Illustration of the system structure. The system consists of three parts. The first part is the atmosphere initialization for individual vehicles. The second part is the atmosphere initialization for the cloud-sever end. The third part is the CAM augmenting user positioning and CAM refinement
Newswise — The quest for enhanced Global Navigation Satellite System (GNSS) accuracy has been hindered by the limitations of current atmospheric correction models, which depend on sparse, high-cost infrastructure. These traditional models struggle to provide the high-resolution data necessary for precise positioning, especially in dynamic environments like autonomous driving. The advent of this study addresses this challenge by proposing a crowdsourced approach to generate detailed atmospheric maps, promising to significantly improve GNSS performance and reduce costs.
Researchers from the Chinese Academy of Sciences have developed an innovative GNSS positioning framework published on May 13, 2024, in Satellite Navigation. The study (DOI: 10.1186/s43020-024-00135-8) details a system that uses dual base stations and Crowdsourced Atmospheric delay correction Maps (CAM) to achieve high-precision positioning, a significant advancement for applications such as autonomous driving and Internet of Things (IoT).
The research introduces a novel GNSS positioning framework that leverages dual base stations and massive vehicle data to produce high-resolution atmospheric maps, enhancing the precision of GNSS. This crowd-sourced approach, termed CAM, utilizes data from vehicles equipped with GNSS receivers. These vehicles collect and transmit atmospheric delay data to a cloud server where it is integrated and processed to continuously update the CAM. This dynamic updating process improves both the CAM spatial resolution and the positioning accuracy for public users in real-time. The core innovation of this framework lies in its use of common vehicle GNSS data, which is more abundant and readily available compared to traditional data sources. By aggregating and refining this data, the study achieves a cost-effective method for generating detailed atmospheric delay corrections. The CAM significantly reduces the reliance on expensive and less distributed Continuous Operational Reference System (CORS) stations traditionally used for atmospheric data, offering a scalable solution that enhances the feasibility and accuracy of precision GNSS applications.
Dr. Yunbin Yuan, lead researcher, states, "This framework not only lowers the costs of atmospheric data collection but also significantly increases the accuracy and reliability of GNSS positioning, marking a significant leap forward in location-based services."
The application of this technology extends beyond improved Global Positioning System (GPS) accuracy; it also opens avenues for real-time environmental monitoring and has significant implications for urban planning, transportation, and emergency response systems. As vehicles become data collection hubs, the scalability of this technology promises extensive socio-economic benefits, particularly in highly urbanized regions.
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References
DOI
Original Source URL
https://doi.org/10.1186/s43020-024-00135-8
Funding information
This research is funded by the National Key R&D Program of China (NO. 2022YFB3903903) and the National Natural Science Foundation of China (NO. 41974008, NO. 42074045).
About Satellite Navigation
Satellite Navigation (E-ISSN: 2662-1363; ISSN: 2662-9291) is the official journal of Aerospace Information Research Institute, Chinese Academy of Sciences. The journal aims to report innovative ideas, new results or progress on the theoretical techniques and applications of satellite navigation. The journal welcomes original articles, reviews and commentaries.
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