 2019-20 winter maintenance period. No changes were made to the TX or RX arrays (installed in 2007 and 2018, respectively) or the Applanix POS MV positioning and attitude system.
  2. Sea acceptance testing (SAT) was conducted during EX2000 (March 3-8, 2020) with Kongsberg, NOAA, and OMAO personnel on board to complete the following procedures:
    • Review EM304 and POS MV system geometry

Vessel Geometry and MBES Offset Recommendations

Vessel survey reports (VSRs) play a critical role throughout service life (10+ years) of a multibeam echosounder system (MBES) and provide the foundation for future vessel and sensor surveys. This document provides recommendations for VSRs that minimize opportunity for errors in the configuration of MBES and ancillary sensors.

NOAA Ship Ruben Lasker ME70 Integration Testing

Executive Summary

The purpose of Coast Survey’s participation in this cruise was to verify the installation and configuration of the ME70 and ancillary systems; validate the current Hypack implementation of the ME70 bottom detection code; and provide operational guidance to the future operators of this system. The transit from San Diego, CA to Neah Bay, WA offered an opportunity to test this system without interfering with other planned science objectives. While we have used the Multibeam Sonar Acceptance Procedures as

2018 Thompson EM302 SAT Report

Multibeam System:

EM302

CruiseID:

TN347

Conducted January 8-12, 2018 to test the new Kongsberg EM302 (upgraded from EM300) and Applanix POS MV V5.

NOAA Ship Fairweather Launch 2017 SAT

Executive Summary

We installed four Kongsberg EM2040 multibeam echo sounders, one on each of Fairweather’s
hydrographic survey launches during the spring of 2017 in Newport, OR. We accomplished the test and
qualification of these systems on Puget Sound from May 22 through May 26. Conditions were generally agreeable for testing with some wind driven chop potentially affecting a limited set of noise tests. All systems were successfully integrated and measured performance was in compliance with vendor specifications and suitable for conducting NOAA hydrographic surveys.

2016 Neil Armstrong Sea Acceptance Trails

Multibeam System:

EM122

EM710

The R/V Neil Armstrong is a new vessel operated by Woods Hole Oceanographic Institute (WHOI) equipped with Kongsberg Maritime (KM) EM122 (12 kHz) and EM710 (70-100 kHz) multibeam echosounders. The hardware installation, calibration, software configuration, and performance of these systems were evaluated during a sea acceptance trial involving WHOI, KM, Multibeam Advisory Committee (MAC), and NOAA Office of Coast Survey personnel.

NOAA Ship Thomas Jefferson 2016 SAT

Executive Summary

A Kongsberg EM2040 multibeam and an EM710 MKII multibeam were installed aboard NOAA Ship Thomas Jefferson during an extended shipyard period at the Coast Guard yard in Curtis Bay in Baltimore, MD during the spring and summer of 2016. After a short stay at the Atlantic Marine Operations Center in Norfolk, VA, the ship proceeded with acceptance testing of the new survey systems in the areas between Norfolk and Hudson Canyon during the third week of October, 2016, with the assistance of Office of Coast Survey and Kongsberg personnel.

 

Other

Assessment Tools

Multibeam echosounder assessment tools under development for public distribution to the ocean mapping community. Each tool is a standalone Python application (.exe), frozen with all required libraries using pyinstaller. Current development is focused on Kongsberg system performance and data formats, as used widely throughout the UNOLS and NOAA fleets. Supported by the NSF-funded Multibeam Advisory Committee and NOAA.

https://drive.google.com/drive/folders/1i6765f_Ga6J33L5kWuED7sVCuwf7q-fR…

Example tools:

Cookbook: IHO-IOC GEBCO Cookbook

GEBCO aims to provide the most authoritative publicly available bathymetric data sets for the world’s oceans. In order to assist and encourage further participation in bathymetric grid development work, GEBCO has created a technical reference manual, the IHO-IOC GEBCO Cook Book, on how to build bathymetric grids. The IHO-IOC GEBCO Cook Book includes input from a number of individuals and organizations, all of whom are experts in their respective fields. It is aimed to update and extend the IHO-IOC GEBCO Cook Book with new contributions as they become available.