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Qinsy

Singlebeam Echosounder


Parent Item
System:List with all available singlebeam echosounder transducers that exist in the current selected Qinsy database
(see General Layout Information about loading a Qinsy database).
Notice that a singlebeam echosounder system may have more than one transducer defined.
Computation:

This option to select a computation is only needed for transducer node sub items (e.g. Td Easting, Td Northing, Td Height + Depth, etc)

  • The first entry is always [Priority List]
  • The rest of the list will show all available computations, as defined in the Computation Setup of the current Qinsy database.

Note that when the layout is used for Export (offline), you can not select entry [Priority List], you must select a 'real' computation from the list.
Sub ItemDescriptionValue TypeProperties
CommentUser-defined free texttext

Text Format:

  • Normal Text
    Your own free plain text
  • Binary
    Enter one or more ASCII character codes, comma or space separated, in the range between 1 and 127.
    For example '2' for a binary STX character, '3' for a binary ETX character, or '13, 10' for CR+LF.
    See table ASCII Codes for an overview of all possible characters.

  • New Line
    Same as Binary, but already formatted as '13, 10' (meaning CR+LF) and without a possible Field Delimiter.
    A Field Delimiter may be present when your layout purpose is for Export or ASCII Logging.

Name

Name of the Singlebeam Echsounder System (plus the Transducer label),
as defined in Database Setup

text
TimeTime of the last raw updatetime
Depth

Value depends on the Apply C-O property, so it will be the raw uncorrected depth value as decoded by the driver, or the depth below the transducer (aka watercolumn, or distance between transducer and seabed)

double

Apply C-O:

  • No: Raw Depth
    The depth value will be the uncorrected value as reported by the echosounder unit.
  • Yes: Depth below Transducer
    The depth value will be corrected with a 'sound velocity' scale-factor derived from the values as entered in Db Setup, and corrected for draft.
    The draft correction settings are also defined in the system setup in Database Setup.
    Corrected Depth = (Raw Depth + Echosounder Draft Correction) * Calibrated Velocity / Used Velocity
Age

The difference between the triggering time and the time of the last raw update (see above). Normally always a positive value in seconds.

The calculation of the age value while exporting differs from an online situation:

It will be the difference between the time of the current observation and the previous one.

Formula:

  • Online (Display, Driver, Log File): Age = Triggering time - Observation time
  • Offline (Export): Age = Observation time - Previous observation time

double

Sound VelocityThe sound velocity value, as entered in Database Setup. Which one, depends on the Apply C-O setting.double

Apply C-O:

  • No
    Used velocity
  • Yes
    Calibrated velocity
Draft Correction
This will be the value as determined by the Database Setup system setup setting 'Echosounder Draft Correction':
  • Unchecked
    Value will be zero.
    This scenario implies that there is no draft value entered in the echosounder unit.
  • Correction derived from node offsets
    Value will be the transducer node z-offset (database setup) minus the vessel (object) draft (Computation Setup) and the Height above draft reference (database setup).
    This scenario implies that the node z offset and the online vessel draft value is also entered in the echosounder unit.
  • Enter manually
    Value will be the manually entered value in the database setup.
    This scenario implies that the manually entered value is also entered in the echosounder unit.

This value has an opposite sign because it is not the draft but the draft correction

double

Ping Number

Normally an increasing number.

This value is decoded from the header data, coming from the echosounder system itself.

int
Quality  Same quality as seen in Observation Physics Displaydouble

Td Name

The name of the node, as defined in Database Setup.
This node is selected as transducer in the echosounder system setup on the 2nd wizard page.

text
Td EastingThe easting of the transducer node, as calculated by the selected computation. The easting is always on Survey Datum.double

Td NorthingThe northing of the transducer node, as calculated by the selected computation. The northing is always on Survey Datum.double

Td LatitudeThe latitude of the transducer node, as calculated by the selected computation. Latitude is default on Survey Datum, but WGS84 (or ITRF2008) can also be selected.geo

Datum:

  • Survey Datum (default)
  • WGS84
    Assumption is that the WGS84 (or ITRF2008) datum must be part of the Geodetic Setting in DB Setup

Td Longitude

The longitude of the transducer node, as calculated by the selected computation. Longitude is default on Survey Datum, but WGS84 (or ITRF2008) can also be selected.

geo


Datum:

  • Survey Datum (default)
  • WGS84
    Assumption is that the WGS84 (or ITRF2008) datum must be part of the Geodetic Setting in DB Setup

Td Height

The height of the transducer node, as calculated by the selected computation.
Height is by default on Chart Datum, but Survey Datum, WGS84 (or ITRF2008), the Actual Water Level, the Mean Water Level, or the Geoid Model Level may be selected.

double

Datum:

  • Survey Datum
    Height value will be on the selected survey datum ellipsoid, e.g ED50.
    Survey datum (or Horizontal Datum) is set in the Geodetic Configuration as Project CRS. (CRS = Coordinate Reference System)
  • WGS84
    Height value on the WGS'84 datum.
    Note that WGS84 (or ITRF2008) must be one of the two selected CRS's in the Geodetic Configuration.
  • Chart Datum (default)
    Height value on the selected vertical datum e.g NAP, De Min Geoide.
    Chart Datum (or Vertical Datum) is set in the Geodetic configuration as Vertical CRS.
  • Actual Water Level
    Height value above the actual water (or sea) level.
    The following formula is used: Geoid Level + Tide + Swell
    The swell is derived from the roll, pitch and heave of the reference node, and the offset of the selected node to the reference node.
    The heave value of the reference node can be monitored under the heave column of the Height Aiding driver.
  • Mean Water Level
    Height value above 'mean' water (or sea) level.
    The following formula is used: Geoid Model + Level Model + Offset
  • Geoid Model Level
    Height value above input geoid model. Only used in case of river height model

Td Height + Depth

A combination of the transducer height (on Chart Datum), and the raw/corrected depth value.

Note that this value is not as accurate as the final DTM Results (actual calculated footprint value, using e.g. SVP ray tracing, etc.) but it gives a good indication of the current depth.

double

Apply C-O:

  • No
    The depth value used will be the raw value as reported by the echosounder unit.
  • Yes
     The depth value will be corrected with a 'sound velocity' scale-factor derived from the values as entered in Database Setup, and corrected for draft. The draft correction settings are also defined in the system setup in Database Setup
    Corrected Depth = Depth * Calibrated Velocity / Used Velocity + Draft Correction (from Td Node offset, or from manual value)
Td Z Offset
The vertical offset of the transducer node from the object reference point as defined in the database setup.
A negative value means that the transducer node is below the object reference point.
double