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USER MANUAL / MANUEL UTILISATEUR
6.4. Packet P(t)
6.4.1. Format
To be able to reconstruct the float evolution, condensed pressure data are transmitted according to the time.
The content of the spy data of the cycle in progress is used to generate this packet. A cycle generates 1
packet of 140 bytes.
•
Type 9: P(t)
•
Doublet Pressure, time (P, t) 1
•
Doublet Pressure, time (P, t) 2
•
•
•
Doublet Pressure, time (P, t) n
6.4.2. Coding
P is coded into 8 bits on a range from 0 to 255 bars.
t is coded into 8 bits, in minutes, in relative according to the previous sample. The first sample of each
segment (descentP_drift, descentP_profile, ascent) is dated at 0; it is dated in absolute by the information
of the technical message.
6.5. Technical Message
For each complete set of CTD and optical messages sent, the technical message is sent once.
TECHNICAL INFORMATION: DESCENT TO DEPTH OF DRIFT
Descent, number of entrance in P_drift target range
TECHNICAL INFORMATION: DURING DRIFT
Number of hydraulic valve actions in re-positioning
TECHNICAL INFORMATION: DESCENT TO PPROFILE
Number of hydraulic valve actions during descent to profile
PROVBIO-B
DATA
DATA
Type: 0
Descent start time
Number of valve actions at the surface
st
1
float stabilization time
st
1
float stabilization pressure
Number of valve actions in descent
Number of pump actions in descent
Time of end of descent
Maximum pressure in descent to P_drift (bars
Minimum pressure in drift (bars)
Maximum pressure in drift (bars)
Grounding detected
Number of re-positioning
Number of pump actions in re-positioning
Descent start time to profile
PAGE : 22 / 72
DATE : 26/03/2008
INDEX : A
REF. : DOC08018
FORMAT (Bytes)
1
2
2
2
2
2
FORMAT (Bytes)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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