Patent ID: 8812235
Filing Date: 2014-08-19
Classification: G01C

Abstract:
1. A navigational system, the system comprising: at least one processor; an inertial measurement unit (IMU) that measures a trajectory and provides an output to the at least one processor, the at least one processor providing a navigation solution based on the output of the IMU, wherein the navigation solution includes a calculation of an n-dimensional parameter; and at most two velocity sensors that provide an output to the at least one processor, wherein the at most two velocity sensors measure velocity in at most two dimensions, wherein the at least one processor computes an estimate of an n-dimensional parameter from the output of the at most two velocity sensors for bounding errors in the n-dimensional parameter as calculated by the at least one processor when the trajectory measured by the IMU causes the at most two velocity sensors to measure motion through n dimensions, wherein “n” is greater than the number of dimensions measured simultaneously by the at most two velocity sensors.