A Japanese HTV cargo wagon is ready for its launch. The liftoff is on Tuesday according to U.S. time. It aboard a Sony-developed laser communications terminal, a powerful H-2B rocket, transporting six new lithium-ion batteries, some other equipment, and freshwater to the International Space Station. This freighter is unpiloted, set for its launch from the Tanegashima Space Center, at 2133:29 GMT. The spaceport is largest rocket-launch complex in Japan. Carved from rocky outcrops, located on the southeast coast of Tanegashima, it is overlooking the Pacific Ocean. HTV supply ship also called Kounotori 8. A Mitsubishi Heavy Industries, powerful H-2B rocket will drag Kounotori 8 into the orbit, heading southeast of the pacific on a 15-minute flight. Launch time is set for 6:33 a.m., according to Japan Standard Time on Wednesday. It is approximately the time when the earth’s rotation will bring Tanegashima launch complex under the international space station’s orbital plane.
H-2B rocket is around 186-foot-tall i.e., 56.6-meter. It is set to roll out Tuesday from Launch Pad No. 2 situated at Tanegashima. The launch crew will connect the freighter’s mobile transporter to ground electrical and fluid supplies. Liquid Oxygen and Super-Cold Liquid Hydrogen will be powering both the stages of the launcher and will be flowing into the rocket around an hour before the launch. The rockets main engine, stage LE-7A, will ignite during the final seconds of the countdown. After this four strap-on rocket boosters will ignite and generates around 2.5 million pounds of propulsion, to push the launcher off the pad. Then the rocket’s guidance computer will direct the rocket to the southeast so that it aligns with the orbital plane of ISS. After this stage, four strap-on boosters will burn out completely and unload around two minutes after launch. At this stage, the rocket’s payload fairing, which will be shielding the HTV supply ship, will be separated at approximately T plus 3 minutes and 40 seconds.
The crew of six-persons present inside the space station will be unpacking 5,313 pounds of cargo present inside the ships’ pressurized logistics carrier. In the meantime, robots present out of the station will extract a pallet from the Kounotori’s unpressurized cargo bay. Unpressurized cargo bay consists of 6 li-ion batteries to enhance the ISS’s power system.