GNSS Reference Station Autonomous Positioning via PPP-RTK
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Solution Overview
Problem
Conventional GNSS reference stations require precise initial surveying and continuous re-measurement due to positional changes caused by diastrophism or crustal deformation, necessitating relative positioning technologies that rely on other reference stations, which is cumbersome and limits installation flexibility.
Innovation Solution
A self-contained GNSS reference station equipped with a GNSS antenna and receiver that independently calculates and monitors its precise position using satellite-based high-precision positioning technology, such as PPP or PPP-RTK, eliminating the need for initial surveys and re-measurements, and allowing installation at any suitable location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional relative positioning techniques (RTK, DGNSS) are used to determine reference station position, then positioning accuracy can be achieved, but it requires existing reference stations nearby and complex survey procedures
Solution Approach 1:
The reference station performs autonomous positioning using satellite signals and atmospheric correction data without requiring other reference stations. The system self-determines its coordinates through PPP-RTK processing, eliminating the need for complex relative positioning surveys and making the station independent of external reference infrastructure.
Solution Approach 2:
The patent introduces atmospheric correction data (ionospheric and tropospheric parameters) as an intermediary element that enables accurate positioning without requiring nearby reference stations. This correction data acts as a mediator between the satellite signals and the receiver, allowing the reference station to determine its position independently with high precision.
2Measurement precision
If reference station position is continuously monitored to account for diastrophism and crustal deformation, then real-time positioning accuracy is maintained, but it requires dynamic correction procedures and re-measurement
Solution Approach 1:
The reference station continuously self-updates its position coordinates by processing satellite signals and atmospheric correction data in real-time. This autonomous monitoring capability eliminates the need for periodic manual re-measurements and dynamic correction procedures, maintaining positioning accuracy while reducing time loss.
Solution Approach 2:
The system performs continuous positioning calculations using ongoing satellite signal reception and atmospheric correction data updates. This continuous operation ensures real-time position accuracy is maintained without interruption or need for periodic re-measurement campaigns.
3Measurement precision
If precise initial surveying is conducted before reference station installation, then accurate initial coordinates are obtained, but it requires nearby existing reference stations and extensive survey work
Solution Approach 1:
After installation, the reference station automatically determines its own coordinates through autonomous PPP-RTK processing using satellite signals and atmospheric correction data. This self-positioning capability eliminates the need for precise initial surveying and makes installation straightforward without requiring nearby reference stations or complex survey equipment.
4Adaptability or versatility
If virtual reference stations are used to improve positioning accuracy in areas without physical reference stations, then positioning service coverage is expanded, but it increases system complexity and requires additional correction infrastructure
Solution Approach 1:
Any receiver can function as its own reference station by autonomously obtaining atmospheric correction data and performing PPP-RTK processing. This eliminates the need for virtual reference station infrastructure and complex correction networks, while providing accurate positioning service anywhere with satellite signal access.
Data Source
AI summary
A reference station includes a GNSS antenna configured to receive a plurality of GNSS signals including augmentation information, and a GNSS receiver having a positioning processor, a signal processor, and a signal transmitter. The positioning processor calculates a current position of the reference station based on received GNSS signals including the augmentation information without using position information of another reference station or error correction information sent via a non-GNSS satellite communication link, and thus the reference station can be independently installed at a desirable location without surveying or measuring the desirable location. The signal processor generates error correction information including the current position of the reference station in a predetermined data format such as RTCM or CMR, based on the received GNSS signals. The signal transmitter transmits the error correction information via a communication link, allowing rovers to perform centimeter-level RTK positioning using the current position of the reference station.