MAGION 5 - Technical Data

Name                                    INTERBALL subsatellite S2-A
 	-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		36W
Character. of the chemical battery	12 Volts/ 4 Ahours
Orbit correction unit			Gas-jet correction engine
Total momentum				300N 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
List of housekeeping systems

Solar battery SB1-8:   	14+4 parallel connected panels, 196x196 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
Primary MPA,B and MPC:         	performs 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 1΅V (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 ΅P 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 ΅P, 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*105Pa
	balloon volume			1.85 liters

Attitude determination system
Infrared Earth’s sen. HSU,D:	a thermistor bolometer is used as a detec-
	tor of IR radiation of the Earth
	operating range		-60°C to +40°C
Solar sensor NASS:		narrow-angle solar sensor for Sun vector determina-
				tion, FOV: ±9°
Solar sensors WASS1, 2:		wide-angle solar sensors for Sun vector determina-
				tion, 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

List of scientific measurements

Magnetometer SG-R8:	a triaxial flux-gate magnetometer with automatic
	switching of sensitivity.
	Range (nT)	±65536	Resolution (nT)	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:	is 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) ana-
	log 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 proc-
	essing 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 an-
	gular 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