Product Description
317748/F
55
-400
-200
0
200
400
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
CW
Cymbal
Sound velocity
HiPAP LBL horizontal accuracy. Waterdepth 3000m.
East co-ordinate relative to centre of LBL array
H
or
iz
on
ta
l
po
s
it
ion
e
rr
or
Figure 8 LBL position error in the horizontal plane as a function
of the East co-ordinate. The North co-ordinate is zero. The blue
lines show random error due to acoustics. Black line is
systematic error due to 1 m/s wrong sound velocity settings.
The blue lines in Figure 8 show the random error in the
horizontal position when the rig moves within a transponder
array with 4 transponders placed on a circle with 500 m radius at
water depth 3000 m. The lower line shows the expected error
when the Cymbal acoustics is used and the upper line when the
CW acoustics is used.
The black line shows the systematic error when the sound
velocity is set 1 m/s wrongly in APOS. This error is zero in the
centre of the array due to the symmetry. The LBL run time
calibration should be done when the rig is in the centre of the
array. Then the effect of a wrong sound velocity setting in
APOS is strongly reduced, as shown with the dotted black line.
Summary of Contents for HiPAP 101
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Page 29: ...Product Description 317748 F 21 Description Reg no ...
Page 74: ...HiPAP Model 501 451 351 101 66 317748 F Computer desktop mounting and outline dimensions ...
Page 80: ...HiPAP Model 501 451 351 101 72 317748 F DN 500 mounting flange w gate valve ...
