Chang'e I, China's first lunar orbiter, officially began
exploring the moon yesterday evening, the China National Space
Administration (CNSA) said.
Its sensing equipment was due to become operational after the
orbiter oriented its solar panel toward the sun so it can generate
its own power and swung its directional antenna toward the Earth to
transmit data.
The satellite is equipped with a stereo camera and
interferometer, an imager and gamma/X-ray spectrometer, a laser
altimeter, a microwave detector, a high-energy solar particle
detector and a low-energy ion detector.
The satellite is expected to relay back its first pictures of
the moon before the end of this month.
Chang'e I will not be able to relay back pictures immediately
because scientists will have to take some time tweaking the
equipment, Pang Zhihao, a researcher with the China Academy of
Space Technology, was quoted by the Shanghai-based Oriental Morning
News as saying.
By way of example, he said the aperture of the orbiter's camera
will have to be adjusted to light available in space.
Factors such as the distance between the orbiter and the lunar
surface will also have to be factored into the process, he
said.
Pang said the images taken by Chang'e I will be wider than those
snapped by Japan's lunar probe.
Those pictures were released on November 7.
The best of the images captured by Chang'e I will be released to
the public before the end of this month, he said.
The satellite entered the 127-minute polar circular orbit about
200 km above the moon's surface on November 7.
It had circled the moon 135 times as of 2 pm on Sunday, CNSA
spokesman Pei Zhaoyu said on Sunday.
The orbiter is under direct control for at least 15 hours a day,
monitored by tracking stations in Qingdao, Shandong Province, and
Kashgar, the Xinjiang Uygur Autonomous Region, as well as a station
operated by the European Space Agency.
Since Chang'e I entered its present orbit, it has undergone a
number of tests to determine whether it is working properly.
The satellite appears to be functioning smoothly.
(Xinhua News Agency November 20, 2007)