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July 2019 – TD 304 OPERATING MANUAL – Doppler Current Profiler Sensor
3.5.1
Site Info
Figure 3-16: Site Info
Site Info
containing four properties:
•
Location:
Name of location where the instrument is deployed.
•
Geographic Position:
GPS potion for deployment format Latitude, Longitude.
•
Vertical Position:
Position in water column, e.g. 5 meter depth.
•
Reference:
Free text for additional information.
All these settings are optional information to be entered to store information about the deployment. These setting are not
used in calculation.
Geographical Position
is used to give the map coordinates unless a GPS input is connected.
3.5.2
Orientation
Figure 3-17:Orientation
Enable Magnetic Declination
is normally used when sensor is used close to South Pole or North Pole.
Declination
Angle (Deg.M)
is a value to correct for the magnetic variation on the site where the sensor is used. This is the angle in
degrees between magnetic north and true north.
Magnetic declination (variation) is the angle between the magnetic
north and the true north. This angle varies depending on the position on the Earth’s surface and also varies over time.
Declination is positive when magnetic north is east of true north and negative when it is to the west (input angle value
±180°). Magnetic declination at the deployment location can be found for i.e. on NOAA website:
http://www.ngdc.noaa.gov/geomag-web/