Design
The technical director of Badr-I was dr. Salim Mehmud, Director of Suparco. The satellite was slightly bigger than Soviet Sputnik 1 satellite in size. The Badr-1 was an indigenously built and developed satellite of Pakistan. The major contractor was Instrumentation Laboratories and the Pakistan Amateur Radio Society, supported by Ministry of Science and the Ministry of Telecommunications. The satellite shaped as a polyhedron with 26 surfaces or facets, was about 20 inches in diameter. The polyhedrons, covered with highly polished heat shield, made of aluminium-magnesium-titanium. The satellite carried two antennas designed by Instrumentation Laboratories. The power supply, with a mass of 52 kg. The satellite was powered with solar power panels with a 12.5 W electricity. The satellite was designed in SUPARCO Satellite Control Center at Lahore. The satellite had one radio channel for digital store-and-forward communications.
A transponder uplink was near 435MHz, and the downlink was near 145 MHz. The telemetry beacon was near 145 MHz. Data from 32 telemetry channels, including information from 9 temperature sensors, 16 current sensors, and 5 voltage sensors, was stored in an 8k memory bank and transmitted at 1200, 600, 300 and 150 baud. Originally designed for a circular orbit at 250–300 miles altitude, Badr-1 actually was inserted by the Long March rocket into an elliptical orbit of 127–615 miles. The cost of development and preparation of satellite was no more than Rs. 1.2 million.
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