Patent ID: 11971489
Assignee: SHANGHAI HUACE NAVIGATION TECHNOLOGY LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for converting state space representation (SSR) information to observation space representation (OSR) information for a satellite positioning system, the method being performed by a processor and comprising:
receiving the SSR information via at least one wireless receiver, said SSR information being broadcasted and comprising difference code bias (DCB) of a satellite orbit, a satellite clock error, the ionosphere, the troposphere, an antenna phase center offset (PCO), an antenna phase center variation (PCV), a solid Earth tide and a hardware delay;
obtaining OSR data comprising data following a Radio Technical Commission for Maritime services (RTCM) protocol and a rearrangement comprising information of the RTCM protocol, said OSR data defining a reference point;
calculating a virtual observation distance by calculating a geometric distance between the satellite and the reference point according to coordinates of the reference point defined by the OSR data and correcting the geometric distance according to the satellite clock error, the ionosphere, the troposphere, the antenna PCO, the antenna PCV, the solid Earth tide and the hardware delay to obtain the virtual observation distance;
calculating delay information of a troposphere and delay information of an ionosphere based at least on the satellite clock error by:
extracting an absolute ionospheric value and an absolute tropospheric value by using a precise point positioning (PPP) method, wherein the absolute ionospheric value and the absolute tropospheric value are unrelated to a reference station,
constructing spatial-relation-based ionospheric and tropospheric parameters according to coordinates of a regional reference point, and
restoring an ionospheric delay amount and a tropospheric delay amount of the reference point according to a relationship between coordinates of a receiver reference point and coordinates of the regional reference point; and

providing the OSR information comprising the virtual observation distance and said delay information of the troposphere and of the ionosphere corresponding to the receiver reference point.