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July 2019 – TD 304 OPERATING MANUAL – Doppler Current Profiler Sensor
10 and
11
Binary: xxxx11xxxxxxxxxx
Hexadecimal: xCxx
Cell has High vertical current, above high vertical limit 3, default 30
cm/s
12
Binary: xxx1xxxxxxxxxxxx
Hexadecimal: 1xxx
Cell inside blanking zone
3)
13
Binary: xx1xxxxxxxxxxxxx
Hexadecimal: 2xxx
Cell inside illegible zone
4)
14
Binary: x1xxxxxxxxxxxxxx
Hexadecimal: 4xxx
Cell out of range
5)
15
Binary: 1xxxxxxxxxxxxxxx
Hexadecimal: 8xxx
Data not ready
1)
The cross correlation is normally close to 0.5, high limit is 0.6
2)
Indicates high single ping standard deviation on horizontal speed.. Narrowband and Broadband have different limits.
The limit input is set as single ping standard deviation per meter since it is dependent on the cell size (and pulse length).
The limits for Broadband are 10, 30 and 50 cm/s. The limits for narrowband are 60, 80 and 100 cm/s. These limits are
used for a 1 meter cell (and pulse). The standard deviation limits used are calculated from these as follows, SP Stdev
limit = SP Stdev per meter limit/sqrt(cellsize*pulselength). Broadband uses a fixed pulse length = 1m. In narrowband the
pulse length follows the column with the smallest cell size. If for example narrowband with 2m cell size and 2m pulse
length, the single ping standard deviation limits becomes 30, 40 and 50 cm/s.
3)
The cell can have been configured to be behind the instrument or very close to the instrument. This can also change
during the deployment dependent on water level changes and sensor tilt.
4)
The illegible zone: if surfaced referred column, approximately 10% of the distance from surface to the instrument is
contaminated by side lobes.
5)
Cells can have been configured to be too far away. Tilting of the instrument can also result in out of range on some of
the beam cells.
Table 5-7: Cell State2 (For SW version 8.3.6. and newer. For older version see previous version.)
Cell State2 bits
Meaning
Bit no
Bit pattern (x don’t care)
0
Binary: xxxxxxxxxxxxxxx1
Hexadecimal: xxx1
Beam1 cell inside blanking zone
1)
1
Binary: xxxxxxxxxxxxxx1x
Hexadecimal: xxx2
Beam2 cell inside blanking zone
1)
2
Binary: xxxxxxxxxxxxx1xx
Hexadecimal: xxx4
Beam3 cell inside blanking zone
1)
3
Binary: xxxxxxxxxxxx1xxx
Hexadecimal: xxx8
Beam4 cell inside blanking zone
1)
4
Binary: xxxxxxxxxxx1xxxx
Hexadecimal: xx1x
Beam1 cell out of range (too far away)
2)