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|Title:||Forecasting ionospheric scintillation occurrences In Hong Kong using GPS scintillations observed at Sanya Station||Authors:||Liu, Z
|Issue Date:||2016||Publisher:||Asia Oceania Geosciences Society||Source:||Annual Meeting of Asia Oceania Geosciences Society, 2016 How to cite?||Abstract:||Ionospheric scintillations have a great impact on Global Positioning System (GPS) high precision positioning and navigation. The ability to forecast the occurrence of low latitude scintillations is highly desired as this can help develop strategies to mitigate or even eliminate the scintillation impact on GPS positioning and navigation. In this study, the scintillation data from two low latitude stations in China, Sanya (18.4N°, 109.6E°) and Hong Kong (22.1N°, 114.2E°), are studied, with an aim to forecast the scintillation occurrence in Hong Kong using the Sanya station’s data.
In general, equatorial plasma bubbles (EPBs) are generated in groups around sunset and drifted eastward. When the EPBs are generated above or in the west of Sanya and drifted eastward, scintillation observations at Hong Kong will be later than Sanya in UT time. Therefore the detection of scintillations at Sanya can be used to forecast scintillation occurrence in Hong Kong. When EPBs are generated above Hong Kong, scintillations will be detected first in Hong Kong and EPBs will also likely generate scintillations above Sanya. In this case, the detection of scintillations in Hong Kong can be used to forecast scintillations in Sanya.
The ionospheric scintillation data collected at Sanya and Hong Kong stations in 2014 are analyzed to find any temporal correlation between the two stations. The Sanya station is found to have a higher scintillation occurrence (218 days in 2014) than Hong Kong one (128 days). We find on all the days when scintillations are detected in Hong Kong, scintillations are also observed in Sanya. When scintillations are observed near local sunsets (Hong Kong sunset approximately 20 minutes earlier than Sanya), the scintillation onset time in Hong Kong is earlier than Sanya. When scintillations are observed two or more hours after local sunsets, the scintillation onset time in Sanya is earlier than Hong Kong.
|Description:||Annual Meeting of Asia Oceania Geosciences Society, 2016, Beijing, China, 31 July-5 August 2016||URI:||http://hdl.handle.net/10397/75512|
|Appears in Collections:||Conference Paper|
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