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Space Scientific and Education project of Lomonosov Moscow State University "MSU-250" - supersmall satellites

Supersmall satellites "Universitetskiy" and "Kompas-2"

Structure of the supersmall satellites
Scientific equipment

Structure of the supersmall satellites

Supersmall satellite "Universitetskiy" is manufactured by Production Corporation "Polyot" (Omsk, Russia) in the interests of Lomonosov Moscow State University.

Конструкция микроспутника "Университетский"

Supersmall satellite "Kompas-2" is a pilot project of multi-satellite system which is intended for prediction and motnitoring of natural and technologenical disasters. This system is developed in terms of the Russian Federal space program for 2001-2005 confirmed by Rosaviakosmos. The Federal space agency is the customer of the project, the R&D electromechanical Institute is the head subdivision, Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN) and the Makeev state rocket center are contractors of the project.

Table 1. The main characteristics of the satellites.
 "Universitetskiy" "Kompas-2"
Total weight31 kg 80 kg
Carrier rocket"Kosmos-3M" "Shtil'"
Launch typepassing
ground
main
submarine
Parameters of the orbit   
    altitude1000 km 400-620 km
    inclination83њ 79њ
Active life period> 1 year 1-2 years
Orientation accuracy+ (1.0њ - 3.0њ) + (1.0њ - 3.0њ)
Power supply    
    average daily power7 W 25 W
    voltage12 - 18 V 18-36 V

Table 2. The main characteristics of the equipment.
 "Universitetskiy" "Kompas-2"
Weight7.2 kg20 kg
Power consumption≤ 4.6 W≤ 3 W
Information traffic≥ 100 kbites/day ~ 2 Mbites/day

Scientific equipment of the satellites

payload of te satellites "Universitetskiy" and "Kompas-2" include the groups of detectors for the charged particles flux measurements (BD1-BD4 and BA of the "Universitetskiy" satellite and BD1-BD3 of the "Kompas-2"); detectors registering UV-emission within te range of 300-400 nm wavelength (DUV); inforamtion units, which record and transmit the scientific information from the detecting units to the auxiliary units, which in turn transmit it to the ground-based receiving stations (BI).

Table 3.1. Composition of the scientific equipment of the "Universitetskiy" satellite.
Group of detectors Type of detectors Covered by Energy
of the detected particles
Geometric factor, G sm2sr
BD1 SBT-9 10 mkm Al Ее > 40 keV
Ep > 1 MeV
4·10-4
BD1 SBM-20 1 mm Al +
3 mm Pb
Ee > 5 MeV
Ep > 40 MeV
54
BD2 Semiconductor detector
 
300 mkm Si
(single)
10 mkm Al Ee > 70 keV
Ep > 0.8 MeV
 
Ep = 2.2-14 MeV
 
Ep = 1-100 MeV
9.7·10-2
BD3 Semiconductor detector
 
300 mkm Si
300 mkm Al Ee = 0.3-0.6 MeV
Ep > 7 MeV
 
Ep = 7-15 MeV
9.7·10-2
BD3 Semiconductor detector
 
1000 mkm Si
~ 1 mm Al Ee = 0.6-0.8 MeV
Eе > 7 MeV
 
Ep = 15-40 MeV
2·10-2
BD4 Scintillation detector
 
CsJ(Tl)
15×20 mm
~ 2 mm Al Ee > 3.5 MeV
Ep > 20 MeV
 
Ee > 11 MeV
Ep > 23 MeV
 
Ep = 40-100 MeV
25
BD4 Scintillation detector
 
CsJ(Tl)
15×20 mm
~ 7 mm Al +
3 mm Pb
Ee > 18 MeV
Ep > 60 MeV
 
Eα > 240 MeV
25
BA     Ee ~ 1 keV 3·10-5 sm2·sr·keV
DUV Photoelectronic multiplier protected against charged particles   UV
λ = 300-400 nm
opening 15°
 

Table 3.2. Composition of the scientific equipment of the "Kompas-2" satellite.
Group of detectors Type of detectors Covered by Energy
of the detected particles
Geometric factor, G sm2sr
BD1 Semiconductor detector
 
300 mkm Si
300 mkm Al Ee = 300-600 keV
Ep = 7-16 MeV
5·10-2 - 10-1
BD1 Semiconductor detector
 
1000 mkm Si
1 mm Al Ee = 700-900 keV
Ee > 900 keV
 
Ep = 14-60 MeV
5·10-2 - 10-1
BD4 Scintillation detector
 
CsJ(Tl)
15×20 mm
~ 4 mm Al +
11 mm Pb
Ep > 110 MeV
Eα > 400 MeV
 
Ep = 14-60 MeV
40
BD3 SBT-9 10 mkm Al Ee ≤ 40 keV
Ee ≤ 900 keV
Ep = 14-60 MeV
5·10-3 - 10-2
DUV Photoelectronic multiplier protected against charged particles   UV
λ = 300-400 nm
opening 15°
 

The scientific equipment "Tatiana" described in the Table 3.2 is a part of the measuring complex of the "Kompas-2" satellite, which is developed for the detection and registration of the abnormal physical phenomena resulted from seismic activity, for their operative analysis and selection of the strong earthquakes precursors, and also for the global monitoring of the abnormal seismogenic phenomena and their consequences.

The scientific complex of the "Kompas-2" satellite includes the following equipment produced by Russian, foreign and joint companies: ULF/VLF wave complex, double-frequency transmitter "Mayak", GPS measuring instrument, scientific equipment "Tatiana", radio-frequency analyser.

©Skobeltsyn Institute of Nuclear Physics, 2003 - 2005.