A Method for Land Vehicle Gravity Anomaly Measurement Combining an Inertial Navigation System, Odometer, and Geo-Information System

A Method for Land Vehicle Gravity Anomaly Measurement Combining an Inertial Navigation System, Odometer, and Geo-Information System

Blog Article

Land vehicle gravity anomaly measurement relies heavily on global navigation satellite system (GNSS).However, when gravity measurement is carried out in special environments such as forests, valleys and tunnels, GNSS observation quality will inevitably decline, which directly affects the accuracy of gravity anomaly measurement.From the point of view of the gravity anomaly measurement principle, obtaining accurate elevation information of the test line is the premise to ensure the accuracy of gravity anomaly measurement.Thus, this paper proposes a strapdown laguna 3hp dust collector land vehicle dynamic gravity anomaly measurement method combining an odometer and a geo-information system.

In this method, strapdown inertial navigation errors are suppressed by observing the velocity of the odometer output.Then, the position information obtained by the combined navigation is entered into the geo-information system to obtain the elevation.The results of a single test line show whole wheat phyllo dough that the external coincidence accuracy of the proposed method is 1.65 mGal, and the accuracy is comparable to the traditional GNSS assisted land vehicle gravimetry method.

In addition, compared with the odometer assisted land vehicle gravimetry method, the external coincidence accuracy is increased by 30%.