GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm
The amplitude and phase scintillation indices are customarily obtained by specialised GPS Ionospheric Scintillation and TEC Monitors (GISTMs) from L1 signal recorded at the rate of 50 Hz. The scintillation indices S[subscript 4] and σ[subscript Φ] are stored in real time from an array of high-rate s...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Copernicus GmbH
2013
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| Online Access: | http://hdl.handle.net/1721.1/80331 |
| _version_ | 1826210729051553792 |
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| author | Prikryl, P. Ghoddousi-Fard, R. Kunduri, B. S. R. Thomas, E. G. Jayachandran, P. T. Spanswick, E. Danskin, D. W. Coster, Anthea J. |
| author2 | Haystack Observatory |
| author_facet | Haystack Observatory Prikryl, P. Ghoddousi-Fard, R. Kunduri, B. S. R. Thomas, E. G. Jayachandran, P. T. Spanswick, E. Danskin, D. W. Coster, Anthea J. |
| author_sort | Prikryl, P. |
| collection | MIT |
| description | The amplitude and phase scintillation indices are customarily obtained by specialised GPS Ionospheric Scintillation and TEC Monitors (GISTMs) from L1 signal recorded at the rate of 50 Hz. The scintillation indices S[subscript 4] and σ[subscript Φ] are stored in real time from an array of high-rate scintillation receivers of the Canadian High Arctic Ionospheric Network (CHAIN). Ionospheric phase scintillation was observed at high latitudes during a moderate geomagnetic storm (Dst = −61 nT) that was caused by a moderate solar wind plasma stream compounded with the impact of two coronal mass ejections. The most intense phase scintillation (σ[subscript Φ] ~ 1 rad) occurred in the cusp and the polar cap where it was co-located with a strong ionospheric convection, an extended tongue of ionisation and dense polar cap patches that were observed with ionosondes and HF radars. At sub-auroral latitudes, a sub-auroral polarisation stream that was observed by mid-latitude radars was associated with weak scintillation (defined arbitrarily as σ[subscript Φ] < 0.5 rad). In the auroral zone, moderate scintillation coincided with auroral breakups observed by an all-sky imager, a riometer and a magnetometer in Yellowknife. To overcome the limited geographic coverage by GISTMs other GNSS data sampled at 1 Hz can be used to obtain scintillation proxy indices. In this study, a phase scintillation proxy index (delta phase rate, DPR) is obtained from 1-Hz data from CHAIN and other GPS receivers. The 50-Hz and 1-Hz phase scintillation indices are correlated. The percentage occurrences of σ[subscript Φ] > 0.1 rad and DPR > 2 mm s[superscript −1], both mapped as a function of magnetic latitude and magnetic local time, are very similar. |
| first_indexed | 2024-09-23T14:54:47Z |
| format | Article |
| id | mit-1721.1/80331 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:54:47Z |
| publishDate | 2013 |
| publisher | Copernicus GmbH |
| record_format | dspace |
| spelling | mit-1721.1/803312022-09-29T11:21:14Z GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm Prikryl, P. Ghoddousi-Fard, R. Kunduri, B. S. R. Thomas, E. G. Jayachandran, P. T. Spanswick, E. Danskin, D. W. Coster, Anthea J. Haystack Observatory Coster, Anthea J. The amplitude and phase scintillation indices are customarily obtained by specialised GPS Ionospheric Scintillation and TEC Monitors (GISTMs) from L1 signal recorded at the rate of 50 Hz. The scintillation indices S[subscript 4] and σ[subscript Φ] are stored in real time from an array of high-rate scintillation receivers of the Canadian High Arctic Ionospheric Network (CHAIN). Ionospheric phase scintillation was observed at high latitudes during a moderate geomagnetic storm (Dst = −61 nT) that was caused by a moderate solar wind plasma stream compounded with the impact of two coronal mass ejections. The most intense phase scintillation (σ[subscript Φ] ~ 1 rad) occurred in the cusp and the polar cap where it was co-located with a strong ionospheric convection, an extended tongue of ionisation and dense polar cap patches that were observed with ionosondes and HF radars. At sub-auroral latitudes, a sub-auroral polarisation stream that was observed by mid-latitude radars was associated with weak scintillation (defined arbitrarily as σ[subscript Φ] < 0.5 rad). In the auroral zone, moderate scintillation coincided with auroral breakups observed by an all-sky imager, a riometer and a magnetometer in Yellowknife. To overcome the limited geographic coverage by GISTMs other GNSS data sampled at 1 Hz can be used to obtain scintillation proxy indices. In this study, a phase scintillation proxy index (delta phase rate, DPR) is obtained from 1-Hz data from CHAIN and other GPS receivers. The 50-Hz and 1-Hz phase scintillation indices are correlated. The percentage occurrences of σ[subscript Φ] > 0.1 rad and DPR > 2 mm s[superscript −1], both mapped as a function of magnetic latitude and magnetic local time, are very similar. National Science Foundation (U.S.) (Grant ATM-0856093) 2013-08-30T15:52:03Z 2013-08-30T15:52:03Z 2013-05 2013-04 Article http://purl.org/eprint/type/JournalArticle 1432-0576 0992-7689 http://hdl.handle.net/1721.1/80331 Prikryl, P., R. Ghoddousi-Fard, B. S. R. Kunduri, E. G. Thomas, A. J. Coster, P. T. Jayachandran, E. Spanswick, and D. W. Danskin. “GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm.” Annales Geophysicae 31, no. 5 (May 6, 2013): 805-816. en_US http://dx.doi.org/10.5194/angeo-31-805-2013 Annales Geophysicae Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ application/pdf Copernicus GmbH Copernicus |
| spellingShingle | Prikryl, P. Ghoddousi-Fard, R. Kunduri, B. S. R. Thomas, E. G. Jayachandran, P. T. Spanswick, E. Danskin, D. W. Coster, Anthea J. GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm |
| title | GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm |
| title_full | GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm |
| title_fullStr | GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm |
| title_full_unstemmed | GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm |
| title_short | GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm |
| title_sort | gps phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm |
| url | http://hdl.handle.net/1721.1/80331 |
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