التفاصيل البيبلوغرافية
| العنوان: |
Ionospheric response to the total solar eclipse in India on 22 July, 2009. |
| المؤلفون: |
Chauhan, Vishal1, Agrawal, Shikha2, Singh, O. P.1, Singh, Birbal2 |
| المصدر: |
AIP Conference Proceedings. 10/20/2010, Vol. 1286 Issue 1, p188-199. 12p. |
| مصطلحات موضوعية: |
*SOLAR eclipses, *VLF radio wave propagation, *IONOSPHERIC radio wave propagation, *IONOSPHERIC electron density, *GLOBAL Positioning System, *GEOMAGNETISM, *DATA analysis, 2009 |
| مصطلحات جغرافية: |
AGRA (India), INDIA |
| مستخلص: |
Since The variations of Total Electron Content (TEC) and amplitude of the fixed frequency VLF transmitter signal (f = 19.8 kHz, NWC, Australia) are studied at Agra (Geographic Lat. 27.2°N, Long. 78°E), India during the total solar eclipse of 22 July, 2009 which was longest seen in India ever since 18 August, 1968. The equipment used for the study are a dual frequency GPS receiver (GSV 4004V) and a Soft PAL (Software based phase and amplitude logger) receiver. The data for a period of fifteen days (±7 days from the date of the event) are analysed and it is found that the TEC decreased by about 30% from normal days during the total solar eclipse, and the amplitude of the VLF signal also decreased likewise. The period of the data analysis is characterised by a low level of geomagnetic activity, hence the decrease in TEC and amplitude of the VLF signal is unlikely to be influenced by geomagnetic disturbances. The results are interpreted in terms of depression in electron densities at all ionospheric heights and are consistent with those obtained by earlier workers during similar eclipse events. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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