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.

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 weight	31 kg	80 kg
Carrier rocket	"Kosmos-3M"	"Shtil'"
Launch type	passing ground	main submarine
Parameters of the orbit
altitude	1000 km	400-620 km
inclination	83њ	79њ
Active life period	> 1 year	1-2 years
Orientation accuracy	+ (1.0њ - 3.0њ)	+ (1.0њ - 3.0њ)
Power supply
average daily power	7 W	25 W
voltage	12 - 18 V	18-36 V

Table 2. The main characteristics of the equipment.

	"Universitetskiy"	"Kompas-2"
Weight	7.2 kg	20 kg
Power consumption	≤ 4.6 W	≤ 3 W
Information traffic	≥ 100 kbites/day	~ 2 Mbites/day

Scientific equipment of the satellites

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.