05471218 is referenced by 73 patents and cites 4 patents.

Apparatus for measuring surveying parameters, such as distances and angular displacements between survey stations, with improved accuracy. The invention combines a differential satellite positioning system (SATPS), available with positioning systems such as GPS and GLONASS, with electromagnetic measurements of distances and optically encoded angles by a conventional electro-optical survey instrument to provide survey measurements that can be accurate to within a few millimeters in favorable situations. The differential satellite positioning system relies upon carrier phase measurements, after removal of certain phase integer ambiguities associated with carrier phase SATPS signals. The SATPS may be retrofitted within the housing of the conventional electro-optical instrument.

Title
Integrated terrestrial survey and satellite positioning system
Application Number
8/86665
Publication Number
5471218
Application Date
July 1, 1993
Publication Date
November 28, 1995
Inventor
Mark Nichols
Sunnyvale
CA, US
Nicholas C Talbot
Cupertino
CA, US
Agent
John Schipper
Assignee
Trimble Navigation
CA, US
IPC
H04B 7/185
G01S 5/02
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