Магнитосферные возмущения и результаты измерений в стратосфере за период проведения эксперимента «Самбо-79»/ Л. Л. Лазутин, В. А. Жавков, Т. А. Козелова [и др.]; Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т и др. – Препринт ПГИ 80-1.

network of stations in Sweden, on the Kola peninsula, In Karelia, Arkhangelsk region and Novaya Zemlia was supplied with observatories and scientific groups which cooperated in work according to IMS program. Geophysical observations made in Finland (Kataja E., fillinen B.) are of special Importance and the data are extremely useful for the results of the SAMBO experiments. X-ray spectrometere were the main instruments onboard the balloons. They were constructed on the basis of an scintillation detector with NaJ(Tl) crystal. The crystal was cilinder-shaped with the following dimentions: 70x20 mm on the Soviet payloads, 75x15 mm on the French and 25x25 mm on the Austrian ones. The French and Austrian spectrometers had collimators with the view field of 30° while the Soviet spectrometers had none. The Soviet payloads had additional detectors of electric and magnetic fields (horizontal compo nents), aurora photometers, detectors with five spectrome ters for measurements of electron precipitation spatial structure. The French payloads had also detectors of the electric and magnetic fields, a four-channel scaning aurora photometer, X-ray TV (an instrument for making X-ray pictu res of the aky) and a photometric camera. Austrian payloads had detectors of the electric and magnetic fields and photo meters. Technical description of the Soviet payload instrum ents are given in /1/, Table 1 gives an instrument set for every separate payload. The SA11BO-79 experiment was held in January-J4arch,1979. During this period 18 balloons were successfully launched, ten of them had French payloada, 2 Austrian and 6 Soviet ones. Table 1 gives a list of flights, the starting time, payload construction, working time, the information obtained. Flight trajectories are given in Fig.1a,b,c,d. Balloon investigations are successful under the following conditions: Kp dally sum of magnetic disturbances must exceed 25; stratospheric wind conditions must secure 6-hour duration of balloon flights for receiving information at ground stations; the ground-layer wind must not exceed the velocity of 5 m/sec. (the security launching requirement). 24