title: Pujiang-1
text: # Pujiang-1
  
  Pujiang-1, also known as PJ-1, is a Chinese technology demonstration satellite designed to promote the construction of smart cities in China. PJ-1 also monitors weather, traffic and population density of a city. It is the first Chinese satellite that uses 3D printing for the titanium structure of its antenna. It also features a Wi-Fi router providing a communication network between satellites.
  
  ## Launch
  
  PJ-1 was launched on 25 September 2015 at 1:41 UTC from the Jiuquan Satellite Launch Center (JSLC) in China.
  
  ## Orbit
  
  The launch rocket Chang Zheng 11 (Long March 11) delivered PJ-1 satellite into a Sun-synchronous orbit (SSO) at an altitude of about 299 miles (481 km), inclined 97.3 degrees.
  
  