Sentences with phrase «by ionospheric»

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In the case of the 2011 quake, the Gravity Recovery and Climate Experiment (GRACE) satellites orbiting Earth captured the significant ionospheric signature produced by the quake's infrasonic wave output.

Our aim with this project was to develop ionospheric techniques that can be used more widely by researchers across the world.

The ionosphere is suggested to be directly coupled with the polar vortex and may vary it by strong variations of ionospheric winds.

It is triggered by an alert signal for upcoming ionospheric disturbances obtained from the online analysis of the IMF's observations obtained from ACE spacecraft.

The most important feature of the cross-correlation analysis is that for all months the ionospheric response is composed by two phases, positive and negative, with different duration and different time delay.

The modeling approach is based on presenting the ionospheric parameter (most frequently the F - layer critical frequency foF2) by analytical expressions as a function of one or more geomagnetic or solar indices, called drivers.

The quiet - time behavior of the ionospheric electron density peak height of the F2 region, hmF2, has been evaluated from average electron density profiles and analytically modeled by the Spherical Harmonic Analysis (SHA) technique following the same methodology as described by Altadill et al. (2009).

STIM provides a correction factor to the quiet diurnal ionospheric variation during storm conditions, which are determined by monitoring IMF conditions in the Earth's vicinity.

Since the solar EUV radiation varies by a factor of about 2 within a solar cycle (Lean et al. 2003), it is expected that the ionospheric TEC is highly correlated with solar activity changes.

Then, as the ionospheric response evolves and recovers on its own time scales, STIM estimates the time delay in the ionospheric storm onset and formulates the ionospheric storm - time response by taking into account the latitude and the LT of the observation point at the storm onset.

In particular, ionospheric disturbances caused by large - scale phenomena such as the prolonged negative and positive effects observed all over Europe are sufficiently captured in ΔR12eff variation from the onset of the disturbance until the full recovery (Fig. 16).

A joint study carried out by the Finnish Meteorological Institute and the Sodankylä Geophysical Observatory of the University of Oulu has developed ionospheric electron density imaging techniques.

Ionospheric Anomalies around the Time of the Powerful Nabro's Eruption Triggered by June 12, 2011 Earthquakes