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H-II Transfer Vehicle KOUNOTORI (HTV)

Last updated:August 14, 2015

HTV5 Mission Timeline

Flight Day Major mission events
  • Launch, Orbit Insertion
  • Post-insertion auto sequence
    • HTV subsystem activations
    • Attitude control
    • System check
    • Establishment of communication with the Tracking and Data Relay Satellite (TDRS)
    • Initiation of communication with the HTV Mission Control Room (HTV MCR) at the Tsukuba Space Center
  • Rendezvous Maneuver
FD1 to FD5
  • Far-field Rendezvous Maneuvers
  • Proximity Operations, Final Approach
  • Capture by the Space Station Remote Manipulator System (SSRMS)
  • Berthing to ISS
    • Berthing to the Harmony's Nadir Port
    • Vestibule outfitting
    • Activation of HTV power supply from ISS
    • Switching of the communications line (Radio wave to fixed line)
Transfer of  the 

  • Removal of the Exposed Pallet (EP) from the HTV Unpressurized Logistics Carrier (ULC) and the transfer to the Kibo's Exposed Facility (EF)
  • Crew ingress to the Pressurized Logistics Carrier (PLC)
    • Removal of the Controller Panel Assemblies (CPAs)
    • Hatch open
    • Activation of the Inter-Module Ventilation (IMV)
    • Transfer of the Portable Breathing Apparatus (PBA) and the Portable Fire Extinguisher (PFE) in the PLC
cargo transfer
  • Cargo Transfer From PLC to ISS
  • Installation of the Japanese exposed experiment device that is placed onto EP to the Kibo's EF using the JEMRMS
Exposed Pallet
  • Removal and transfer of exposed experiment devices using the JEMRMS to the EP for disposal
Exposed Pallet
  • Reinstallation of the empty EP back into the HTV's ULC
Cargo transfer
  • Cargo transfer / Trash loading
A day before
from the ISS

  • Preparation for the HTV Unberthing Operations
    • Removal of lights, PFEs, and PBAs (all to be stowed on ISS)
    • Installation of CPA on the CBM
    • IMV de-activation
    • Hatch closure
    • Switching of the communications line (Radio wave to fixed line)
Unberthing Day
  • KOUNOTORI5 unberthing
    • Deactivation of HTV power supply from ISS
    • Vestibule de-outfitting
    • KOUNOTORI5 grapple by the SSRMS
    • CBM bolts release
    • SSRMS moves KOUNOTORI5 to release position
    • Activation of the Guidance Navigation Control (GNC), activation of HTV propulsion system
    • SSRMS ungrapples KOUNOTORI5
    • KOUNOTORI5 begins separation maneuvers
  • De-orbit Maneuver
  • Fiery Reentry

* In-flight schedule of the HTV4 mission is subject to change depending on the ISS's operations timeline.
* Pictures used in the table are taken during the previous HTV missions. Some of them are Computer Graphics (CG) images.

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