Space Positioning Calibration Using Differential Data and Certificates
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Solution Overview
Problem
Existing spatial positioning systems suffer from inaccuracies due to orbit, satellite, and receiver errors, lack of regular calibration, and unverifiable data, leading to low accuracy and reliability of positioning data.
Innovation Solution
A trusted space positioning calibration service system that includes a differential benchmark data service module, positioning data digital calibration server, and trusted space positioning calibration apparatus, which perform differential positioning solutions, generate calibration certificates, and use device certificates for verification, ensuring accurate and reliable positioning data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS module is used for positioning data generation, then positioning service can be provided, but positioning accuracy and stability are low due to multiple errors
Solution Approach 1:
The patent introduces a positioning data calibration server as an intermediary between the GNSS module and the positioning service. This server receives original positioning data, performs calibration using correction parameters from digital calibration certificates, and outputs calibrated positioning data. The calibration server mediates the positioning process to eliminate errors from orbit, satellite clock, ionosphere, troposphere, multipath, and receiver clock, thereby improving both accuracy and reliability.
Solution Approach 2:
The patent implements preliminary calibration actions by obtaining digital calibration certificates before positioning data generation. These certificates contain pre-calculated correction parameters that are applied to the original positioning data. The calibration process is performed in advance or concurrently with data collection, ensuring that positioning data is corrected for various errors before being used, thus improving measurement precision and reliability.
2Measurement precision
If commercial differential benchmark data is used for RTK positioning, then higher accuracy can be achieved, but data trustworthiness is compromised due to satellite occlusion and radio interference
Solution Approach 1:
The patent implements a self-service positioning system that generates its own calibration data through digital calibration certificates. Instead of relying on external commercial differential benchmark data that may be affected by satellite occlusion and radio interference, the system performs self-calibration using correction parameters obtained from trusted calibration services. This self-service approach ensures data trustworthiness while maintaining high positioning accuracy through RTK-based calibration.
Solution Approach 2:
The positioning data calibration server acts as a trusted intermediary that provides calibration services without the vulnerabilities of commercial benchmark stations. It receives original positioning data, applies correction parameters from digital calibration certificates, and delivers calibrated data. This intermediary service eliminates the trustworthiness issues associated with commercial data while maintaining the accuracy benefits of differential positioning.
3Device complexity
If regular calibration is not performed, then system complexity is reduced, but positioning data accuracy deteriorates due to time-frequency deviation and drift
Solution Approach 1:
The patent implements periodic calibration actions through automatic calibration mechanisms. The positioning data calibration server periodically obtains digital calibration certificates and updates correction parameters. The system performs regular calibration cycles to compensate for time-frequency deviation and drift that occur during operation. This periodic calibration maintains positioning accuracy without requiring complex manual intervention, balancing system complexity with measurement precision.
Solution Approach 2:
The patent incorporates feedback mechanisms where the positioning data calibration server continuously monitors positioning data quality and automatically triggers calibration when drift is detected. The system uses feedback from the positioning process itself to determine when calibration is needed, and applies correction parameters from digital calibration certificates to maintain accuracy. This feedback-driven approach maintains measurement precision while managing system complexity through automated decision-making.
4Ease of operation
If positioning data is not verified with digital identity, then operation simplicity is maintained, but data reliability and traceability are low
Solution Approach 1:
The patent uses digital calibration certificates as digital copies that verify positioning data authenticity. These certificates contain calibration parameters and digital signatures that serve as verifiable copies of the calibration process. The system attaches these digital certificates to positioning data, enabling automated verification without complex manual procedures. This copying approach maintains ease of operation while significantly improving data reliability and traceability through cryptographic verification.
Data Source
AI summary
The present application provides a trusted space positioning calibration service system and an operation method thereof. The system includes: a differential benchmark data service module, a positioning data digital calibration server and a trusted space positioning calibration apparatus. The differential benchmark data service module is configured to provide differential benchmark data to the trusted space positioning calibration apparatus; the trusted space positioning calibration apparatus is configured to collect original positioning data of the trusted space positioning calibration apparatus and perform differential positioning solution in combination with the differential benchmark data, and obtain positioning data after the differential positioning solution as positioning data to be calibrated; the positioning data digital calibration server is configured to receive original positioning data, the differential benchmark data and the positioning data to be calibrated from the trusted space positioning calibration apparatus and calibrate the positioning data to be calibrated according to the these data.