Effects of the August 11, 1999 total solar eclipse as deduced from total electron content measurements at the GPS network

Solar flare signatures of the ionospheric GPS total electron content

6 [1] In this study, ionospheric solar flare effects on the total electron content (TEC) and 7 associated time rate of change (rTEC) derived from ground-based global positioning 8 system (GPS) receivers in the midday region are examined. The occurrence times and 9 locations of 11 solar flares are isolated from the 1–8 Å X-ray radiations of the 10 geosynchronous operational environmental satelli...

Neutral points of skylight polarization observed during the total eclipse on 11 August 1999.

We report here on the observation of unpolarized (neutral) points in the sky during the total solar eclipse on 11 August 1999. Near the zenith a neutral point was observed at 450 nm at two different points of time during totality. Around this celestial point the distribution of the angle of polarization was heterogeneous: The electric field vectors on the one side were approximately perpendicul...

The ionospheric responses to the 11 August 1999 solar eclipse: observations and modeling

A total eclipse occurred on 11 August 1999 with its path of totality passing over central Europe in the latitude range 40–50 N. The ionospheric responses to this eclipse were measured by a wide ionosonde network. On the basis of the measurements of foE, foF1, and foF2 at sixteen ionosonde stations in Europe, we statistically analyze the variations of these parameters with a function of eclipse ...

Solar radiation during a total solar eclipse

modeling and interpolation of ionosphere total electron content using artificial neural network and gps observation

global positioning system (gps) signals provide valuable information about ionosphere physical structure. using these signals, can be derived total electron content (tec) for each line of sight between the receiver and the satellite. for historic and other sparse data sets, the reconstruction of tec images is often performed using multivariate interpolation techniques. recently it has become cl...