Shenzhou 3 launched on March 25, 2002, was the third unmanned launch of China's Shenzhou spacecraft. This was the first Shenzhou spacecraft launched that could have actually carried a human and as such the main objective of the mission was to test the systems required to support a human in space. On board it carried a dummy to simulate physiological signals of a human — palpitation, pulse, breathing, eating, metabolism, and excretion. The launch had been delayed several months due to design changes. It had been planned that Shenzhou 3 would use a new interior design but implementation problems meant reverting to the previous version. The rocket and spacecraft were eventually rolled out on the pad during the Fifth Session of the Ninth National People's Congress and the Ninth National Committee of the Chinese People's Political Consultative Conference in early March 2002.
Orbit
It is thought that Shenzhou 3 changed its orbit twice during the mission. The first was on March 29 at 10:15 UTC when the aft maneuvering thrusters fired for about 8 seconds putting it into a 330.2 km x 337.2 km orbit. The second was on March 31. Both times were to raise its orbit. Shenzhou 3 operated in a slightly less inclined orbit of 42.40° to the previous Shenzhou 1 and 2 flights, which were in about 42.59° inclined orbits.
Shenzhou 3 reentered and landed successfully after 107 orbits. Unlike Shenzhou 2 where no photos had been released of the landing capsule, this time photos were released confirmed a successful touchdown. As with Shenzhou 2 the Orbital Module stayed in orbit for an extended mission. During this time it made some orbital adjustments, raising its orbit. Although it was speculated that it could serve as a docking target for Shenzhou 4, this did not turn out to be the case. Its mission ended in October 2002 and it reentered on November 12 at about 06:38 UTC over 22°S 109° E over the Indian Ocean off western Australia.
Shenzhou 3 was the first Long March 2F launch to feature a working launch escape system. Also added were two manual system that would have allowed an astronaut to activate the system in case of emergency. It was tested during the launch phase though Chinese officials did not confirm if the test was successful. A day after launch China Central Television broadcast an artist impression of the spacecraft in orbit. Of interest was that the front of the orbital module appeared to have been equipped with three seven element log-periodic antennae. It is thought that it was designed for a frequency range of 300–1000 MHz. Also shown was an animation of the orbital module after it had separated from the rest of the spacecraft. Three booms were extended from the front package, one left, another right and the third forward. It is speculated that this could have been some sort of ELINT package.
