Аскаплоты советских станций за 1982 год : (оперативно-информационный материал) / Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т. – Апатиты : Кольский филиал АН СССР, 1989.

9 DESCRIPTION OF ASCAPLOTS. Introduction, The present issue contains observational data obtained by all-sky cameras at ten Soviet stations during 1982, six of them are located in the Arctic and four in Antarctic. The stations are enumerated in Table 1. The third column contains conventional designations of the stations according to the Agreement adopted during IGY /1,2/. The stations which did not operate during IGY obtained their designations in the same way compiling their ordinal numbers and three Latin letters denoting the name of the station. Corrected geomagnetic coordinates calcinated from the Gustafsson's data /3/ and geographical coordinates are given in the 4th and 5th columns, respectively. The 6th column presents local geomagnetic midnight in UT for a given station. The last but one column contains the institution running the observations, the last column gives the name of the observer-in-chief. According to Moscow IAGA Assembly resolution of 1958 it is desirable when using ascafilms to refer to or to give the name of the person who obtained the ascafilms. Auroral data are presented by ascaplots as adopted at Moscow IAGA Assembly in 1958. The methods of ascaplotting were offered by V.Stoffregen who was the editor of two volumes of ascaplot data from the global network of stations for 1957-1958 and 1958-1959 /1,2/. Separate publications with ascaplots of Alaskian and Canadian networks of stations appeared occasionally The ascaplots of Loparskaya station for 1970-1979 are published in /4/. Auroral observational data from Soviet Arctic and Antarctic stations for 1972-1981 are published in /5/. Ascaplots help to obtain operative informa tion about the time and place of aurorae observations and of some aurorae parameters. Moreover, identical presentation of data from different stations with a sufficiently large amount of observations allows to carry out scientific research. Instruments and the program of observations. Observations at Soviet stations were carried out by all-sky cameras designed by Prof.A.I.Lebedinsky /6/. The optical system of the instrument consists of two spherical mirrors and a camera working automatically from a command apparatus operated by a contact chronometer. The program of observations envisaged synchronous per minute filming with 20 s exposure centered to the zero second during the whole dark time when atmospheric precipitations are absent. For aurorae occuring in the zenith or in case of increase of aurora brightness up to 2 balls and more an additional 5 a exposure was turned up. Filming began and was over at the solar zenith angle 99°. In this case the stars of the second stellar magnit ude are seen at the sky background. A patrol filming with 20 s exposure was taken every 5 minutes during complete or partial cloudness and auroras absence. Observations on the whole network of stations were run in Universal Time. Filming was carried out on the Soviet 35-mm KN-4 film. The sensitivity range of dynamic brightness of Soviet ascafilms equals to the order of two. Each film has a standard sensitive wedge made by an FSR-4 sensitometer. All the negatives of the stations enumerated in Table 1 are kept in the Auroral Subcentre of the World Data Centre WDC B2 located in Apatity (address: Auroral Subcentre, Polar Geophysical Institute, Kola Science Centre USSR Academy of Sciences, 184200 Apatity, Мшлшпзк region, USSR).