Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal...
Transcript of Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal...
![Page 1: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/1.jpg)
Evaluation of GNSS-derived Tidal Information in Hydrographic Applications
Ben Dean Hydro14 - 28th October 2014 Aberdeen, United Kingdom
![Page 2: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/2.jpg)
Introduction
• Precise Point Positioning (PPP) • C-Nav • Vertical Reference Surfaces • Testing Methodology • Results • Conclusion • Future…………
![Page 3: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/3.jpg)
• Absolute positioning technique • Utilises improved orbit and clock products • Allows a stand-alone GNSS receiver to
achieve centimetric positioning accuracy • Cost effective • Global (No spatial decorrolation) • Sparse global network (40 to 80 stations)
Precise Point Positioning 1/2
![Page 4: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/4.jpg)
• Attributed to Zumberge 1997 • Early commercial services (GPS);
• NavCom StarFire (C-Nav RTG) • Thales Geosolutions SkyFix-XP
• Vertical accuracy ~45cm (Bisnath et al. 2003)
• GLONASS (2009)
Precise Point Positioning 2/2
![Page 5: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/5.jpg)
• 1986 STARFIX (John E. Chance & Assoc.) • 2001 Partnership with NavCom Technology Inc. • 2002 C-Nav RTG (Real-Time Gypsy) GPS • 2011 GPS/GLONASS (iCORE) • H < 10cm V < 15cm (95%)
C-Nav
![Page 6: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/6.jpg)
Hydrographic Vertical Datums
• Datums • Global MSS
• DTU10 • CNES CLS 2011
• Local • VORF • BATHYELLI
![Page 7: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/7.jpg)
BATHYELLI 1/2
• BATHYmetry with reference to the ELLIpsoid • Data Sets
![Page 9: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/9.jpg)
Conventional Surveying
Credit: Ziebart, et al. VORF – The Vertical Offshore Reference Frame: Enabling Real-time Hydrographic Surveying
![Page 10: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/10.jpg)
Surveying on the Ellipsoid
Credit: Ziebart, et al. VORF – The Vertical Offshore Reference Frame: Enabling Real-time Hydrographic Surveying
![Page 11: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/11.jpg)
Testing Methodology 1/4
• Survey Vessel Haliotis
![Page 12: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/12.jpg)
Testing Methodology 2/4
![Page 13: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/13.jpg)
Testing Methodology 3/4
![Page 14: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/14.jpg)
Testing Methodology 4/4
• Survey Area • Bay of Brest
![Page 15: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/15.jpg)
Results 1/4
![Page 17: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/17.jpg)
Results 3/4
![Page 18: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/18.jpg)
Results 4/4
![Page 19: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/19.jpg)
Conclusions
• PPP allows a stand-alone GNSS receiver to achieve centimetric positioning accuracy by utilising improved orbit and clock products
• BATHYELLI provides a link between CD and GNSS (GRS80)
• Real-time study (PPP / RTK / Tide Gauge) • PPP standard deviations <7cm
![Page 20: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/20.jpg)
Future…….Death of RTK?
• Galileo, BeiDou, QZSS • Galileo CS on E6 • Triple-Frequency PPP (more combinations) • Local/Global Ionospheric & Tropospheric
corrections • Fractional Cycle Biases
![Page 21: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/21.jpg)
Acknowledgements
GENAVIR is a Group of Economic Interest for the management of oceanonographic fleets
-GENAVIR operates : - Ifremer fleet : 8 vessels – 5 deep underwater systems (ROV, AUVs , deep tow …) - IRD fleet (2 vessels)
-320 people, including : - vessels crews (200) - engineers and technicians (70 in Toulon and Brest) for : - vessels and equipment maintenance - underwater systems operation and maintenance - scientific equipment operation - data quality assurance - navigation and QC software development
![Page 22: Evaluation of GNSS- derived Tidal Information in ...€¦ · Evaluation of GNSS- derived Tidal Information in Hydrographic Applications Ben Dean ... 28th October 2014 Aberdeen, United](https://reader033.fdocuments.us/reader033/viewer/2022052719/5f0777d57e708231d41d21aa/html5/thumbnails/22.jpg)
Questions?
Questions…….