Ionospheric response to the 14 December 2020 total solar eclipse in South America

2021 ◽  
Author(s):  
Demián D. Gómez
Keyword(s):  
South America ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Ionospheric Response

scholarly journals Prediction of the Ionospheric Response to the 14 December 2020 Total Solar Eclipse Using SUPIM‐INPE

2020 ◽  
Vol 125 (11) ◽  
Author(s):  
M. Martínez‐Ledesma ◽  
M. Bravo ◽  
B. Urra ◽  
J. Souza ◽  
A. Foppiano
Keyword(s):  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Ionospheric Response

scholarly journals Ionospheric response to total solar eclipse of 22 July 2009 in different Indian regions

2013 ◽  
Vol 31 (9) ◽  
pp. 1549-1558 ◽  
Author(s):  
S. Kumar ◽  
A. K. Singh ◽  
R. P. Singh
Keyword(s):  
Total Electron Content ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Lower Atmosphere ◽  
Electron Content ◽  
Vertical Total Electron Content ◽  
Total Electron ◽  
Ionospheric Response ◽  
Total Electron Content Data ◽  
Photoionization Process

Abstract. The variability of ionospheric response to the total solar eclipse of 22 July 2009 has been studied analyzing the GPS data recorded at the four Indian low-latitude stations Varanasi (100% obscuration), Kanpur (95% obscuration), Hyderabad (84% obscuration) and Bangalore (72% obscuration). The retrieved ionospheric vertical total electron content (VTEC) shows a significant reduction (reflected by all PRNs (satellites) at all stations) with a maximum of 48% at Varanasi (PRN 14), which decreases to 30% at Bangalore (PRN 14). Data from PRN 31 show a maximum of 54% at Kanpur and 26% at Hyderabad. The maximum decrement in VTEC occurs some time (2–15 min) after the maximum obscuration. The reduction in VTEC compared to the quiet mean VTEC depends on latitude as well as longitude, which also depends on the location of the satellite with respect to the solar eclipse path. The amount of reduction in VTEC decreases as the present obscuration decreases, which is directly related to the electron production by the photoionization process. The analysis of electron density height profile derived from the COSMIC (Constellation Observing System for Meteorology, Ionosphere & Climate) satellite over the Indian region shows significant reduction from 100 km altitude up to 800 km altitude with a maximum of 48% at 360 km altitude. The oscillatory nature in total electron content data at all stations is observed with different wave periods lying between 40 and 120 min, which are attributed to gravity wave effects generated in the lower atmosphere during the total solar eclipse.

scholarly journals GPS-TEC observations over Nepal during the Total Solar Eclipse on 22 July 2009

2021 ◽  
Vol 7 (1) ◽  
pp. 54-59
Author(s):  
A. N. Shrestha ◽  
Y. Migoya-Orue
Keyword(s):  
Global Positioning System ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Electron Content ◽  
Positioning System ◽  
Total Electron ◽  
Ionospheric Response ◽  
Gps Tec ◽  
Global Positioning ◽  
Geographical Locations

This paper explores the ionospheric response in terms of Total Electron Content (TEC) during the 22 July 2009 Total Solar Eclipse. Using the data stored at Biratnagar (BRN2), Ramite (RMTE), Dhangadhi (DNGD), Nepalganj (NPGJ), and Taplejung (TPLJ) Global Positioning System (GPS) stations, the ionospheric activity was investigated through changes in TEC. Our research is based on GPS-TEC measurements from a widely dispersed GPS network across various geographical locations in Nepal, taking place on July 17-21 as a pre-event, July 22 as the main event, and July 23-27 as a post-event. The analysis reveals that the reduction in the TEC level is proportional to the magnitude of the total solar eclipse. The variation of the TEC depends on latitude as well as longitude. We found that TEC depletion was up to 5% from pre-event to main-event and up to 30% from main-event to post-event during the totality of the eclipse. The eclipse was accompanied by the 10-hour geomagnetic storm in Nepal, which was the explanation for the TEC upgrade to 50% on the main event day from pre-event and decreased by 25% from main-event to post-event. The result obtained in this work demonstrates the influence of the eclipse/storm on the variation of TEC.

The astronomical heritage of pre-Hispanic societies in Venezuela: Total Eclipses of Sun reported in Petroglyphs

2019 ◽  
Vol 15 (S367) ◽  
pp. 255-259
Author(s):  
Nelson Falcón ◽  
Alcides Ortega
Keyword(s):  
South America ◽  
Material Culture ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
The Sun ◽  
Astronomical Observations ◽  
Computerized Simulation ◽  
Almost All

AbstractAstronomical observations have been documented in pre-Hispanic cultures. However, little is known about the astronomical heritage of pre-Hispanic societies in Venezuela, since there are no evidence of an ancestral material culture as other regions of Meso and South America, and these native Venezuelan groups lacked a written, alphabetic or ideographic language. There are innumerable petroglyph deposits in almost all regions of Venezuela, especially near Lake Valencia (Carabobo state) and those of the Andean foothills (Barinas state). By means of computerized simulation and archaeoastronomy techniques, the occurrence of a total solar eclipse is verified: in July 1, 577 at the Vigirima site; and another total solar eclipse at noon on May 16, 1398 at the Bum Bum site. It is concluded that the contemplation of the total eclipses of the Sun, must lead to the need for communication and recording, and lacking any type of writing, they drew the phenomenon, using the techniques and means at their disposal: engraving on rocks.

Ionospheric response to the total solar eclipse in India on 22 July, 2009

2010 ◽  
Author(s):  
Vishal Chauhan ◽  
Shikha Agrawal ◽  
O. P. Singh ◽  
Birbal Singh ◽  
Sandip K. Chakrabarti
Keyword(s):  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Ionospheric Response

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

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