Related Manuals for Marine Magnetics SeaSPY2
Summary of Contents for Marine Magnetics SeaSPY2
- Page 1 SeaSPY2 Gradiometers Quick Start Guide Rev. 2024-08 Marine Magnetics Corp Tel: +1 905 479-9727 fax: 905 479-9484 135 SPY Court Email: support@marinemagnetics.com Markham, ON URL: www.marinemagnetics.com L3R 5H6 Canada...
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Page 2: Table Of Contents
Gradiometer Frame Assembly .................................. 7 Operating the SeaSPY2 gradiometer system using BOB Software ......................9 Create a new survey and select the appropriate magnetometer type: SeaSPY2 Gradiometer ............9 Connect to the survey GPS via COM port............................10 Layback distance estimation for optimal magnetometer positions ....................11 Connect to the Magnetometer via COM port. -
Page 3: Introduction
Figure 1-1 – SeaSPY2 Horizontal Transverse Gradiometer assembly Each SeaSPY2 magnetometer may be equipped with a 200 kHz single-beam echo sounder altimeter. When two SeaSPY2 units are used as a pair, one of the SeaSPYs must be oriented such that its altimeter transducer points sideways or upwards to prevent mutual interference. -
Page 4: System Components
8-N-1 (8 data bits, No parity, 1 stop bit) Communication is full-duplex. Any commands that are sent to the SeaSPY2 while it is transmitting will not disrupt the transmission. When using the supplied USB cable, the transceiver’s integrated RS232-USB converter is used, which emulates a virtual COM port with the same settings. -
Page 5: Gps-Enabled Isolation Transceiver
GPS-Enabled Isolation Transceiver Since 2023 all Marine Magnetics Isolation Transceivers contain an integrated GPS receiver, which enables automatic sync between the magnetometer system and GPS/UTC time. A dedicated LED on the top cover indicates whenever GPS lock/fix is obtained. And internal battery-powered clock in the transceiver maintains the correct time for several days after a successful GPS sync. -
Page 6: Transceiver Gradiometer Mode
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Transceiver Gradiometer Mode The Isolation Transceiver needs to be configured to work in Gradiometer Mode in order to interface with SeaSPY gradiometers. When in gradiometer mode, the transceiver does not distinguish between the transverse and longitudinal arrangements for the purpose of communication, but always refers to the two units as Forward/FT or Rear /RT, based on the unit serial numbers configured when setting up the gradiometer mode. -
Page 7: Gradiometer Unit Naming Convention
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Gradiometer unit naming convention The communication interface for both transverse and longitudinal gradiometers is handled by the Gradiometer Mode in the Isolation Transceiver. The Transceiver does not distinguish between the transverse and longitudinal arrangements for the purpose of communication, and always refers to the two units as Forward/FT or Rear /RT, based on the unit serial numbers configured when setting up the gradiometer mode. -
Page 8: Gradiometer Frame Assembly
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Gradiometer Frame Assembly The horizontal transverse gradiometer assembly involves installing the SeaSPY magnetometers into the frame collars, aligning both SeaSPY to be at the same position relative to the frame, aligning the altimeter transducers (one to point downward, and the other to point toward the outside, or upward), and tightening the clamps (do not over-tighten!) The frame is symmetrical and does not have a preferred forward orientation. - Page 9 SeaSPY2 Horizontal Gradiometer - Quick Start Guide The depth to which the SeaSPY gradiometer will sink when being towed through the water is controlled by the following factors: Length of the tow cable deployed Towing speed Position of the SeaSPY relative to the frame (forward / back) Weight of the tow cable (cable weights 3-10 kg can be used, positioned 10-30m ahead of the towfish).
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Page 10: Operating The Seaspy2 Gradiometer System Using Bob Software
Operating the SeaSPY2 gradiometer system using BOB Software Marine Magnetics BOB is the magnetometer interface software that provide data logging, survey planning and data corrections for all Marine Magnetics products. Additional processing and data visualization features can also be activated using the BOB Analytic Module (BAM) license. -
Page 11: Connect To The Survey Gps Via Com Port
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Connect to the survey GPS via COM port. BOB supports RS-232 or USB (virtual COM port) GPS to capture vessel position data during the survey, and uses the layback offset to estimate the position of the towfish behind the vessel. -
Page 12: Layback Distance Estimation For Optimal Magnetometer Positions
(sensor location) amounts to 8.5m when the Y-split adapter cable is used with the gradiometer frame. When a single SeaSPY2 towfish is used without the Y-split adapter cable, the total magnetometer offset is 6m. -
Page 13: Connect To The Magnetometer Via Com Port
Figure 5-3 - Typical data output of a 2-node SeaSPY2 system during start-up SeaSPY2 magnetometers will display a power-up header upon start-up, and may begin sending data readings automatically if sampling was enabled prior to the SeaSPY being last disconnected. Otherwise sampling needs to be stated by the operator. - Page 14 SeaSPY2 Horizontal Gradiometer - Quick Start Guide Figure 5-4 - Configuring unit serials numbers in GRAD mode using the command terminal...
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Page 15: Checking Auto-Tuning And Long Deflect Settings For Gradiometers
Deflect setting for either Front (FT:) or Rear (RT:) towfish, before switching back to GRAD mode to verify that the settings are now identical between the two units. For additional details on the Long deflect feature, please refer to the SeaSPY2 Operating manual. -
Page 16: Finalizing The Configuration In Bob Setup Assistant
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Finalizing the configuration in BOB Setup Assistant The final step 4 in BOB Setup Assistant presents a summary of the survey parameters and COM port connections, and offers options for time synchronization source for the magnetometer towfish. -
Page 17: Magnetometer Data Display In Bob
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Magnetometer data display in BOB BOB user interface is divided into two windows: Main BOB window containing the sensor profile graphs and a readings table below, and the GeoPlot window displaying the location of the survey equipment in a map view. -
Page 18: Real-Time And Review Panes Of The Profile Plot
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Real-time and Review panes of the Profile Plot The Profile Plot window in BOB contains a vertical divider that can be used to split the view into Review pane (left) and Real-Time Readings pane (right). -
Page 19: Calibrating The Depth Sensor Zero Level
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Calibrating the depth sensor zero level Calibrating the zero-depth level of the pressure sensor should be done at the start of each survey, after allowing the magnetometer towfish to adjust to the water temperature and then bringing it out of the water to set the zero depth level. -
Page 20: Saving And Exporting Survey Data
SeaSPY2 Horizontal Gradiometer - Quick Start Guide Saving and exporting survey data All data collected by BOB are always stored in the BOB survey database whenever sampling is enabled. The database is stored internally and cannot be directly accessed, but it can be backed up to a file for archiving or exported in CSV format for processing in 3 party software. -
Page 21: Troubleshooting
If you are not able to communicate with the isolation transceiver (integrated into the side scan integration cable), check the baud rate and the power supply. For additional support, please do not hesitate to contact Marine Magnetics and we will be happy to assist you! Contact Us:...
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