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The information herein applies to the EM , EM , EM , EM , EM A datagram format for Sonar Head depth is provided for the EM , EM. Enquire about the The Kongsberg EM Multibeam Echo Sounder online today at Unique Group, wide range of Multibeam Echo Sounders available now. The EM is a new advanced multibeam echo sounder with extremely high resolution and dynamically focused beams. It is very well suited for detailed.

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When Enabled the Raw original Bathymetry packets e.

D datagram for position of footprints C datagram to determine internal EM clock drift and offset. Decoding Notes Driver will always output the decoded maximum number of beams with a maximum ofEM In order to activate the transmission, one should do the following:.

The Kongsberg EM 3002 Multibeam Echo Sounder

Only the beam numbers are different. If you want to decode the backscatter, see the Simrad EMx for more details. F datagram for raw ranges and angles C datagram to identify the serial number from the main head R datagram for raw bathymetry storage as of QINSy version 8 the offset from the clock telegram is no longer used for the EM QINSy assumes the beam angle and the kongsberv to be valid at the acoustic center.

The Jongsberg driver will restore invalid beams, by resetting all values to 0, except for quality factor and intensity, which are set to the invalid values according to the EMx manual, i. If the driver is started without the parameter it will start by default in Rho-Theta mode. The clock datagram is used kongsbetg identify the main transducer head’s serial number and therefore the clock message longsberg always be activated. Important Driver will stop updating if no C clock datagrams are received for more than 30 seconds.

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Each head has beams starting with 1 at the port side of the matching transducer. This non-conformity will result in small depth independent depth errors at the outer beams.

Invalid beams are restored to the MBE data buffer, with all values set to 0, except quality factor FFh and intensity 7Fh. No real time sound velocity QINSy only supports beam angle corrections when a sound velocity probe is interfaced.

The drawing below shows a schematic overview of the acoustic center.

Kongsberg EM3002

Acoustic center is 2. DbSetup example for Simrad Compact system. Note that choosing the valid flank is not very relevant for very short PPS pulses e. Only use this mode if F datagrams are not available in the EM software version earlier versions.

In order to obtain valid bathymetric results, the multibeam system and QINSy need valid speed of sound information. The EM manuals will mention the acoustic center to be in the geometric center of the transducer face but this is not exactly true: This pulse is half a second long so when the wrong active kingsberg is chosen timing can be off by half a second. Choose one of the “Head II” systems to decode the beam data from the second transducer.

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In DbSetup for this driver some driver specific settings can be entered. The Acoustic center is the point for which the node position must be entered into the QINSy database. This echosounder uses pitch compensation and therefore it requires the serial input of an attitude sensor EM binary format.

When Enable the Water column data is decoded by the Driver.

In order to activate the transmission, one should do the following: These supersede the command line parameters. In order to be able to test the network connection it is advised to add a line to the ‘host’ file using:.

Kongsberg EM – Forum Energy Technologies

So for test purposes it is possible to use this driver without receiving the clock telegram but never use it like this operationally. The driver will correct the reported beam angles so they are valid for the acoustic center. It is important that the velocity entered is at transducer face depth when picking from a kontsberg.

In normal mode, the driver decodes the first beams from the telegrams, while with Head II option enabled, it decodes the second beams Only a limited number of packets will be stored: