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H-II Transfer Vehicle KOUNOTORI (HTV)

Last updated: July 26, 2013

KOUNOTORI4 Mission Timeline

In-Flight Schedule

HTV4 Mission Timeline
Flight Day Major mission events
Photo: Launch thumbnail
  • Launch, Orbit Insertion
  • Post-insertion auto sequence
    • HTV subsystem activations
    • Attitude control
    • System check
    • Tracking and Data Relay Satellite (TDRS) communications establishment
    • Initiation of communication with HTV Mission Control Room (HTV MCR) at Tsukuba Space Center
  • Rendezvous Maneuver
FD1 to FD6
Photo: HTV thumbnail
  • Far-field Rendezvous Maneuvers
FD6 to FD7
Photo: Capture thumbnailPhoto: hatch open thumbnail
  • Proximity Operations
  • Final Approach
  • Capture by the Space Station Remote Manipulator System (SSRMS)
  • Berthing to ISS
    • Berth to the Harmony's Nadir Port
    • Vestibule outfitting
    • Activation of HTV power supply from ISS
    • Switching of the communications line
  • Crew ingress to the Pressurized Logistics Carrier (PLC)
    • Removal of the Controller Panel Assemblies (CPAs)
    • HTV PLC 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
After FD8
Photo: PLC thumbnail
  • Cargo Transfer From PLC to ISS
Photo: EP thumbnail
  • Move of the Exposed Pallet (EP) from the HTV Unpressurized Logistics Carrier (ULC) to the Kibo's Exposed Facility (EF)
Image: EP thumbnail
  • Transfer of NASA's payload Space Test Program - Houston 4 (STP-H4) and system hardware from EP
Image: EP thumbnail
  • Transfer of STP-H3 to EP for disposal
Photo: EP thumbnail
  • Reinstallation of EP into ULC
Photo: PLC thumbnail
  • Cargo Transfer from PLC to ISS
  • Trash Loading from ISS to PLC
One Day Before Unberthing
Photo: PLC thumbnail
  • Unberthing Preparation
    • Removal of lights, PFEs, and PBAs (all to be stowed on ISS)
    • installation of CPA on the CBM
    • Deactivation of the IMV
    • Hatch closure
    • Switching of the communications line
Unberthing Day
Photo: HTV release thumbnail
  • KOUNOTORI4 Unberthing, Separation from ISS
    • Deactivation of HTV power supply from ISS
    • Vestibule de-outfitting
    • KOUNOTORI4 grapples by the SSRMS
    • CBM bolts release
    • SSRMS moves KOUNOTORI4 to release position
    • Activation of the Guidance Navigation Control (GNC), activation of HTV propulsion system
    • SSRMS ungrapples KOUNOTORI4
    • KOUNOTORI4 begins separation maneuvers
Reentry Day
Image: HTV reentry
  • 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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