Balloon Positioning System Mitigating Ionospheric Signal Interference
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Solution Overview
Problem
Existing positioning systems, such as GPS, often face challenges in accurately determining a device's position due to signal reception issues and interference, particularly when signals need to traverse the ionosphere and are weakened by long distances.
Innovation Solution
A balloon-based positioning system is introduced, featuring high-altitude balloons equipped with position-determining and position-broadcasting modules that determine and broadcast their positions, allowing ground-based receivers to calculate their own position using collective balloon-positioning data, avoiding ionospheric interference and benefiting from stronger signal strength and increased line-of-sight opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If GPS satellites broadcast signals from high orbit, then coverage area is improved, but signal strength deteriorates due to long distance transmission
Solution Approach 1:
The patent introduces high-altitude balloons as intermediary positioning nodes between GPS satellites and ground receivers. These balloons receive satellite signals and re-broadcast them locally, creating a relay system that maintains signal strength over shorter distances while extending coverage to remote areas where direct satellite reception is difficult.
Solution Approach 2:
The patent transitions from a purely satellite-based three-dimensional positioning system to a hybrid system that incorporates atmospheric-layer positioning nodes. By placing balloons in the stratosphere (approximately 18-25 km altitude), the system creates an intermediate dimensional layer that reduces the effective distance to ground receivers and improves signal propagation characteristics.
2Area of stationary object
If GPS signals traverse the ionosphere, then global coverage is improved, but measurement precision deteriorates due to ionospheric interference
Solution Approach 1:
The high-altitude balloons serve as intermediary nodes that receive GPS signals above the bulk of the ionosphere and re-broadcast them to ground receivers. This approach minimizes ionospheric interference because the balloons operate at altitudes where ionospheric effects are reduced, and the signals travel a shorter path through the remaining ionosphere to reach ground-based receivers.
Solution Approach 2:
The balloon-based system creates local copies of GPS positioning signals that have already traversed minimal ionospheric interference. Each balloon acts as an independent signal source that replicates the satellite positioning data locally, allowing ground receivers to obtain positioning information from multiple independent signal paths, thereby improving accuracy through redundancy and error correction.
3Measurement precision
If more satellites are deployed to improve positioning accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the positioning system into two distinct functional layers: GPS satellite constellation (providing orbital positioning data) and high-altitude balloon nodes (providing local signal relay and additional positioning references). This segmentation allows the system to achieve improved positioning accuracy through the balloons without requiring an increased number of satellites, thereby avoiding the complexity associated with satellite deployment and management.
Solution Approach 2:
The high-altitude balloons serve multiple functions simultaneously: they act as signal relays for GPS satellites, provide independent positioning references, and can function as communication nodes. This multi-functionality allows the system to improve positioning accuracy without adding dedicated satellite infrastructure, reducing overall system complexity while achieving enhanced measurement precision.
Data Source
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AI summary
Disclosed herein are embodiments of a balloon- based positioning system and method. In one example embodiment, a sysiem includes at least three balloons, with each balloon including a position-determining module (PDM) and a position-broadcasting module (PBM). Each PDM is configured for determining a position of the respective balloon and each PBM is configured for broadcasting a balloon signal containing balloon-positioning data of the respective balloon. The balloon-positioning data includes the determined position of the respective balloon and a corresponding time of broadcast.