The document discusses long range kinematic (LRK) positioning techniques for marine surveying applications. It describes where LRK is used, the key components which include a rover, base, data exchange, and communication. It also discusses trends toward using additional GNSS signals like GLONASS to improve accuracy over long distances. Examples are given of LRK being used for hydrographic surveys over hundreds of kilometers and dredging projects in China over 100 km.

1. Long Range Kinematic for Marine Surveying – Latest State of the Art Olivier Casabianca Benelux Hydrographic Society Workshop 7 May 2008

2. LRK® Long Range Kinematic: Where? Hydrography & Bathymetry Dredging & Coastal Works Offshore Production (Oil & Gas, Drill Positioning, Laying Cable) Seismic & Offshore Surveys Coastal Reference Station

9. Magellan Professional’s answer: New Core Technology GPS/GLONASS L1/L2, up to 75 channels New High-End Land Survey product: ProMark 500 Coming soon - Marine Sensor …

11. Network Benefits? “ MASTER”: RTCM-3 Messages 1004,1006,1008 “ MASTER+Network”: Additional RTCM-3 Messages 1014-1016 (Master-Auxiliary corrections)

13. LRK® with Moving Base… Performance? Performance is potentially the same with either static or moving base However, a moving base usually experiences worse GNSS tracking, more frequent carrier cycle slips and loss of lock compared to a static base. As a result, actual performance of an RTK rover working with a moving base may degrade because of poorer data quality coming from this moving base. ΔX, ΔY, ΔZ

16. Use Cases and References… Use Cases and References…

18. LRK Hydrographic Survey in Canada 300 km 6 LRK Stations Longueuil Verchères Sorel Grondine Portneuf Neuville St-François Montmagny Pointe du Lac Sainte-Marthe Montréal Québec Répétitrice Station OTF Chenal Dragué