The use of Global Navigation Satellite System (GNSS) data for land vehicle gravimetry tests\nis challenged by complicated environments. A new approach for land vehicle gravimetry using a\nStrapdown Inertial Navigation System and velometer-integrated navigation computation (SINS/VEL)\nwithout using GNSS information has been put forward. Aided by the velometer with continuous\nlongitudinal velocity output instead of GNSS signals, a SGA-WZ02 strapdown gravimeter that used\nthe SINS/VEL method was tested in 2015. Four repeated lines were measured along a south-north\ndirection highway in Eastern Changsha to verify the new method�s feasibility and performance. The\ngravity disturbance results showed an internal accuracy in scalar gravimetry about 1.17 mGal and\n1.91 mGal for external accuracy assessment, with a spatial resolution of 1.7 km. Comparing this new\nmethod with the traditional SINS/GNSS gravimetry approach, it appeared that the results using\nSINS/VEL showed comparable internal and external accuracy. Theoretical analysis and practical test\nresults showed that the new method was feasible for gravity determination by land dynamic vehicle.
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