Patent ID: 6834234
Filing Date: 2004-12-21
Classification: G01C,G01S

Abstract:
A Land Surveyor System with Reprocessing (LSSRP) comprising:an AINS providing a sequence of time-indexed present position values in response to the LSSRP being moved from a first known position value at the start of a survey interval to a second known position value at the end of the survey interval, a Position Computing System (PCS) coupled to receive and store the sequence of time-indexed present position values as a surveyor carries the LSSRP from the first known position to the second known position, the PCS and the AINS being integrally coupled into a package to be carried by a surveyor, the package further comprising an input/output interface device having a means for inputting and time-indexing successive first and second known present position values at respective successive known present position fixes, each successive pair of known present position values establishing the beginning and end of a survey interval, the PCS having a reprocessing computer and program means coupled to receive and store the successive time-indexed known present position fix values and for processing the indexed present position values with a smoothing algorithm to provide indexed and adjusted present position values for at least some of the indexed present position values between the first known position fix value at the start of the survey interval and the second known position fix value at the end of the survey interval, the PCS also having, a switch means for signaling the AINS and the Kalman filter that the unit is stationary by use of an algorithm, running in the PCS reprocessing computer and program means, for deducing zero velocity from computed inertial velocity.