A method for automatic detection and characterization of plasma bubbles using GPS and BDS data
| Autor: | Qiang Li, Zhipeng Wang, Kun Fang, Yanbo Zhu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Solar minimum
TEC depletion 0209 industrial biotechnology GNSS augmentation TEC BeiDou Navigation Satellite System Ionosphere gradient Aerospace Engineering 02 engineering and technology 01 natural sciences Physics::Geophysics 010305 fluids & plasmas 020901 industrial engineering & automation 0103 physical sciences Front velocity Motor vehicles. Aeronautics. Astronautics Physics Total electron content business.industry Mechanical Engineering Ground-Based Augmentation System (GBAS) TL1-4050 Geodesy Depletion drift Physics::Space Physics Global Positioning System Ionosphere business Plasma bubble |
| Zdroj: | Chinese Journal of Aeronautics, Vol 34, Iss 5, Pp 195-204 (2021) |
| ISSN: | 1000-9361 |
| DOI: | 10.1016/j.cja.2020.10.014 |
| Popis: | Detecting and characterizing Total Electron Content (TEC) depletion is important for studying the ionospheric threat due to the Equatorial Plasma Bubble (EPB) when applying the Ground-Based Augmentation System (GBAS) at low latitudes. This paper develops a robust method to automatically identify TEC depletion and derive its parameters. The rolling barrel algorithm is used to automatically identify the TEC depletion candidate and its parameters. Then, the depletion candidates are screened by several improved techniques to distinguish actual depletions from other phenomena such as Traveling Ionospheric Disturbance (TID) or abnormal data. Next, based on the depletion signals from three triangular receivers, the method derives EPB parameters such as velocity, width and gradient. The time lag and front velocity are calculated based on cross-correlation using TEC depletions and the geometrical distribution of three triangular receivers. The width and gradient of slope are then determined by using TEC depletion from a single receiver. By comparison, both the station-pair method and proposed method depend on the assumption that the EPB morphology is frozen during the short time when the plasma bubble moves between the receivers. However, our method relaxes the restriction that the baseline length should be shorter than the width of slope required by the station-pair. This relaxation is favorable for studying small-scale slope of depletions using stations of a longer baseline. In addition, the accuracy of the width and gradient is free of impact from hardware biases and small-scale disturbance, as it is based only on the relative TEC variation. The method is demonstrated by processing Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS) data on 15 August, 2018, in a solar minimum cycle. |
| Databáze: | OpenAIRE |
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