The IMMT – the ISS Mission Management Team (IMMT), the coordinating body comprising all ISS partner agencies (ESA, NASA, JAXA, CSA, Roscosmos/RSC-E) – has given the ‘go’ for ATV-4 undocking, set for Monday 28 October. This marks the start of a series of steps that will prep the ESA cargo vessel for departure followed by a controlled destructive re-entry on 2 November. Egress and final hatch closure are set for Friday, 25 October, at 16:00 CEST.

ESA astronaut Luca Parmitano explains ATV while speaking to students at universities in Italy, Germany and Israel during an in-flight call 24 October 2013. Credit: ESA/NASA

ESA astronaut Luca Parmitano explains ATV while speaking to students at universities in Italy, Germany and Israel during an in-flight call 24 October 2013. Credit: ESA/NASA

Note as always: All dates/timings below are forecast only and are subject to change as this is a continuing, dynamic mission. Time below indicated in UTC.

GENERAL STATUS

  • ATV and ATV-CC nominal
  • All cargo delivered and trash loaded
  • Successful last reboost
  • IMMT GO for undocking
  • Green for final EGRESS and ATV preparation before hatch closure and undocking
  • ATV STATUS
  • Attached dormant mode
  • Cabin fan switched Off

ATV-CC STATUS and ATV GROUND SEGMENT

  • All ATV-CC systems nominal
  • ATV monitoring and routine attached activities

CARGO and FUEL STATUS

  • Dry cargo : 2 489kg /100% transferred
  • Accepted trash : 1657kg
  • Accepted liquid waste : 503 l
  • Water : 564kg /100% transferred
  • Air (2 tanks) : 66kg  /100% transferred
  • Oxygen (1 tank): 33.3kg/100% transferred
  • Refuelling propellant : 860kg/100% transferred

EXECUTED OPERATIONS

  • 19 October : PCE test between ISS-ESOC Ground Station
  • 21 October: Last liquid waste transfer
  • 22 October: Orbital D1 unberthing (no ATV support)
  • 22 October : Close-out imagery
  • 23 October : 3rd refuelling vacuuming
  • 24 October: Reboost #6 (0,62m/s, used 86kg)
  • 24 October : ATV equipment gathering,  removal of ATV items to be kept in ISS

NEXT OPERATIONS. MAIN ACTIVITIES

Preparation for undocking/reentry

  • 25 October : Hatches closure (ATV at 14:00 UTC)
  • 25 October : Crew OBT training before undocking
  • 28 October: ATV4 undocking (separation 08:59 UTC)
  • 28 October : ATV in freeflight. Phasing TPO manoeuvres
  • 31 October : MC manoeuvers
  • 01 November : TIV manoeuvers
  • 02 November : Reentry