Аскаплоты полярных сияний за 1985-1986 гг. / Рос. акад. наук, Кол. науч. центр, Поляр. геофиз. ин-т. - Апатиты : КНЦ РАН, 1997. - 92 с.

INTRODUCTION The Auroral Subcenter of World Data Center B2 continues this issue its publication of aurora observational data obtained at former Soviet stations in Arctic and Antarctic regions. This issue contains the data taken during the years o f 1985 and 1986. Auroral data are presented in form o f ascaplots as adopted at Moscow IAGA Assemly in September, 1958. The list of stations and their co-ordinates are shown in Tables 1 and 2. Ascaplots o f 1972-1984 were published earlier/4/. Ascaplots present the information on aurora occurrence in three latitudinal intervals (north, zenith, south) each corresponding to three degrees o f latitude. Auroral activity in the zenith region is given in three ball scale. Data are given for half hour intervals of observations. The ascaplots contain information about clouds and moon lighting as well. The technique of ascaploting is shown. Original data from all stations are stored in the Auroral Subcenter. The ascaplots have been prepared by L.N.Smirnova and N.N.Safargaleeva the workers o f Auroral Subcenter. Indices o f auroral activity have been calculated by L.N.Smirnova. DESCRIPTION OF ASCAPLOTS INTRODUCTION. The present issue contains publication of auroral data obtained by all sky cameras at former Soviet stations during the years of 1985-1986. The stations are listed in Table 1 and 2. The third column presents conventional designations of stations according to the Agreement adopted at IGY /1,2/. The stations that did not operate during IGY (the number after 115) obtained their designations in the same way by compiling their ordinal numbers and three Latin letters denoting the name of the station. Geographic and corrected geomagnetic co-ordinates (calculated after /3 f) are given in the 4th and 5th columas, respectively. The 6th column presents local geomagnetic midnight in UT for the given station. The last but one column lists the names o f the observers in chief. According to Moscow IAGA Assembly resolution of 1958 it is desirable, when using askafilms, to refer to or name the person who obtained the askafilms. Auroral data are presented in the form of ascaplots as adopted at Moscow IAGA Assembly in 1958. The technique of ascaploting was suggested by V.StofTtegen who was the editor o f two volumes of ascaplot data from the global network of stations for 1957-1958 and 1958-1959 /1,2/. Separate publications with ascaplots of Alaskan and Canadian network o f stations appeared occasionally. Auroral observational data of Arctic and Antarctic stations for 1972-1984 were published in /4/. Ascaplots provide operative information about the time and place of auroral observations and about some auroral parameters. INSTRUMENTS AND PROGRAM OF OBSERVATIONS. Observations at former Soviet stations were carried out by all sky cameras designed by Prof. A.I.Lebcdinsky /5 /. Tire optical system of the instrument consists of two spherical mirrors and a camera working automatically. The program of observations included synchronous per minute filming with 20 s exposure (centered to the zero second) during the whole dark time when atmospheric precipitations were absent. For auroras occurring in the zenith or in the case o f increased auroral brightness up to index 2 and more an additional 5 s exposure was turned on. Filming started and ended at the solar zenith angle of 99. Under such conditions the stars of the 2d stellar magnitude are seen at the sky background. A patrol filming with 20 s exposure was taken every 5 minute at complete or partial clouds. Observations at the whole network of stations were run in UT. All the negatives o f the stations are stored in the Auroral Subcenter o f World Data Center WDC B2 in Apatity (Auroral Subcenter, Polar Geophysical Institute, Apatity, Murmansk region, 184200, Russia). METHODS OF ASCAPLOTING. information about auroras for every station according to /1,2/ is encoded in 5 lines divided by vertical tors. One vertical division corresponds to a lialf-an-hour interval centered at the beginning and middle of each hour 10