Driver for Odom Echoscan Multibeam Echosounders using a serial cable connection.
The Odom Echoscan is a 30 beam Echosounder which uses so-called physical beamforming.
In fact it can be seen as a multi transducer echosounder with all it's transducers integrated in a single hull.
The raw bathymetry packets can optionally be stored in the database.
Such a database can afterwards be used to export the XTF records to a separate file.
However, using this option will create much larger databases.
Timetag from data packets is not used, instead the time of arrival of the first string is used in combination with the latency provided in the output message. The latency is typically identical to the ping interval.
The Checksum is ignored.
Decoded ranges are considered to be from one common acoustic centre in the middle of the transducer hull.
The decoded Quality Indicator (QI) can be interpreted as a figure with the following possible values:
Bad (= worst)
Low Signal Strength
Out of Sequence
Refer to Odom documentation for information about the acoustic center of the transducer.
Drivers Specific Settings
In Database Setup for this driver some driver specific settings can be entered. These supersede the command line parameters.
The following settings can be selected:
|Raw Bathymetry Storage*||Disabled/Enabled||When Enabled the Raw (original) ECHOSCAN packets are stored in the database for XTF export.|
*) The decoded raw data is also stored so enabling Raw Storage will lead to larger Database sizes.
When online, select the "Echosounder Settings" option from the "Settings" menu to define the online blocking and filtering of the multibeam echosounder data. Use a Raw Multibeam Display to show raw data and a Swath System Display to show the corrected scans.
To exclude invalid beam data from the result dtm's you can flag the beam based on the beam quality indicator value. Set for example the Echosounder settings "Exclude Data when - Quality outside" range from 3 to 3 to block beams that do not have a Quality of "Good".