Doc no: 430-041-01
27 of 64
Figure 4-6 [
sketch courtesy of A Godin]
The latency derived in Section 4.2.1 should be applied prior to any processing.
The inconsistencies in position of the feature / slope is as a result of an error in pitch alignment between MRU
and MBES head. During processing, a subset of the feature / slope along the most pronounced point at nadir
should be extracted and processed using the patch test utility in the MBES processing package.
The output of this process should be the pitch correction, that when applied would bring the feature / slope
points (on reciprocal headings) to the same spatial location.
It is recommended to repeat the exercise at a different speed (for example 6 knots), or at the very least define
another long profile within the previously used data set, including the same slope / feature. The same process
may now be repeated (several times if possible) and the average derived and applied.
The Surveyor should verify the sign of the pitch corrections. Hypack automatically corrects for the sign and
the reported pitch correction should be applied as is. Other patch test software may require an inversion of
the sign and the Surveyor must be aware of this.
4.2.3. Yaw
Two adjacent lines, run in the same direction and on each side of a conspicuous topographic feature with
line spacing such that there is overlap between adjacent data.
Summary of Contents for DT101Xi
Page 35: ...Doc no 430 041 01 35 of 64 APPENDIX A DT101Xi DT102Xi SPEC SHEETS DT101Xi...
Page 36: ...Doc no 430 041 01 36 of 64...
Page 37: ...Doc no 430 041 01 37 of 64...
Page 38: ...Doc no 430 041 01 38 of 64...
Page 39: ...Doc no 430 041 01 39 of 64 DT102Xi...
Page 40: ...Doc no 430 041 01 40 of 64...
Page 41: ...Doc no 430 041 01 41 of 64...
Page 42: ...Doc no 430 041 01 42 of 64...
Page 52: ...Doc no 430 041 01 52 of 64 Figure 6 7 Jumpers for Heading and PPS Selection...
Page 56: ...Doc no 430 041 01 56 of 64 Figure 6 8 Power Supply Voltage Option...