GAPS
-
User Guide
14
Bit 0
1
Reserved
Bits 3 to 1
3
Minor axe XY: small axe (in m) of the error ellipse representing the
standard deviation of the position in the XY plane
000: 0 m < standard deviation < 0,5 m
001: 0,5 m < standard deviation < 1,5 m
010: 1,5 m < standard deviation < 3 m
011: 3 m < standard deviation < 6 m
100: 6 m < standard deviation < 12 m
101: 12 m < standard deviation < 25 m
110: 25 m < standard deviation < 50 m
111: standard deviation > 50 m
Bits 7 to 4
4
Angle between the North
and the major axle of the
XY error ellipse l
180/2
4
0°
15/16x180°
15
Bit 0
1
Reserved
Bits 3 to 1
3
Standard deviation of the Z(m) position
000: 0 m < standard deviation < 0,5 m
001: 0,5 m < standard deviation < 1,5 m
010: 1,5 m < standard deviation < 3 m
011: 3 m < standard deviation < 6 m
100: 6 m < standard deviation < 12 m
101: 12 m < standard deviation < 25 m
110: 25 m < standard deviation < 50 m
111: standard deviation > 50 m
Bits 7 to 4
4
Reserved
16
PP
hex
8
Reserved
17, 18
19
rrrrrrrrrrrrrrrrrrrrrr
bin
(8+8+6 bits of:
- byte 17,
- byte 18,
- bits 5 to 0 of 19)
22
It is the truncation of the
absolute time procided by
the GPS to the USBL-BOX,
keeping only the minutes,
seconds, and milliseconds.
It is coded in milliseconds
number.
1 ms
0 ms
(3 599 999 ms,
i.e. 1h - 1ms
The
largest
values of this
field
do
not
have
any
meaning
Bits 7 and 6 of 19
2
Reserved
20
KK
hex
8
Status byte, Bits 0 to 8 - Reserved
21
SS
hex
8
Checksum
exclusive OR by byte for the whole 20 first bytes thus header included.
Immersion
definition
The immersion corresponds to the mobile depth with respect to the mean sea level (thus
heave corrected). This data is coherent with the one that would be given by a depth sensor on
the underwater mobile. But it does not allow to deduce the absolute position as there is no
compensation for tide.
212
MU-GAPS-AN-005-H - November 2019
Содержание GAPS
Страница 1: ...GAPS Positioning System User Guide...
Страница 2: ......
Страница 22: ...GAPS User Guide Figure 7 HiSys hoisting system 22 MU GAPS AN 005 H November 2019...
Страница 112: ...GAPS User Guide Figure 52 Mobile properties window 112 MU GAPS AN 005 H November 2019...
Страница 228: ...PAGE INTENTIONALLY LEFT BLANK 228 MU GAPS AN 005 H November 2019 GAPS User Guide...
Страница 229: ...GAPS User Guide L GAPS Antenna Mechanical Drawing MU GAPS AN 005 H November 2019 229...
Страница 230: ...GAPS User Guide M Main Cable Repeater Box Mechanical Drawing 230 MU GAPS AN 005 H November 2019...
Страница 231: ...GAPS User Guide N GAPS BOX Mechanical Drawing MU GAPS AN 005 H November 2019 231...
Страница 232: ...GAPS User Guide O Rackable GAPS BOX Mechanical Drawing 232 MU GAPS AN 005 H November 2019...
