Patent ID: 9638523
Date: 2017-05-02
CPC Classifications: G01C,G01S

Claim:
1. A survey system made up of a prism device including a reflecting prism and a surveying instrument including a horizontal drive section for horizontally rotating a collimating telescope, a vertical drive section for vertically rotating the collimating telescope, and control means for controlling both drive sections, wherein the prism device comprises a prism-side GPS receiver for detecting a position, an atmospheric pressure sensor for detecting an atmospheric pressure, and a prism-side transmitter and receiver section for communicating with the surveying instrument, the surveying instrument comprises a surveying instrument-side GPS receiver for detecting a position and a surveying instrument-side transmitter and receiver section for communicating with the prism device, and the control means of the surveying instrument detects and stores an atmospheric pressure to be a reference at the position of the prism device by use of the atmospheric pressure sensor, and includes azimuth angle and distance calculating means for calculating both of an azimuth angle of the prism device when viewed from the surveying instrument and a distance between the surveying instrument and the prism device from a position of the prism device and a position of a surveying instrument, elevation angle calculating means for calculating an elevation angle of the prism device when viewed from the surveying instrument from the distance and the atmospheric pressure to be the reference and an atmospheric pressure at a position of a survey point, and rotation command means for issuing a rotation command to the horizontal drive section and the vertical drive section so that the collimating telescope is directed toward the prism device based on the azimuth angle and the elevation angle.