Title :
RTK height measurements show gradient on sea surface?
Author :
Godhavn, John-Morten ; Johansen, Edgar
Author_Institution :
Res. & Dev., Kongsberg Seatex AS, Trondheim, Norway
Abstract :
High accuracy kinematic GPS height measurements open up a wide range of new possibilities, for example, for applications like hydrographic seabed mapping and dredging. This paper will describe how a vessel mounted integrated navigation system with GPS RTK and a motion sensor with rate gyros and accelerometers is sufficiently accurate to verify that the Earth geoid and the WGS84 ellipsoid used by GPS are not parallel even in a small survey area at sea. An accurate geoid model may be required in some areas to exploit kinematic GPS height accuracy
Keywords :
Global Positioning System; geodesy; geophysical techniques; marine systems; oceanographic equipment; oceanographic techniques; GPS; RTK; accelerometer; bathymetry; coast; geodesy; geoid; geophysical method; hydrographic seabed mapping; integrated navigation system; marine system; measurement technique; motion sensor; navigation; ocean; radionavigation; rate gyro; real time kinematic; sea level; sea surface height; ship; spatial gradient; vessel mounted; Accelerometers; Earth; Ellipsoids; Global Positioning System; Kinematics; Navigation; Sea measurements; Sea surface; Sensor phenomena and characterization; Sensor systems;
Conference_Titel :
OCEANS, 2001. MTS/IEEE Conference and Exhibition
Conference_Location :
Honolulu, HI
Print_ISBN :
0-933957-28-9
DOI :
10.1109/OCEANS.2001.968783
