SonTek
ADP Software Manual Version 6.42 (November 1, 2000)
8
Coordinate system: (Multiple-choice)
This determines the coordinate system in which velocity data are displayed and stored. BEAM
gives velocity data as along-beam velocities (not common). XYZ gives velocity data in a
Cartesian coordinate system relative to ADP orientation (see the ADP Operation Manual). ENU
(for East-North-Up) reports data in an instrument independent Earth coordinate system; this
option requires that the ADP have the optional compass/tilt sensor installed. When configuring
the ADP, be certain that “Sensor Orientation” is correctly set in the hardware configuration, as
this will affect the reporting of velocity data in either the XYZ or ENU coordinate system. For
most applications, the ENU coordinate system is preferred.
Sensor Mounting Depth (m): (Enter value)
This sets the depth at which the ADP is mounted (at the level of the transducer faces). This value
is for display purposes to determine the depth of each cell.
Magnetic Variation (deg): (Enter value)
The difference between magnetic north and true north, expressed as degrees east of true. Thus a
value of 10.0 indicates magnetic north is 10° east of true north, where as a value of -10.0
indicates that magnetic north is 10° west of true north. This value is for display purposes only
when using the ENU (East-North-Up) coordinate system; display velocities are rotated to
represent true north. The data stored in binary files are always referenced to magnetic north when
using the ENU coordinate system.
NOTE: in order to obtain up to date magnetic variation (declination) for your specific
location use utility MAGDECL (see SECTION 7) provided with the ADP software package.
Bottom Track (Yes or No):
Enables disables the Bottom Tracking mode.
Record Pressure Series (value) (Enter value)
Controls Collection/Recording of the Pressure Series data. When RPS=N (N>0) is entered the
pressure data will be collected every N profiles (note, that the time between successive pressure
records will be N×PRI, where PRI is profiling interval in s). If N=0 is specified, no pressure data
is collected.
Pressure Series Length (samples) (Enter value)
Sets the length of the pressure time series (in samples). The PSL should fall in the range between
1 and 8192 samples. The length of the pressure series in seconds equals PSL/PSR.). Because the
wave extraction software uses 256-second data segments it is recommended that the PSL is a
multiple of that number. For more accurate wave parameter estimation we also recommend the
minimum pressure series length of 1024 seconds. However the user may choose smaller values if
desired.
Pressure Series Rate (Hz) (Enter value)
Specifies the sampling rate for the pressure time series collection (can be set to only 1, 2 or 4
Hz).
Record To File: (Enter filename)
This item assigns a file for recording ADP data. Several checks have been incorporated to insure
that a valid filename is given, the file can be created, and that an existing file is not accidentally
overwritten.
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