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Measurements of the ionosphere plasma electron density variation by the Kharkov incoherent scatter radar

100%

Cherniak I. , Lysenko V.

tom Vol. 61, no. 5

1289--1303

The present paper is devoted to the description of an improved method for determination of the ionospheric electron density values by Kharkov Incoherent Scatter Radar. This method allows to improve the resolution of the incoherent signals parameters up to ∼20 km in the range of 100–400 km and ∼100 km in the range of 200–1100 km. This approach was used to investigate variability of the ionospheric electron density over East European region in the heights interval of 100–1000 km during the period from 2003 to 2008, including case-studies of solar eclipses and ionospheric storms.

Śmierć Pańska i zaćmienie Słońca. Jana z Głogowa (1445–1507) rozważania o cudownym zjawisku astronomicznym

72%

Zawadzki R. K.

2018

tom 27

nr 3

263-274

Arranged by topics, the essay covers the early sixteenth – century "Introductorium compendiosum in Tractatum sphaerae materialis Ioannis de Sacrobusto" written in Latin by the Polish scholar Jan of Głogów. The essay explores diverse aspects of his deliberations about the eclipse of the sun which was said to happen during the time of Christ’s death. In Jan`s opinion which was based on astronomical knowledge and ancient writers` judgments, the blocking of the light of the sun when the moon was between it and the earth, was a miraculous event which did not follow the known physical laws of nature and was therefore thought to be caused by God.