Satellite Receiver Server for Positioning Error Reduction
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Solution Overview
Problem
The existing satellite navigation systems face position estimation errors due to time delays in identifying erroneous satellites, as the satellite receiver may use signals from malfunctioning satellites before receiving unhealthy state information.
Innovation Solution
Implementing a monitoring server that provides satellite state information directly to the satellite receiver, allowing it to restrict the use of signals from suspected erroneous satellites and verify their status through Receiver Autonomous Integrity Monitoring (RAIM), thereby reducing delays and errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite state information is transmitted through the satellite itself, then the system structure remains simple, but position estimation error increases due to time delay
Solution Approach 1:
The patent introduces a server as an intermediary component that receives satellite state information from the satellite control center and transmits it to the satellite receiver. This mediator architecture allows the receiver to obtain state information without waiting for satellite transmission, thereby reducing time delay and improving position estimation accuracy while maintaining system simplicity
2Reliability
If the satellite receiver waits for satellite state information before identifying erroneous satellites, then false restrictions are reduced, but position estimation error increases during the waiting period
Solution Approach 1:
The patent implements preliminary action by having the server proactively transmit satellite state information to the receiver before the receiver needs to make positioning decisions. The receiver receives state information in advance, performs RAIM analysis more effectively, and can accurately identify erroneous satellites without unnecessary delays or false restrictions
Data Source
AI summary
Provided is a system and method for transmitting a satellite state to a satellite receiver to determine use or non-use of a satellite signal in positioning estimation. A satellite navigation system includes at least one satellite, a satellite control center for controlling the at least one satellite, and a server. The server transmits satellite state information about the at least one satellite identified through the satellite control center to the satellite receiver. The satellite receiver restricts the use of the satellite signal for positioning estimation when the satellite state is identified as erroneous.