Astronauts Prepare for Japanese Cargo Ship Departure

Flight Engineer Serena Auñón-Chancellor of NASA monitors the arrival of the H-II Transfer Vehicle-7
Flight Engineer Serena Auñón-Chancellor of NASA monitors the arrival of the H-II Transfer Vehicle-7 (HTV-7) before it was captured during Expedition 56 by Commander Drew Feustel operating the Canadarm2 robotic arm.

A pair of Expedition 57 astronauts trained for the release of a Japanese resupply ship Wednesday after a 41-day mission at the International Space Station. Japan’s seventh cargo ship, H-II Transfer Vehicle-7 (HTV-7), has one more mission though after it departs the orbital lab.

If all goes as planned, astronaut Alexander Gerst of ESA (European Space Agency) will command the Canadarm2 robotic arm to release the HTV-7, also called the Kounotori, Wednesday at 11:50 a.m. EST. Flight Engineer Serena Auñón-Chancellor will back up Gerst in the cupola monitoring the vehicle and its telemetry as it slowly backs away from the space station. The two astronauts reviewed departure procedures and practiced robotics controls on a computer today. NASA TV will broadcast live the space freighter’s departure beginning at 11:30 a.m.

Kounotori was captured Sept. 27 and delivered external station batteries and hardware to be configured during a pair of upcoming spacewalks. The resupply ship also replenished the station with advanced science experiments and equipment to benefit humans on Earth and in space.

However, it has one more payload to deliver for splashdown on Earth before the vehicle burns up harmlessly over the Pacific Ocean. The HTV-7 will release a small reentry capsule packed with test cargo for retrieval by the Japan Aerospace Exploration Agency (JAXA). The splashdown mission is a test of JAXA’s ability to return small payloads from space for quick delivery to researchers on Earth.

Cosmonaut Sergey Prokopyev worked on science and maintenance tasks throughout Monday in the orbital lab’s Russian segment. He started out researching how the space environment and solar radiation affects plasma-dust crystals. Prokopyev finished up his day photographing the condition of the Zvezda service module interior panels before disposing of obsolete hardware in the Progress 70 resupply ship.

One thought on “Astronauts Prepare for Japanese Cargo Ship Departure”

  1. Howdy ISS,

    The video of showing the previous Soyuz rocket mission may clarify exactly the reason why the previous mission of Soyuz rocket been failed, in the video shows that at the second of the booster engines separation the rocket loosed the balance and became spinning upon the vertical axis, this is simply means that one of the booster engines failed to be separate in the suitable time while it has still PROPULSION PRESSURE, if any booster engine delays 0.01 of the second of the separation time of rest of the booster engines it is sufficient to distort the balance of the flight, because its propulsion pressure will create undesired momentum in undesired direction at undesired time, in order to prevent such this episode again: all booster engines should be SHUTDOWN completely together at the same time (second) and stops generating any propulsion pressure, before the separation procedure of the booster engines from the main Rocket, to prevent any side effects, if any of booster engine been delayed the separation procedure of the rest of booster engines for any reason.


    Soyuz rocket have four the booster engines been installed around the end of the rocket, each booster engine installed in angle nearly 175 degree to the vertical axis of the main Rocket body ( not 180 degree ), therefore the propulsion pressure for each booster engine analyzlsing to two Direction force the vertical Force and the horizontal Force

    The vertical force which push Rocket forward.

    180 degrees-175 degrees =5 degrees


    cos5 degrees = 0.99619469809

    sin5 degrees = 0.08715574274

    Fv = propulsion pressure×cos5 degrees


    The horizontal force which may increase the stablizing the Rocket when the four booster engines are in run.

    Fh =propulsion pressure×sin5

    While the four booster engines work together the horizontal force of each two Opposite booster engines cancel the other because they are in Opposite Direction.

    During the separation of the booster engines if any one of these booster engines delayed of the rest of the booster engines the horizontal force = Fh = propulsion pressure×sin5 of that delayed booster engine will be active to spin the main Rocket vertically due to the absence of the opposite side of the horizontal force = Fh = propulsion pressure×sin5 the separated booster engines.

    Please don’t be hesitate to ask any frequently questions for more clarifications.

    Good Luck.

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