Method and device for mobile station positioning by means of a satellite, and associated transmission method
First Claim
1. Positioning method for a mobile station in the radio coverage area of a satellite, comprising the following steps:
- determining the instantaneous distance between said satellite and said mobile station;
calculating the instantaneous elevation angle φ
of said satellite from said instantaneous distance, the altitude of said satellite and the radius of the Earth;
determining the Doppler shift δ
;
calculating the angle θ
between the projections onto the surface of the Earth of the track of said satellite and a straight line segment passing through said satellite and said mobile station from said Doppler shift δ and
said instantaneous elevation angle φ
; and
determining the location of said mobile station from said instantaneous distance, said instantaneous elevation angle φ and
said angle θ
.
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Accused Products
Abstract
A positioning method for a mobile station in the radio coverage area of a satellite entails determining the instantaneous distance between the satellite and the mobile station. The instantaneous elevation angle φ of the satellite is then calculated from the instantaneous distance, the altitude of the satellite and the radius of the Earth. The Doppler shift δ is then determined, after which the angle θ between the projections onto the surface of the Earth of the track of the satellite and a straight line segment passing through the satellite and the mobile station is calculated from the Doppler shift δ and the instantaneous elevation angle φ. The location of the mobile station is then determined from the instantaneous distance, the instantaneous elevation angle φ and the angle θ.
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Citations
9 Claims
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1. Positioning method for a mobile station in the radio coverage area of a satellite, comprising the following steps:
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determining the instantaneous distance between said satellite and said mobile station; calculating the instantaneous elevation angle φ
of said satellite from said instantaneous distance, the altitude of said satellite and the radius of the Earth;determining the Doppler shift δ
;calculating the angle θ
between the projections onto the surface of the Earth of the track of said satellite and a straight line segment passing through said satellite and said mobile station from said Doppler shift δ and
said instantaneous elevation angle φ
; anddetermining the location of said mobile station from said instantaneous distance, said instantaneous elevation angle φ and
said angle θ
. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification