Teledyne RD Instruments SENTINEL V REAL-TIME, Руководство по эксплуатации

Страница: 231 / 343

Sentinel V SC and RT Operation Manual
September
2017
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 215
EX – Coordinate Transformation
Purpose Sets the coordinate transformation processing flags.
Format EXxxptb
Range xx = Transformation
p = Pitch and Roll
t = 3 beam solutions
b = Bin mapping
Default EX11111
Recommended Setting. Set using Plan . The default setting for this command is recommended for most
applications.
Description EX sets firmware switches that control the coordinate transformation processing for veloc-
ity and percent-good data.
Table 28: Coordinate Transformation Processing Flags
Setting Description
EX00xxx No transformation. Radial beam coordinates, i.e., 1, 2, 3, 4. Heading/Pitch/Roll not applied.
EX01xxx Instrument coordinates. X, Y, Z vectors relative to the Sentinel V Real-Time. Heading/Pitch/Roll not
applied.
EX10xxx Ship coordinates (Note 1) X, Y, Z vectors relative to the ship. Heading not applied. EA-command
used, but not the EB-command. If Bit 3 of the EX-command is a 1, then Pitch/Roll applied.
EX11xxx Earth coordinates (Note 1) East, North, Vertical vectors relative to Earth. Heading applied. EA and
EB-commands used. If Bit 3 of the EX-command is a 1, then Pitch/Roll applied.
EXxx1xx Use tilts (pitch and roll) in transformation (see Note 2)
EXxxx1x Allows 3-beam solutions if one beam is below the correlation threshold set by WC
EXxxxx1 Allow bin mapping (see Note 4)
1. For ship and earth-coordinate transformations to work properly, set the Heading
Alignment (EA) and Heading Bias (EB) correctly. Also ensure that the tilt and heading sensors
are active (EZ).
2. Setting EX bit 3 (Use Tilts) to 0 collects tilt data without using it in the ship or earth-
coordinate transformations.
3. Each Sentinel V Real-Time uses its own beam calibration matrix to correct data for beam
pointing errors (e.g., if the beams erroneously point toward 21 degrees instead of 20
degrees). Correction is applied when the data are converted from beam coordinates to earth
coordinates. If beam-coordinate data is output, you will need to apply the beam corrections
yourself to obtain the best possible data.
4. TRDI outputs the Bin 1 position for a level system only. We do not adjust the bin 1 position,
or the cell sizes, for any tilt. Bin mapping attempts to combine data from sections of the
beams that are at the same depth in the water, and does not make any attempt to calculate
how that depth might change for a tilted system. The setting of the EX command has no
effect on the reported bin 1 distance or the cell size.