Japanese H-2A lofts IGS (Radar-3) satellite into orbit

Japan has launched a new Information Gathering Satellite (IGS) known as Radar-3, via their H-2A (H-IIA) launch vehicle. Amateur footage of the launch provided confirmation of a successful lift off from the Yoshinobu Launch Complex at the Tanegashima Space Center (TNSC) at 01:21 UTC in the early hours of Monday. Spacecraft Separation was confirmed via official sources shortly afterwards.

Japanese Launch:

The launch vehicle (F-20) used was the 202 version of the H-2A rocket equipped with two solid rocket boosters and likely with the 4S fairing design (4 meters in diameter). Mitsubishi Heavy Industries, Ltd. is charged as the launch service provider for the H-IIA.

The H-2A can be launched in various configurations by installing additional solid rocket boosters. Its first stage has a length of 37.2 meters, a diameter of 4 meters and a mass of 114 tons. The stage burns a mixture of liquid oxygen and liquid hydrogen, developing a liftoff thrust of 1,098 kN. Its burning time is of 390 seconds.

The H-IIA/202 is equipped with two solid rocket boosters. Each SRB-A has a length of 15.1 meters, a diameter of 2.5 meters and a mass of 77 tons. This solid boosters burn a mixture of polybutadiene composite solid propellant, developing a liftoff thrust of 2,245 kN each unit. The SRB-A operate for 60 seconds.

The second stage has a length of 9.2 meters, a diameter of 4 meters and a mass of 20 tons. The stage burns a mixture of liquid oxygen and liquid hydrogen, developing a liftoff thrust of 137 kN. Its burning time is of 530 seconds.

The H-2A is capable of launching a cargo of 2,000 kg to a Geosynchronous Transfer Orbit (GTO), 10,000 kg to a Low earth Orbit with a Inclination of 30 degrees, 4.000 kg to a Sun Synchronous Orbit or 2,500 kg to a planetary mission.

The Information Gathering Satellite (IGS) is a military spy satellite system, which was designed as a response to North Korea’s 1998 missile test over Japan.

Its primary mission is to provide early warning of impending hostile launches. During their mission, the pairing of satellites allowed them to fly on a 492 km orbit at a separation distance of 37 minutes, as they made passes over the North Korean capital each day.

However, this opening duo of satellites in this IGS range – the 1A and 1B  – were incapacitated four years after their March 28, 2003 launch – also via a H-IIA vehicle – as one of the pair lost its radar ability. 1B is expected to suffer from an uncontrolled re-entry in 2012 or 2013.

They had expected to be joined by a second pair of IGS satellites – 2A and 2B. However, they were both lost via the H-IIA launch failure of November, 2003.

Should Radar-3 enjoy a successful orbital checkout phase, the lost capability will return for Japan’s IGS system.

A second optical surveillance satellite – IGS 3A – was launched on 11 September 2006. A third optical satellite – IGS 4A – and a second radar satellite – IGS 4B – were then launched on 24 February 2007. IGS 4A is classed as a advanced and experimental optical satellite.

ISG 4B has since been incapacitated, due to an inability to carry out its monitoring functions.

A fourth optical satellite – IGS 5A – was launched on 28 November 2009, advancing the resolution ability when compared to the previous satellites.

The latest IGS satellite to launch prior to Radar-3 was Optical 4, which was also lofted uphill via the H-2A (H-IIA) launch vehicle from the Yoshinobu Launch Complex at the Tanegashima Space Center (TNSC).

(Launch image via webcast provided by @kimi_lica - see live coverage link for additional. Image within the article via yomiui.co.jp).

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