Description:

• On Dec 22, 2015 SpaceX launched their first Falcon 9 since the CRS-7 failure.
  Core F9-021 was also the first 'full thrust' Falcon 9 with improved performance.
• The primary payload was a cluster of Orbcomm OG2 comm satellites. The 11 OG2s and one non-separating mass simulator were mounted on the circumference of a dispenser consisting of three ESPA rings attached to the second stage. After the satellites were deployed, the second stage was deorbited.
• The first stage shut down at an altitude of around 80 km and a velocity of 1.65 km/s (Earth-relative), just before stages 1 and 2 separated.
  The stage reached an apogee of around 200 km before beginning a boostback burn to kill its eastward velocity and send it back towards Florida.
  Following a third, reentry, burn the stage landed back at Cape Canaveral's Landing Zone 1 (former pad 13). The fully controlled vertical landing came at 0139 UTC Dec 22, 2015.