Het onderwerp wordt door Nicolàs de Hilster, Starmountain Survey & Consultancy, belicht. Hoe is de aandacht voor kalibratie en scheepsgeometrie in de loop van de jaren gegroeid?
TrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
Kalibratie en scheepsgeometrie met een historisch perspectief
1. N. de Hilster
HSB Workshop Vessel Geometry and Calibrations
15 January 2014
Vessel Geometry and Calibrations:
a historical perspective
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
1/17
2. 1980s
Positional accuracy ~ 1 metre
2D Vessel Geometry
MRU only for heave
Tape measurements
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
2/17
3. February 1953: Watersnoodramp
Flooding large parts of ZuidHolland, Zeeland and Noord-Brabant
Also affected Great Britain, Belgium
and Germany
Some 2400 casualties around and on
the North Sea
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
3/17
4. Two major projects:
Great Britain: Thames Barrier
The Netherlands: Delta Works
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
4/17
5. Surveying the Storm Surge Barrier
Tide reduction not possible
First 3D dynamic positioning system:
the AGA/Minilir
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
5/17
6. Surveying survey vessels
First surveyed hydrographic vessels:
mv. Scholekster
mv. Houtvliet
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
6/17
7. Surveying survey vessels
mv. Scholekster
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
7/17
8. Surveying vessels
Delta works construction vessels
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
8/17
9. Surveying survey vessels
1989: First multibeam vessel:
mv. Christaan Brunings (EM100)
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
9/17
10. Surveying vessels: equipment
1990s: Introduction of KART
2000: Introduction of PHINS
2001: Introduction of LRK
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
10/17
11. Surveying vessels: Literature
J.J. Knol, “Maatvoering aan onder helling
opgestelde objekten en op drijvende
platforms”, 1982
A.C.D.O. de Wulf, G.J.K. Brouns,
“Geometrische kalibratie van een peilschip”,
parts I and II, 2002
J.E. Hughes Clarke, “A reassessment of
vessel coordinate systems: what is it that we
are really aligning?”, 2003
N. de Hilster, “The MRU and SRF aligned”,
parts I, II and III, 2008/2009
J. Vint, “Dynamic Calibration of Navigation
Sensors Using GNSS Technology”, 2013
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
11/17
12. Surveying vessels: Early Names
Scholekster by F. Maas and H. van der
Marel, after 1988 by A.P.M. Pieters
Houtvliet by H. Murre and an assistant,
after 1988 by A.P.M. Pieters
Christaan Brunings by A.P.M. Pieters in
1989
From 1989 on: A.P.M. Pieters and various
assistants
1998: N. de Hilster and E.B. Wiegmann
take over from A.P.M. Pieters
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
12/17
13. Surveying floating objects: Firms
Passe Partout: J.J. Knol
(managing director)
GeoW: H. Waanders
(former Delta Works surveyor)
Geocon: M. van der Bosch
(tunneling)
Simtech
Delta Surveys
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
13/17
14. Surveying vessels: Instruments
Initially tape measures
Delta works: Wild T2, tape measures
1989: total station (AGA 140, TC1)
2004: photogrammetry
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
14/17
15. Surveying vessels: Accuracy
Tape measures: 10-50 cm (only X/Y)
Deltaworks (1980s): app. 1-2 cm
1998: Move3 modified and
implemented: 2-3 mm
2004: 1:20000 (1mm/20m)
Now: 1:40000 (1mm/40m)
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
15/17
16. Do we need that accuracy?
Better comparison
Project requirements
Cost reduction
Improves performance of LRK/INS
Higher accuracy: better calibrations
Aligning the MRU with the SRF
Pitch/roll alignment accuracy: 0.02°
Aligning a PHINS (0.02xSEC(LAT)°)
3 axis alignment accuracy: <=0.03°
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
16/17
17. Conclusion
Started at the Delta Works
Kept pace with project requirements
and sensor accuracies
Job for specialists
15 January 2014
N. de Hilster, Vessel Geometry and Calibrations: a historical perspective
17/17