MAGION 5 - Technical Data

Name INTERBALL subsatellite S2-A
Orbit
-perigee altitude
about 800 km (changing)
-apogee altitude 20 000 km
Inclination about 65°
Orbit time 347.4 min
Stabilization rotation 0.5 r.p.m.
Orientation: spin axis towards the Sun
Mass 68.5 kg
Power of the solar battery 36 W
Character. of the chemical battery 12 Volts/ 4 Ahours
Orbit correction unit Gas-jet correction engine
Total momentum 300 N.s
Thrust of a pair of nozzles 0.2 N
Telemetry system transmitters 136.07 MHz
137.15 MHz
400.24 MHz
400.57 MHz
1534.75 MHz
Command radioline receivers 149 MHz Band
450 MHz Band
Digital data transmission rates 40.96 kbit/s
20.48 kbit/s
5.12 kbit/s
1.28 kbit/s
Command transmission rate 61 or 122 bit/s
Digital memory capacity 4 Mbyte
Analog memory capacity 180 s ( 2.3 kHz )
Wide-band analog telemetry 10 Hz - 60 kHz
Subcarrier frequency f0 ±15% 1.3 kHz
2.3 kHz
Subcarrier frequency delta f~1KHz 24 kHz
32 kHz
Subcarrier frequency of the SSB 40.96 kHz

 

Solar battery SB1-8: 14+4 parallel connected panels, 196×196 mm, 0.2A, 14V, total powermax at the nominal solar orient. is 36W.

Accumulator batteries XB1,2: 10 nickel-cadmium hermetic accumulators VARTA type RSQ-4 (4 amp.hours)

Voltage DC/DC converters the efficiency coefficient of the converters exceeds 0.8 and the switching freq. is 40.96 kHz synchronized by telemetry bit frequency.

Primary MPA,B and MPCperforms the following functions:

  • inversion of the voltage sign of the solar battery
  • galvanic separation of solar battery from the primary circuit
  • voltage limiting (output voltage is realized at the level of 14.5V)

Secondary MAA,B: are used for the analog circuits supply, power 10W, output voltages are ±10V and ±5V.

Secondary MDA,B: serve for power supply of the impulse and digital circuits, power 30W, output voltages are +5V and +30V

Command radio line Receivers PS-4-P PPA,B: antenna – lambda/4 whips real sensitivity is better then 1µV (signal/noise ratio = 12dB) operating frequencies on 149 MHz band.

Receivers FRX453 PPC: antenna – lambda/2 whip operating frequency on 450 MHz band.

Analog decoders ADA,B,C: digital information is transmitted by means of FSK- modulation (L/H) 3784 Hz/4028 Hz.

Digital decoders DDA,B: digital control rate 61 or 122 bit/s, transmission of 32 main single commands and of the digital information: to the controlling µP of the TM-system to the onboard programmer BEV to the block of cont. 8-bit words formation.

Transmitters VSA,B: antenna – omnidirectional lambda/4 whip, the AF modulation band 10 Hz – 60 kHz, frequency stability 10-5

Transmitters VTA,B: antenna – omnidirectional lambda/2 whips the AF modulation band 20 Hz – 80 kHz frequency stability 10-5

Data collecting system STS: includes the onboard computer on the basis of the NSC-800 µP, the largest information block is the main block (512 bytes) consisting of 4 frames of 128 bytes, the output signal from the STS has the form of a bi-phase modulation. operating modes 14 digital and 15 analog channels transmission rate 1.28, 5.12, 20.48 and 40.96 kbit/s frame structures 8 prefixed independent

Cold gas-jet engine system KDU: 10 jets, 6 directions, total impulse 300 Ns thrust of one nozzle 0.1±0.007 N pressure of the balloon 220*105 Pa
pressure at the input 3.1±0.6*105 Pa
balloon volume 1.85 liters

Attitude determination system

Infrared Earth’s sen. HSU,D: a thermistor bolometer is used as a detector of IR radiation of the Earth operating range -60°C to +40°C.

