Xingyun-2 01 & 02 (XY-2 01/02)

Launch data: Designation  Xingyun-2 01 (Wuhan)  Xingyun-2 02 NORAD-ID  45602  45603 Int. code  20028A  20028B Launch date  12 May 2020 - 01:16 UTC Launch site  Jiuquan, SLS-E2 Launch vehicle  Kuaizhou-1A Mission  Communication Sun-synch Earth orbit: Perigee / Apogee  557x573 km  557x573 km Eccentricity     Inclination  97.6°   97.6° Period   min   min Decay

Spacecraft data: Prime manufacturer  CASIC Platform   Operator  Sanjiang Hangtian Xingyun Keji YG Mass at launch  93 kg Dry Mass   kg Basic shape   Dimension (m)   Equipment  L-band communication payload, inter-satellite laser communication package Solar array  2 deployable solar arrays Stabilization   Propulsion   DC power   Design lifetime

Mission details:

• A Chinese Kuaizhou-1A (Y6) rocket has launched the first two operational satellites for the Xingyun narrowband constellation. The launch took place at 01:16 UTC on Tuesday from the Jiuquan Satellite Launch Center. The two satellites Xingyun-2 (01) ‘Wuhan’ and Xingyun-2 (02) were developed by the Xingyun Satellite Co., a subsidiary of China Aerospace Science and Industry Corporation (CASIC), Sanjiang Group, in Wuhan.
• The first satellite of the Xingyun project was named “Wuhan”, which was intended to “pay tribute to the heroic Wuhan city and the heroic Wuhan people”, according to Chinese state media.
• Each satellite has a launch mass of 93 kg and its main payload is an L-band communication system and a trans-satellite laser communication package. There are believed to be other, unspecified, hosted payloads onboard.
• KZ-1A S/N Y6 placed two Xingyun-2 satellites in 560 km sun-synch orbit after two burns of the fourth stage. A further fourth stage burn left the stage in a low-perigee 162 x 958 km orbit.
• The narrow-band data transfer rate is 2.4 – 9.6 kbps for uplink and 2.4 kbps for downlink. The satellites will operate at a 561 km altitude SSO.
• The usual launch profile involves first stage separation taking place 1 minute and 23 seconds after launch. The second stage separation takes place at 2 minutes 21 seconds after launch, and the fairing jettisoning 15 seconds after second stage separation.
• Ignition of the third stage occurs at 192 seconds into the flight, ending 1 minute 32 seconds later. Three seconds after third stage separation, the fourth and final stage provides the last kick into orbit, with a burn duration of 12 minutes and 45 seconds. Spacecraft separation takes place 17 minutes and 40 seconds after launch.
  
  
  
• The first satellite separates 25 minutes 55 seconds into the flight and the second satellite separates 2 minutes 30 seconds later.

External links:

• Satellite tracking: Real time satellite tracking