GAPS - User Guide
I.15 IXSEA USBL INS 2
Message $PXUI2,id,lat,lon,imm,maj,min,ang,dev,tim*CK
Field 1 Transponder ID
Field 2 Latitude (deg) Resolution: 180/232
Domain: [-90 .. 90 x (1-232)]
Field 3 longitude (deg) Resolution: 360/232
Domain: [-90 .. 360 x (1-232)]
Field 4 Immersion (m) Resolution: 0,01 m
Domain: [0 .. +10485,75]
Field 5 Major axe XY (m)
Long axe of the error ellipse representing the
standard deviation on the position in the XY plane
0: 0 m < standard deviation < 0,5 m
1: 0,5 m < standard deviation < 1,5 m
2: 1,5 m < standard deviation < 3 m
3: 3 m < standard deviation < 6 m
4: 6 m < standard deviation < 12 m
5: 12 m < standard deviation < 25 m
6: 25 m < standard deviation < 50 m
7: standard deviation > 50 m
Field 6 Minor axe XY (m)
Small axe of the error ellipse representing the
standard deviation of the position in the XY plane
0: 0 m < standard deviation < 0,5 m
1: 0,5 m < standard deviation < 1,5 m
2: 1,5 m < standard deviation < 3 m
3: 3 m < standard deviation < 6 m
4: 6 m < standard deviation < 12 m
5: 12 m < standard deviation < 25 m
6: 25 m < standard deviation < 50 m
7: standard deviation > 50 m
Field 7 Angle between the North and the major axe of the
XY error ellipse
Resolution: 180/24
Domain: [0 .. 15/16 x 180]
Field 8 Standard deviation of the Z(m) position 0: 0 m < standard deviation < 0,5 m
1: 0,5 m < standard deviation < 1,5 m
2: 1,5 m < standard deviation < 3 m
3: 3 m < standard deviation < 6 m
4: 6 m < standard deviation < 12 m
5: 12 m < standard deviation < 25 m
6: 25 m < standard deviation < 50 m
7: standard deviation > 50 m
Field 9 Truncation of the absolute time provided by the
GPS to the USBL-BOX, keeping only the minutes,
seconds, and milliseconds. It is coded in
milliseconds number.
Resolution: 1ms
Domain: [0 .. 3 599 999]
The largest values of this field do not have
any meaning
MU-GAPS-AN-005-H - November 2019 213
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