Height determining system for automatic GPS receiver

摘要

A tape measurement apparatus is provided for measuring the slope height of a GPS surveying system receiver, with an integral antenna, which is vertically suspended over a ground mark. A tape mounting hook is provided for securing the distal end of a tape measure in a location which is known precisely with respect to the phase center of the GPS receiver. The tape measure housing has a pointer arm of precisely known length which extends out from the tape measure housing in a direction opposite and parallel to the normalized line of extension of the tape from the housing. A distance scale imprinted on the tape compensates for the combined lengths of the housing and pointer arm so that a user can read the uncorrected slope height of the GPS receiver directly from the scale while applying the tip of the pointer arm to the ground mark.