Phase and coherence analysis of VHF scintillation over Christmas Island
This short paper presents phase and coherence data from the cross-wavelet transform applied on longitudinally separated very high frequency (VHF) equatorial ionospheric scintillation observations over Christmas Island. The phase and coherence analyses were employed on a pair of scintillation obse...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2014-03-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/32/293/2014/angeo-32-293-2014.pdf |
| Summary: | This short paper presents phase and coherence data from the cross-wavelet
transform applied on longitudinally separated very high frequency (VHF) equatorial ionospheric
scintillation observations over Christmas Island. The phase and coherence
analyses were employed on a pair of scintillation observations, namely, the
east-looking and west-looking VHF scintillation monitors at Christmas Island.
Our analysis includes 3 years of peak season scintillation data from
2008, 2009 (low solar activity), and 2011 (moderate solar activity). In
statistically significant and high spectral coherence regions of the
cross-wavelet transform, scintillation observations from the east-looking
monitor lead those from the west-looking monitor by about 20 to 60 (40 ±
20) min (most frequent lead times). Using several years (seasons and
solar cycle) of lead (or lag) and coherence information of the cross-wavelet
transform, we envisage construction of a probability model for forecasting
scintillation in the nighttime equatorial ionosphere. |
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| ISSN: | 0992-7689 1432-0576 |