EDUSAT SATELLITE PDF

It is mainly intended to meet the demand for an interactive satellite-based distance education system for the country. EDUSAT carries five K u band transponders providing spot beams, one K u band transponder providing a national beam and six extended C band transponders providing national coverage beams. About seventeen minutes after lift off, the satellite was successfully placed in GTO. At count zero and after confirming the normal performance of all the four strap-on motors, the tonne solid propellant first stage core motor was ignited and GSLV blazed into the sky.

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The primary goal of the program is to promote space education among high school students and to support the qualification and scientific careers of young people, as university students and young researchers. Another target of this program is to develop a small space mission for low cost scientific experiments and technological tests in orbit.

The program involves courses and post-doc positions at several national universities. The students are also involved in the development of a small payload sun sensor which will be hosted on board EduSat.

The structure is modular and fast to assemble and disassemble, thus permitting a good flexibility even in substituting a complete section whenever it is needed and giving to the students the possibility to work, at the same time, on different subsystems.

The solar arrays are surface-mounted and the photovoltaic system is based upon triple junction solar cells GaAs which are glued to a non-conductive support. NiCd batteries are being used for energy storage. The spacecraft attitude subsystem is based upon passive magnetic stabilization providing a restoring torque to align one of the satellite axis with the local direction of the geomagnetic field. This attitude system exploits a permanent magnet which produces the restoring torque and hysteresis rods for oscillation damping.

The data rates are 9. In addition, a back-up S-band channel may be used with a downlink rates of The launch provider is ISC Kosmotras. The secondary payloads on this flight are:. The BPA-2 experimental payload remained attached to the upper stage of the Dnepr-1 launch vehicle.

The orbit is slightly lower than the one of the DMC constellation. Hence, only a listing of the experiments can be given at the time except for the sun sensor.

The documentation will be completed when available. The sun sensor payload was designed and developed by high school students of several high schools in Italy. The EduSat team selected an analog sun sensor design capable of detecting the attitude of the satellite with respect to the sun. It is comprised of four solar cells monocrystalline silicon, Figure 7 , closed on a resistive load. The output voltages of the cells vary with the density of the solar radiation, and can be used to set the different attitude angles of the satellite with respect to the sun.

The four solar cells are mounted on the four sides of a metallic frustum of a pyramid Figure 8. An electronic circuit, detects the voltage level at the terminal of each resistor, and provides two analog outputs V range. Furthermore, a cylindrical shield protects the sun sensor from solar radiation coming from undesirable directions.

The system, which is based on a new concept, is using a passive system for the deployment of the sail allowing more reliability the system works even when the satellite is defunct. Graziani, F. Santoni, F. Piergentili, M. Battagliere, F. Paolillo, G. Pulcrano, G. The information compiled and edited in this article was provided by Herbert J. Figure 7 : Sketch of of each solar cell mounted onto the sun sensor image credit: GAUSS The four solar cells are mounted on the four sides of a metallic frustum of a pyramid Figure 8.

OSHO GEETA DARSHAN PDF

India launches world's first education satellite

The satellite was built and is operated by the Sapienza University of Rome in conjunction with the Italian Space Agency ASI, and is primarily used for educational outreach and technology demonstration. It carries an experimental analogue sun sensor, a magnetometer and a temperature sensor. The satellite also tested a prototype PocketQube deployer and a passive deorbit mechanism. As of September it remained operational. The launch was conducted by Kosmotras with liftoff occurring at on 17 August The rocket carried six other satellites, with an additional payload bolted to the upper stage.

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GSat 3 (EduSat)

The primary goal of the program is to promote space education among high school students and to support the qualification and scientific careers of young people, as university students and young researchers. Another target of this program is to develop a small space mission for low cost scientific experiments and technological tests in orbit. The program involves courses and post-doc positions at several national universities. The students are also involved in the development of a small payload sun sensor which will be hosted on board EduSat.

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