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USER MANUAL / MANUEL UTILISATEUR
Profile 1, time Surface is reached in tri-profile mode
Profile 2, time Surface is reached in tri-profile mode
Profile 3, time Surface is reached in tri-profile mode
All data are coded in absolute without offset gain factor except for:
•
internal pressure (5mbars resolution);
•
pressure sensor offset coded in two's complement from -128 to +127 cBars with a resoultion of 1 cBar;
•
voltage drop in dV (gap compared with 10V);
•
all hours are coded in tenth of hours.
The time of the float is coded on 3 bytes (hour + minutes + seconds), 1 byte per field.
6.6. Life Expiry Message
Life expiry mode occurs at the end of mission once all the programmed cycles are performed and the
corresponding data transmitted. This mode enables to obtain a regular position of the float for an eventual
recovery. Taking into account the significant cost of Iridium packets, the following has been decided:
•
Technical packets will be transmitted by default every 6 hours. The transmission period at life expiry is
a technical parameter (PT30) expressed in hours.
•
The Iridium communication phase at life expiry will include a reception phase enabling to process the
commands via downlink.
•
If the float must be recovered, a command can be sent to update the transmission period and to obtain
a GPS position more frequently.
6.7. Sending message via downlink
Sending command via downlink is restricted to one PM! command (write in capitals) by e-mail (max. 20
bytes length).
For e-mails configuration, refer to
Thanks to a syntax control command, any incorrect syntax is rejected; this is to avoid the destruction of float
if an incorrect value of a mission parameter is positioned.
The mission parameters are bordered to avoid that any mistakes may destroy the float.
The min. and max. values of mission parameters are the following:
Mission parameters
PM0
PM1
PM2
PM3
PM4
PM5
PM6
PM7
PM8
PM9
PM10
PROVBIO-B
DATA
Tri-profile option
Table 2: Technical message
AN2005-07-V3.3.0 from NAL
Min. value
0
0
0
0
0
0
0
0
0
0
0
PAGE : 25 / 72
DATE : 26/03/2008
INDEX : A
REF. : DOC08018
FORMAT (Bytes)
Research,
section 11. ANNEX page
Max. value
300
20
365
23
1440
32768
240
240
1000
1000
12
1
1
1
1
33.
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