mardi 27 février 2018

JAXA - Reconnaissance satellite launched by H-2A rocket









JAXA - Japan Aerospace Exploration Agency logo.

February 27, 2018


Image above: A Japanese reconnaissance satellite rode to orbit Tuesday aboard the country's H-IIA carrier rocket. Liftoff, from the Tanegashima Space Centre.

A Japanese H-2A rocket launched Tuesday with a clandestine government-owned satellite to collect sharp-eyed views of North Korea’s missile developments and other global hotspots.

The 174-foot-tall (53-meter) rocket fired its hydrogen-fueled LE-7A main engine and two solid rocket boosters at 0434 GMT Tuesday (11:34 p.m. EST Monday) to fire into space from the Tanegashima Space Center, a launch base carved into a rocky oceanfront outcrop on an island off Japan’s southwestern coast.

Propelled by 1.4 million pounds of thrust, the H-2A rocket climbed through a clear afternoon sky at Tanegashima, where launch occurred at 1:34 p.m. local time Tuesday.

Japanese H-2A Rocket Launches IGS Optical 6 Earth Observation Satellite

The two solid rocket boosters consumed their pre-packed propellants in less than two minutes before falling away to plummet into the Pacific Ocean. The H-2A’s nose shroud jettisoned around four minutes after liftoff, followed by shutdown of the rocket’s first stage engine around six-and-a-half minutes into the flight.

An upper stage LE-5B engine, also burning liquid hydrogen and liquid oxygen, ignited to send Japan’s newest Information Gathering Satellite into an orbit that will take it around Earth over the poles.

The Japan Aerospace Exploration Agency and Mitsubishi Heavy Industries, the H-2A rocket’s main contractor, did not provide a live video webcast of the mission. But news media and other spectators near the launch pad streamed the launch live online, and announcements over loudspeakers at the Tanegashima press site confirmed separation of the IGS Optical 6 satellite in orbit.

IGS Optical 6 Earth Observation Satellite

The spacecraft’s specifications, including its imaging performance, are kept secret by the Japanese government. But the government has acknowledged the satellite will join a fleet of Information Gathering Satellites operated by the Cabinet Satellite Intelligence Center, which reports directly to the Japanese government’s executive leadership.

Tuesday’s mission was the 38th flight of an H-2A rocket, and the 12th time an H-2A launcher has lifted off with an Information Gathering Satellite, a record that includes one launch failure. The H-2A rocket flew in the basic “202” configuration with two strap-on solid rocket boosters. Heavier satellites launching on the H-2A sometimes need four boosters to reach orbit.

For more information about Japan Aerospace Exploration Agency (JAXA): http://global.jaxa.jp/

Images, Video, Text, Credits: JAXA/Spaceflight Now/Stephen Clark/Julian Danzer.

Greetings, Orbiter.ch

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