Satellite navigation receiver and method for switching between real-time kinematic mode and relative positioning mode

US10605926B2 · kind B2 · utility

Assignee

• Deere & Company · US

Inventors

• F. Adhika Pradipta Lie · Torrance, US
• Michael A. Zeitzew · Los Angeles, US
• Yunfeng Shao · Beijing, CN
• Liwen L. Dai · Torrance, US

Key dates

• Filing date: Mar 18, 2016
• Grant date: Mar 31, 2020
• Expiry date: Aug 16, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/51
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An offset module or navigation positioning estimator determines a reference frame bias between precise point positioning (PPP) reference frame and an RTK reference frame, where the PPP reference frame is associated with relative position estimates generated by the relative position estimator and where the RTK reference frame is associated RTK position estimates generated by the RTK position estimator. Upon loss of the RTK correction signal, the navigation positioning estimator or controller switches to a relative position mode based a last available RTK position. The relative position estimator determines an estimated relative position based on time-differenced phase measurements by the mobile receiver in the relative position mode. The relative position estimator or offset module offsets the estimated relative position in the relative position mode.