Intercosmos-19 satellite

Intercosmos-19 was launched on 27 Feb. 1979 on elliptical orbit 996-502 km with inclination 74 and was active until middle of 1982. The main advantage of the platform was complex study of near-earth environment what decided on the success of the mission. The local plasma parameters (electron and ion density, electron and ion temperature, ion composition) were measured together with remote electromagnetic monitoring (topside sounder, VLF and HF wave measurements) what gave possibility for 3-D study of electron density distribution and its dynamics, wave-plasma interactions, energy transformation. It was one of the first and most successful Soviet complex geophysical satellite platforms which laid foundation to the Soviet (and later Russian) Space Weather program. Another very large advantage of the platform was the long-range memory. It was possible to record information from all devices during 16 hours continuously, and after refreshing, the recording was continued. So, it was real monitoring system, which gave possibility to do the real global survey, to study the day-to-day dynamics of the effects and their variability. The data base contains more than 20 Gbytes of digital information. Practically all topside sounder data from Intercosmos-19 satellite are now recovered and put in the digital database.

 

The satellite payload consisted from:

         Topside sounder IS-338, frequency range 0.3 15.95 MHz, full frequency scan for 5.6 s, ionograms were recorded every 8 s, 16 s, 32 s, 64 s depending on the telemetry sampling rate.

         Langmuir probe P-4, concentration range 103 106 cm-3 for electrons and 103 - 8×105 cm-3 for positive ions

         Electron temperature probe KM-3 with floating potential, electron temperature range 600 12000 K.

         Optical electrophotometer EMO-1, atmospheric emissions up to 50 R in spectral lines 427,8 557.7 and 630 nm, the device was looking by 70 to nadir direction

         Soft electron spectrometer SF-3, differential electron and ion fluxes 10 eV 10.8 keV for electrons and 10 eV 9.3 keV for ions with accuracy 20 % in energy and 30 in pitch-angle distribution

         High energy particle telescope Pero-3I, electron fluxes with energey E > 40 keV, and protons from 1 to 30 MeV

         VLF complex ANCh-2ME, electric and magnetic components. Wide band (70 Hz 20 kHz) and narrow-band (10 frequencies) receivers

         HF wide-band receiver 0.1 5 MHz AVCh-2 with wideband telemetry transmitter AVCh-2T, electric component.

         HF swiping radiospectrometer IRS-1 0.1 6.0 MHz, electric component

         Mass-spectrometer NAM-4 for ion and neutral composition measurements. Mass range 1 60 m.u. with concentration from 102 to 106 cm-3, time resolution 250 ms.

 

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