公开(公告)号：US20210396890A1

公开(公告)日：2021-12-23

申请号：US17269390

申请日：2019-04-04

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xing LIU ,  Tarig Ballal Khidir AHMED ,  Tareq Y. AL-NAFFOURI

IPC: G01S19/55 ,  G01S19/39 ,  G01S19/50 ,  G01S19/40

Abstract: A method for determining a 3-dimensional (3D) attitude of a platform includes receiving satellite relayed information regarding an ambiguous phase single-difference measurement (φ); resolving a phase ambiguity of the ambiguous phase single-difference measurement (φ) to determine an unambiguous phase single-difference estimate (ϕ); calculating coarse direction vectors xcor and ycor based on the unambiguous phase single-difference estimate (ϕ); estimating improved direction vectors x and y based on the coarse direction vectors xcor and ycor and by imposing constraints on the improved direction vectors x and y and an angle between the improved direction vectors x and y; and calculating the 3D attitude of the platform from the improved direction vectors x and y.