In February 2005, the first Indian radio amateur microsatellite is being prepared to be launched by the PSLV (Polar Satellite Launch Vehicle) from Sriharikota.
Tento satellite bude približne kubického tvaru (630 x 630 x 550 mm) a bude vážiť 40 kilogramov. Na štyroch stenách sú solárne panely, na vrchu sú antény a spodná časť slúži na pripevnenie k raketoplánu.
Satellite orbit
An elliptical orbit with a height of around 817 km above the earth's surface is assumed. One flyby will take approximately 116 minutes, and under ideal conditions it will be within range of the ground station for ten to twelve minutes.
There are two linear transponders on board: Indian and Dutch. Both are designed to work in B mode with uplink on UHF and downlink on VHF (U – V operation). Their bandwidth is 60 kHz and thus enable CW, SSB and FM communication. The output power is approximately 30 dBm (1W).
Earth station equipment requirements
The requirements for the equipment of the earth station are quite high. For example, for work you will need:
1, UHF uplink (435.250 MHz)
- RF power: 40 dBm (10W)
- Antenna gain: 12 to 18 dBi
- EIRP at max. antenna gain: 56 dBm
2, VHF downlink (145.900 MHz)
- Antenna gain: 16 dBi
- Carrier frequency level at RX input: -107 dBm (1uV)
The transponders will be distinguishable by beacons, the VU part will transmit an unmodulated carrier on 145.940 MHz, the PA part will transmit a modulated signal on 145.860 MHz.