The characteristic feature of INTERBALL project is the realization of multi point simultaneous measurements at different altitudes provided by two main satellites together with two subsatellites, each of which is launched into orbit as the passenger of its main satellite.

The main purpose of the subsatellites in the INTERBALL Project is to perform systematic complex studies in the tail polar magnetosphere, magnetosheath and solar wind, of spatial structures of individual space plasma processes, ambient plasma parameters and cause-and-effect relationships by performing measurements synchronized with those made on the main satellite. Measurements at two different points in space for each satellite-subsatellite pair - if their relative positions are known - enable one to distinguish reliably (in one direction, at least) the locations and motions of various plasma structures and/or inhomogeneities in space from the purely time variation of the medium parameters, which is very important for the correct interpretation of experimental results.

Magion-4 Sessions List  (1995-1997).   

The spacecraft of Magion type have been selected as the subsatellites of the Interball project: Magion-4 (C2-X) for the Tail Probe and Magion-5 (C2-A) for the Auroral Probe. The concept of the small subsatellite for the Prognoz type spacecraft was realized for the first time in this project. Magion-4 was produced in the Czech Republic in collaboratrion with Russia, Ukraine, Hungary, Austria and has onboard scientific instruments and sensors designed and built in Czech Republic, Russia, Poland, Hungary, Romania, Bulgaria and Slovak Republic.

It has a mission design lifetime of 2 years.

Magion-4 - Interball1: subsatellite-satellite time difference in ascending nodes.

Principal Technical Characteristics

Selection of scientific payload

As it follows from their main objectives, the measurements made aboard the subsatellites should be adequate to those made aboard the main satellite, as much as it is allowed by the smaller size and weight. Considering everything that has been said above, the following set of scientific payload for the MAGION-4 subsatellite was selected:
  1. Wave complex KEM-3 (Czech Republic, Bulgaria)
  2. Spectrum analyzer SAS (Poland)
  3. Wave-form analyzer ULF (Czech Republic, Hungary)
  4. Three-component magnetometer SG-R8 (Romania)
  5. Energetic electron and proton spectrometer DOK-S (Slovak Republic)
  6. Plasma electron and proton spectrometer MPS, SPS (Czech Republic, Russia).
  7. X-ray photometer RF (Czech Republic)
  8. Plasma flow detector VDP-S (Czech Republic, Russia)
  9. Two-component current Langmuir probe LSP (Russia, Czech Republic).

List of scientific measurements aboard
MAGION-4 subsatellite

1. Magnetic field measurements: 3 axes 0 - 10 Hz.
2. ULF waves: 3 axes, search-coils; 1-10 Hz or 1-30 Hz filters; telemetry: 12 bit ADC; dynamical range 76 dB.
3. ULF/ELF waves: 3 axes search-coils, filterbank (8 channels) 10 Hz - 2 kHz and subcarrier (IRIG) analog telemetry channel.
4. VLF waves: 1 axis, search-coil detector, filterbank (8 channels) in the range 8 Hz - 40 kHz. Spectrum analyzer SAS with 64 frequency steps, 400 Hz - 20 kHz; broad-band analog telemetry channel.
5. Electric fields and waves: 1 axis in the range 0,1 Hz - 400 kHz, set of filters (8 channels). Spectrum analyzer SAS: 64 steps, (1 step - 20 ms), 32 Hz - 2 kHz or 96 steps, 1 - 400 kHz, wide-band analog telemetry (60 kHz max), subcarrier (IRIG) analog telemetry channel.
6. Ion flux fluctuations 10-12 - 10-10A, (4sensors, spaced at 120 deg.)
7. Energetic particles - solid-state spectrometer for electrons 20-230 keV and protons 20 keV - 1,3 MeV, 2 directions: antisunward the Sun and perpendicular to it.
8. Plasma particles - electrostatic analyzer MPS, electrons and protons 0,2 - 20 keV, axes in the directions of the + and - Z subsatellite axis, i.e. toward the Sun and antisunward, on 16 energy levels.
9. Plasma particles - multidirectional electrostatic analyzer SPS for electrons and protons 0,2 - 20 keV, 16 energy levels.
10. Solar X-ray photometer two energy bands: 10-15 keV, 15-60 keV
11. Two-components current Langmuir probe: 0,3 Hz - 50 kHz

Interball project scientist A.A.Galeev
Deputy Interball project scientist L.M.Zeleny
Interball technical managers L.V.Pesotsky, E.M.Vasilyev
Subsatellite technical manager from Russia Yu.N. Agafonov
Space Research Institute, Russian Acad. Sci., Moscow, Russia.

Subsatellite project scientist from Czech side P.Triska
Subsatellite technical manager from Czech side J.Vojta
Institute of Atmospheric Physics, Czech Acad. Sci., Prague, Czech Republic.

Back to the Interball Home Page

Last updated 3 Jun 97