Solar sensor NASS: narrow-angle solar sensor for Sun vector determination, FOV: ±9°

Solar sensors WASS1, 2: wide-angle solar sensors for Sun vector determination, FOV: ±40°

Solar sensor DOS: solar sensor, FOV ±80°

Solar sensor KOS: solar sensor, FOV ±2°

Thermal regime: the following passive means are employed for the thermal control special surface coating to ensure proper emissivity and absorption for thermal regulation metallised multi-layer thermal cover calibrated thermal resistance isolating XB1, XB2 heat pipes to balance subsat. thermal field

Magnetometer SG-R8 – a triaxial flux-gate magnetometer with automatic switching of sensitivity.

Range (nT) Resolution (nT)
±65536 8
±8192 1
±1024 0.125
±128 0.0156

Data from the magnetometer passes through a 14 bit AD converter (1 sign bit).The device has also one analog output.

The magnetometer DMA – a triaxial flux-gate magnetometer.

Range (nT) ±3200 Resolution (nT) 0.096

Bandwidth: 40 and 20 kbit – 10 Hz; 5 and 1.25 kbit – 1 Hz

Wave complex KEM-3 – E and B analog channels, wide-band (60 kHzmax) analog telemetry. Frequency range and sensitivity:

  • 1 component Ex 0.1 Hz – 400 kHz;    5*10-8Hz-1/2 (2 kHz)
  • 1 component Bx 0.1 kHz – 50 kHz;   10-5 nT Hz-1/2 (2 kHz)
  • or one selected component Bx,y,z 0.03 Hz – 3 kHz;  3*10-5 nT Hz-1/2 (2 kHz)
  • dynamical range – AGC 90dB/26dB

Filterbank VLS – 2*8 parallel filters (Ex, Bx), Q=50, dyn. range 72dB

Spectroanalyzer SAS – consists of two SFA analyzers, time transformer and analog telemetry unit.

  • 1 component Ex 1 KHz – 400 KHz (32 – 2000 Hz); 96 steps
  • 1 component Bx 400Hz – 20 KHz; 64 steps
  • 1 component Bx,y,z 32 Hz – 2000 Hz (selected by command); 64 steps
  • intermediate frequencies 465 KHz and 5 KHz

E and B ULF fields – frequency range is designed for collecting and processing information on 3 components of magnetic field and one component of electric field.

  • dynamical range –6 dB/ +30dB by command and 76 dB (12 bit ADC)
  • sampling frequency 280 Hz ( 40 or 20 kbit/s) all 4 components; 70 Hz ( 5 or 1.25 kbit/s) one selected component

Spectrometer DOK-S – is designed to measure the energetic spectrum and angular distribution of energy by means of two pairs of silicon detectors.

  • electron range 20 – 180 keV
  • ion range 20 – 1300 keV

Plasma flow detector VDP-S – is designed for rapid determining of the flux direction variations. Type of registered particles – summa of all ions and electrons with energies above 170 eV.

  • detector type – Faraday cups
  • 4 detectors – 4, ±45° from the main axis
  • angular aperture – 100°

Spectrometer MPS – is designed to carry out a long-period monitoring of the solar wind parameters and to register the ion fluxes in the bow-shock.

  • particles – ions
  • 2 channels – for ions
  • energy range – 0.2 – 20 keV
  • energy resolution < 10%
  • energy levels 16 ( can be varied by command )
  • angular aperture 4° ( in the plane parallel to the main axis )
  • method electrostatic analyzer ( 127°) with channeltron

Spectrometer EPS – is a multidirectional electrostatic analyzer designed for estimating the ion energy and angular distributions.

  • particles – ions/electrons
  • 8 channels for ions
  • 8 channels for electrons
  • energy range 0.2 – 20 keV
  • energy resolution < 10%
  • energy levels 16 ( can be varied by command )
  • angular aperture 8*45° ( in the plane parallel to the main axis )
  • method two toroidal electrostatic analyzers

Cold plasma.KM-14 – is designed for the measurement of basic parameters of cold plasma, consisting of ion density and electron temperature.

  • Te range 1000 – 60000 K, time resolution is 200ms
  • Ni range 107/ 5*1012 m-3

Reg. Aurora borealis VIM – Video Imager System

  • two cameras
    • camera for pictures of dayside of the Earth
    • camera equipped by light intensifier for pictures of Aurora Borealis on the nightside of the Earth
  • spectral range: visible light and near infrared
  • FOV: 20°
  • max. resolution: 512 x 512 pixels

Last updated: August 29, 2000