Patent ID: 7043364
Filing Date: 2006-05-09
Classification: G01C

Abstract:
1. A walking stick navigator (WSN) on a staff having a lower end, and a top end, the WSN being carried by a surveyor and comprising: an Aided Inertial Navigation System (AINS) coupled to the staff, the AINS having an IMU providing inertial outputs, a switch coupled to the lower end to provide a contact signal indicating when the lower end of the staff assembly is stationary, the contact signal defining the duration of a stationary interval, a GPS receiver and antenna attached to the staff, the GPS receiver being coupled to provide a first aiding signal to the AINS, a digital computer running a position measurement program solving a position aiding algorithm responsive to the IMU outputs and the contact signal, the position measurement program providing a second aiding signal to the AINS.