WorkHorse H-ADCP Operation Manual
May
2015
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 199
Some data outputs are in bytes per depth cell. For example, if the WN-command (number of depth cells)
= 30 (default), WD command = WD 111 100 000 (default), WP command > 0, BP command > 0, the re-
quired data buffer storage space is 841 bytes per ensemble.
There are seven data types output for this example: Fixed Leader, Variable Leader, Velocity, Correlation
Magnitude, Echo Intensity, Percent Good, and Bottom Track.
20 BYTES OF HEADER DATA (6 + [2 x 7 Data Types])
59 BYTES OF FIXED LEADER DATA (FIXED)
65 BYTES OF VARIABLE LEADER DATA (FIXED)
242 BYTES OF VELOCITY DATA (2 + 8 x 30)
122 BYTES OF CORRELATION MAGNITUDE DATA (2 + 4 x 30)
122 BYTES OF ECHO INTENSITY (2 + 4 x 30)
122 BYTES OF PERCENT-GOOD DATA (2 + 4 x 30)
85 BYTES OF BOTTOM TRACK DATA (FIXED)
2 BYTES OF RESERVED FOR TRDI USE (FIXED)
2 BYTES OF CHECKSUM DATA (FIXED)
841 BYTES OF DATA PER ENSEMBLE
Header Data Format
BIT POSITIONS
BYTE
7
6
5
4
3
2
1
0
1
HEADER ID (7Fh)
2
DATA SOURCE ID (7Fh)
3
NUMBER OF BYTES IN ENSEMBLE
LSB
4
MSB
5
SPARE
6
NUMBER OF DATA TYPES
7
OFFSET FOR DATA TYPE #1
LSB
8
MSB
9
OFFSET FOR DATA TYPE #2
LSB
10
MSB
11
OFFSET FOR DATA TYPE #3
LSB
12
MSB
↓
(SEQUENCE CONTINUES FOR UP TO N DATA TYPES)
↓
2N+5
OFFSET FOR DATA TYPE #N
LSB
2N+6
MSB
See Table 35 for a description of the fields.
Figure 47.
Binary Header Data Format