October 2017 RiverPro and RioPro ADCP Guide
Page 162
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
to do this. At some further depth cell, the RiverPro/RioPro rejects all cell data because of the weak echo.
As an example, let us assume depth cell 60 has returned the following percent-good data.
FIELD #1 = 50, FIELD #2 = 5, FIELD #3 = 0, FIELD #4 = 45
If the EX-command was set to collect velocities in BEAM coordinates, the example values show the per-
centage of pings having good solutions in cell 60 for each beam based on the Low Correlation Threshold
(WC-command). Here, beam 1=50%, beam 2=5%, beam 3=0%, and beam 4=45%. These are not typical
nor desired percentages. Typically, all four beams should be about equal and greater than 25%.
On the other hand, if velocities were collected in INSTRUMENT, SHIP, or EARTH coordinates, the exam-
ple values show:
FIELD 1 – Percentage of good 3-beam solutions – Shows percentage of successful velocity calculations
(50%) using 3-beam solutions.
FIELD 2 – Percentage of transformations rejected – Shows percent of error velocity (5%) that was higher
than the WE-command setting. WE has a default of 5000 mm/s. This large WE setting effectively pre-
vents the RiverPro/RioPro from rejecting data based on error velocity.
FIELD 3 – Percentage of more than one beam bad in bin – 0% of the velocity data were rejected because
not enough beams had good data.
FIELD 4 – Percentage of good 4-beam solutions – 45% of the velocity data collected during the ensemble
for depth cell 60 were calculated using four beams.
Table 31: Surface Percent-Good Data Format
Hex Digit Binary
Byte
Field Description
1-4 1,2 ID Code Stores the surface layer percent-good data identification word (10 04h).
5,6 3 Depth cell 1, Field 1 Stores percent-good data for depth cell #1, field 1. See above.
7,8 4 Depth cell 1, Field 2 Stores percent-good data for depth cell #1, field 2. See above.
9,10 5 Depth cell 1, Field 3 Stores percent-good data for depth cell #1, field 3. See above.
11,12 6 Depth cell 1, Field 4 Stores percent-good data for depth cell #1, field 4. See above.
13-44 7-22 Depth cell 2 – 5 (if
used)
These fields store percent-good data for surface layer depth cells 2 through 5 (de-
pending on measurement conditions), following the same format as listed above for
depth cell 1.
Table 32: Surface Status Data Format
Hex Digit Binary
Byte
Field Description
1-4 1,2 ID Code Stores the surface status data identification word (10 05h).
5,6 3 Depth cell 1, Field 1 Stores status data for depth cell #1, field 1. 1=good, 0=bad
7,8 4 Depth cell 1, Field 2 Stores status data for depth cell #1, field 2. 1=good, 0=bad
9,10 5 Depth cell 1, Field 3 Stores status data for depth cell #1, field 3. 1=good, 0=bad
11,12 6 Depth cell 1, Field 4 Stores status data for depth cell #1, field 4. 1=good, 0=bad
13-44 7-22 Depth cell 2 – 5 (if
used)
These fields store status data for depth cells 2 through 5, following the same format
as listed above for depth cell 1.
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