Аскаплоты советских станций за 1979 год : (оперативно-информационный материал) / Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т. – Апатиты : Кольский филиал АН СССР, 1982.

II ASCAPLOT DESCRIPTION. The present іваие contains auroral observational data obtained from all-sky cameras constructed by Prof.АЛ.Lebedinsky /1/ placed at 8 arctic and 4 antarctic stations during 1979« The list of stations is given in Table 1. The third colomn presents convensional designation of each station adopted in tabled. Geographical and geomagnetic coordinates calculated according to Gustafsson's data /2/ are presented in the 4th and 5th colomns. The sixth colomn contains local geomagnetic midnight in universal time for the given station. The last but one colomn nominates the institute carrying out observations; the last colomn denotes the name of the person responsible for observations. According to Moscow IAGA Assembly resolution of 1958 when using ascafilms it is desirable to refer or to nominate the person responsible for taking ascafilms. Auroral data are presented by ascaplots as adopted at Moscow IAGA Assembly in 1958. The methods of ascaplotting were suggested by W.Stoffregen who edited two ascaplot volumes of 1957-1958 and 1958-1959 based on the data from the world net work of stations /3,4/, Ascaplots contain half-an-hour information about auroral location and its activity; the information is centred on the begining and the middle of each univers al time hour and encoded in 5 lines devided by vertical lines into half-an-hour intervals. Three upper lines denote aurorae location in the sky. Blackening of the first, second and third upper lines corresponds to auroras in the north (from 80° to 60°N of the zenith angle), in the zenith (60°N-60°S) and in the south (60-80°S) respectively. Supposing the height of aurora is nearly 100 km, each spatial interv al corresponds to 3 degree of latitude, Vertical lines and dote inside the square mean respectively complete and partial cloudiness in the given spatial interval. Horizontal lines over ascaplots denote considerable moon lighting whereas ticks inside the square point out bad quality of the ascafilm due to technical reasons. Bad oamera focusing was denoted by dashes under the ascaplots. Two bottom lines of the squares carry the information about auroral activity in the zenith. Blackening of the fifth line or the fifth with fourth lines means 2 or 3 ball auroral activity respectively. It should be noted that activity balls in ascaplots do not entirely correspond to international brightness coefficient. In this case series of auroral activity offered in /5/ characterized by auroral intensity, duration, form and connection with subatorm development was taken as a basis. Observations were carried out during the whole dark period at the Solar zenith angle more than 99° when atmospheric precipitation was absent. Table 2 gives average auroral activity indices for each day. In accordance with /6/ these indices were determined from ascaplots and they characterize general planetary activity. The digit in brackets shows the number of stations which supplied the data for averaging. Ascaplots obtained during 1972-1974 and 1977-1978 at Soviet stations are given in /7-11/. The methods of ascaplotting are described in details in /11/. All ascafilms recieved from the stations enumerated in Table 1 are kept in the Auroral Subcenter of the World Data Center TOC B2 located in Apatity (address: Auroral Subcenter, Polar Geophysical Institute, Kola Branch of the USSR Academy of Sciencea, 184200 Apatity, Murmansk region, USSR).