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
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
Considering everything that has been said above, the following set
of scientific payload for the MAGION-4 subsatellite was selected:
- Wave complex KEM-3 (Czech Republic, Bulgaria)
- Spectrum analyzer SAS (Poland)
- Wave-form analyzer ULF (Czech Republic, Hungary)
- Three-component magnetometer SG-R8 (Romania)
- Energetic electron and proton spectrometer DOK-S (Slovak
- Plasma electron and proton spectrometer MPS, SPS (Czech
- X-ray photometer RF (Czech Republic)
- Plasma flow detector VDP-S (Czech Republic, Russia)
- Two-component current Langmuir probe LSP (Russia, Czech
List of scientific measurements aboard
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
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
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 firstname.lastname@example.org
Deputy Interball project scientist L.M.Zeleny email@example.com
Interball technical managers L.V.Pesotsky, E.M.Vasilyev firstname.lastname@example.org
Subsatellite technical manager from Russia Yu.N. Agafonov email@example.com
Space Research Institute, Russian Acad. Sci., Moscow, Russia.
Subsatellite project scientist from Czech side P.Triska firstname.lastname@example.org
Subsatellite technical manager from Czech side J.Vojta email@example.com
Institute of Atmospheric Physics, Czech Acad. Sci.,
Prague, Czech Republic.
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Last updated 3 Jun 97