QAT

There are 70 posts tagged QAT (this is page 1 of 7).

2025 R/V Sikuliaq EM304 MKII / EM710 QAT

Cruise ID: SKQ202503S Multibeam System: EM304 MK II/ EM710 Dates: February 3-6, 2025 In Feb 2024, UAF and MAC personnel conducted sea acceptance testing (SAT) of R/V Sikuliaq’s (SKQ) new EM304 MKII multibeam mapping system, Seapath 380-R3 navigation system, and EM710 RX array Seasonal readiness testing off Hawaii in Feb 2025 expanded on the 2024 SAT work with access to deeper seafloor regions, supporting a more complete characterization of EM304 MKII performance UAF and MAC personnel planned a series of tests following the standard MAC SAT/QAT checklist, with consideration for post-SAT priorities and backup options to suit the weather and sea state conditions Small but critical updates were made to all sensor XYZ offsets, reflecting the final survey report provided by Westlake (after the 2024 SAT) and maintaining consistency of the mapping system origin at the granite block Calibrations for both systems revealed small residual biases, suggesting a high-accuracy vessel
Continue Reading →

2024 R/V Healy EM122 QAT

Cruise ID: HLY24TE Multibeam System: EM122 Dates: August 13-14, 2024 Elevated sea state and corresponding bubble sweepdown issues severely impacted data quality during the initial calibration attempt on June 20; a second, successful attempt was carried out in calm water on Aug 13, 2024 The USCGC Healy (HLY) is equipped with a Kongsberg Maritime EM122 multibeam echosounder (1° TX x 2° RX) with Seapath 330+ (primary) and Applanix Oceanmaster POS MV (secondary) navigation systems The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s multibeam echosounder ahead of the 2024 field season; due to scheduling constraints, MAC personnel provided remote support for line planning and data analysis MAC communication with Healy and UCSD/STARC personnel (primarily Emily Shimada, Max Hughes, and Brendon Mendenhall) commenced in May 2024 with planning to effectively repeat the 2020-23 QATs off the coast of Washington, including: • calibrations (‘patch
Continue Reading →

2024 R/V Sally Ride EM712/EM124 QAT & Seapath 380-R3 SAT

Ship ID: R/V Sally Ride Multibeam System: EM712/EM124/Seapath 380-R3 Dates: April 3-5, 2024 R/V Sally Ride (SR) received an upgrade of its Seapath 330 navigation system to dual Seapath 380s The primary Seapath 380 employs a new Seapath MGC-R3 (“Seapath 380-R3”) and the secondary Seapath 380 uses the pre-existing MRU 5+ (“Seapath 380-5+”); both systems are logged by the EM124 and EM712 While no changes were made to the MRU 5+ installation, the original Seapath antenna locations were modified for a longer baseline and a second antenna pair was added; all Seapath antennas are NovAtel GNSS-850 units A new survey was conducted by Westlake Consultants to determine the installation offsets of the new MGC-R3 and new antenna locations using the existing reference frame (established by IMTEC during the 2021 SBP29 installation and EM124 topside upgrade) The Sally Ride conducted routine quality assurance testing (QAT) between April 3-5, 2023, focusing on:
Continue Reading →

2024 R/V Revelle EM712/EM124 QAT

Cruise ID: RR2401 Multibeam System: EM712/EM124 Dates: February 12, 2024 During the winter 2023-24 maintenance period, the R/V Roger Revelle (RR) underwent significant engine work and received a new Seapath 380 receiver and HMI (the MRU 5+ and antennas were not modified) The Multibeam Advisory Committee (MAC) was asked to assist with routine Quality Assurance Testing (QAT) for the ship’s multibeam echosounders; due to scheduling conflicts, the MAC provided remote support for planning and data analysis leading up to and throughout the QAT Planning followed the standard MAC SAT/QAT checklist, starting with configuration review, hardware health, and noise testing following the engine work; calibrations for both systems were carried out at proven sites near San Diego used by a variety of vessels (e.g., 2023 Sally Ride EM124 and EM712 QAT) Dockside configuration reviews indicated a rollback to outdated offsets for the EM124 (e.g., potentially by loading an older PU parameters
Continue Reading →

2024 R/V Sikuliaq EM304 MKII/EM710 SAT

Cruise ID: SKQ202403S Multibeam System: EM304 MKII/EM710 Dates: February 2024 R/V Sikuliaq (SKQ) received several significant upgrades to its multibeam mapping systems during the 2023-24 winter shipyard period in Seward, Alaska Conditions in the shipyard were extreme and complicated all work related to these upgrades; although many components of the winter work package were curtailed by these conditions, the UAF and Kongsberg teams completed all major mapping priority projects: Complete replacement of the original EM302 with an EM304 MKII system (0.5° TX / 1.0° RX) Addition of one Seapath 380-R3 navigation systems with a primary MGC serving the ship and mapping systems; a secondary MGC also serve the ship and acts as a spare for the Seapath 380 / mapping system Comprehensive new survey of vessel and sensor offsets by Westlake Consultants Installation of new permanent benchmarks at strategic hull locations Planned replacement of the EM710 RX array was not
Continue Reading →

2023 R/V Roger Revelle EM124/EM712 QAT

Cruise ID: RR2301 Multibeam System: EM124/EM712 Dates: February 4-19, 2023 R/V Roger Revelle (RR) underwent routine calibrations of the ship’s multibeam echosounders during an extended transit/cruise between Punta Arenas, Chile, and Cape Town, South Africa in February 2023; the MAC provided remote support for planning and data analysis leading up to and throughout the calibration Planning followed the standard MAC SAT/QAT checklist, focusing on calibrations at suitable sites within reasonable deviations along the transit route; these were completed in two phases with initial EM124 testing near Puntarenas, followed by EM124 re-calibration and EM712 calibration at suitable sites off Cape Town The initial EM124 calibration was completed with a TX array pitch error inadvertently held over from the 2020 EM124 and EM712 SAT; this was corrected for the second calibration, resulting in typically small adjustments During the approach to the second calibration area off Cape Town, an EM712 configuration error was
Continue Reading →

2023 R/V Healy EM122 QAT Report

Cruise ID: HLY23TAMultibeam System: EM122Dates: May 23 – July 13, 2023 The USCGC Healy (HLY) is equipped with a Kongsberg Maritime EM122 multibeam echosounder (1° TX x 2° RX) with Seapath 330+ (primary) and Applanix Oceanmaster POS MV (secondary) navigation systems The original EM122 RX array modules on USCGC Healy were found to be failing during recent impedance testing; these modules were replaced with lightly used units (donated from a NAVO vessel undergoing an EM124 upgrade) during the 2022-23 maintenance period at Mare Island Dry Dock in Vallejo, CA The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s multibeam echosounder and Sea Acceptance Testing (SAT) of the ‘new’ RX array ahead of the 2023 field season; due to scheduling constraints, MAC personnel provided remote support for line planning and data analysis Attached Documents Report: HEALY_2023_EM122_QAT_report_v1p0Download Related Information Vessel Data at R2R
Continue Reading →