The Badr-B (Urdu: بدر-۲; also known as Badr-II, meaning Full Moon-2) is the second spacecraft and the first earth observation satellite launched into Earth orbit on 10 December 2001 at 09:15 by the SUPARCO — Pakistan's national space agency. Badr-B is a microsatellite, with a mass of ~70 kg, and contained the computerized system to conduct the studies on the gravity gradient. Badr-B is a research satellite to explore the upper atmosphere and the near space, and carried a large array of instruments for geophysical research.