Adjective:

அரசுரிமை வாய்ந்த,

roral's Usage Examples:

Even smaller mean values have been found for the angle between the auroral and magnetic " zeniths " - as the two directions have been called - e.

Baly (21), making use of the observations of the Russian expedition in Spitsbergen in 1899, accepts as the wave-lengths of the three principal auroral lines 557 o, 4276 and 3912; and he identifies all three and ten other auroral lines ranging between 5570 and 3707 with krypton lines measured by himself.

Sunlight is not the only disturbing cause in estimates of auroral frequency.

We present evidence for the observation of high aspect angle HF radar backscatter from the auroral electrojets.

If an auroral arc represented a definite selfluminous portion of space of small transverse dimensions at a uniform height above the ground, its height could be accurately determined by observations made with theodolites at the two ends of a measured base, provided the base were not too short compared to the height.

The majority of the krypton lines which Baly identifies with auroral lines require for their production a Leyden jar and spark gap.

It is shown, for instance, in Loomis's auroral data, which are based on observations at a variety of European and American stations (Ency.

In this instance plasma convection appeares to play the dominant role in forming the large-scale spatial structure of the nightside auroral ionosphere.

Very elaborate observations have been made during several Arctic expeditions of the azimuths of the summits of auroral arcs.

In addition to these, he mentions other auroral lines as very probably krypton lines, but in their case the wave-lengths which he quotes from Paulsen (22) are given to only three significant figures, so that the identification is more uncertain.

2 The mean sun-spot frequencies in the two periods differ by only I %, but the auroral frequency in the later period is 45% in excess of that in the earlier.

The auroral data are from Table E of Tromholt's catalogue (5), with certain modifications.

Rubenson (14), from whom Tromholt derives his data for Sweden, seems to accept this view, assigning the apparent increase in auroral frequency since 1860 to the institution by the state of meteorological stations in 1859, and to the increased interest taken in the subject since 1865 by the university of Upsala.