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.
