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Launch Result of ASTRO-F/M-V-8 (Forwarded)
Public Affairs Department
Japan Aerospace Exploration Agency (JAXA) Marunouchi Kitaguchi Building, 1-6-5, Marunouchi, Chiyoda-ku, Tokyo 100-8260 Japan TEL:+81-3-6266-6400 February 22, 2006 Launch Result of ASTRO-F/M-V-8 The Japan Aerospace Exploration Agency (JAXA) launched the 21st Scientific Satellite (ASTRO-F) aboard the M-V Launch Vehicle No. 8 (M-V-8) at 6:28 a.m. on February 22, 2006 (Japan Standard Time, JST [2128 UTC February 21]) from the Uchinoura Space Center (USC). The launcher was set to a vertical angle of 81.5 degrees, and the flight azimuth was 143.0 degrees. The launch vehicle flew smoothly, and after the third stage engine burnout, it was confirmed that the satellite was safely injected into its scheduled orbit of a perigee altitude of approximately 304 km and an apogee altitude of approximately 733 km with an inclination of approximately 98.2 degrees. JAXA started receiving signals from the ASTRO-F at 6:43 a.m. at the Perth Station, and from those signals we verified that the ASTRO-F had successfully separated. The in-orbit ASTRO-F was given a nickname of "Akari" (meaning a "light.") We would like to express our appreciation for the cooperation and support from all related personnel and organizations that helped contribute to the successful launch of the ASTRO-F/M-V-8. This information is also available on the following website: ASTRO-F/M-V-8 Countdown http://www.isas.jaxa.jp/e/countdown/index-en.shtml ***** Public Affairs Department Japan Aerospace Exploration Agency (JAXA) Marunouchi Kitaguchi Building, 1-6-5, Marunouchi, Chiyoda-ku, Tokyo 100-8260 Japan TEL:+81-3-6266-6400 February 22, 2006 Solar Array Paddle Deployment of the 21st Scientific Satellite "Akari" The Japan Aerospace Exploration Agency (JAXA) has confirmed the successful deployment of the solar array paddle (PDL) of the 21st Scientific Satellite "Akari" through telemetry data that has been received at the Santiago Station since 8:46 a.m. (Japan Standard Time, JST [2346 UTC February 21]) The "Akari" was launched by the M-V Launch Vehicle No. 8 (M-V-8) at 6:28 a.m. on February 22, 2006 (JST [2128 UTC February 21]) from the Uchinoura Space Center (USC.) This information is also available on the following website: ASTRO-F/M-V-8 Countdown http://www.isas.jaxa.jp/e/countdown/index-en.shtml ***** Public Affairs Department Japan Aerospace Exploration Agency (JAXA) Marunouchi Kitaguchi Building, 1-6-5, Marunouchi, Chiyoda-ku, Tokyo 100-8260 Japan TEL:+81-3-6266-6400 February 22, 2006 Initial Operation of the 21st Scientific Satellite "Akari" (ASTRO-F) The 21st Scientific Satellite "Akari" which was launched by the M-V Launch Vehicle No. 8 from the Uchinoura Space Center at 6:28 a.m. on February 22, 2006 (Japan Standard Time, JST [2128 UTC February 21]), was found to be stable in spite of a slight problem. After its launch, the "Akari" was injected into its scheduled orbit, and the JAXA New Ground Network (GN) Station in Perth, Australia, started receiving data from the satellite at 6:43 a.m. (JST [2143 UTC February 21]) Through the data, it was confirmed that the "Akari" was successfully separated and was in a spin mode. The JAXA GN Station in Santiago, Chile, started receiving data at 8:48 a.m. (JST [2348 UTC February 21]), and the satellite attitude was found to be shifted from the spin mode to spin downed mode as scheduled. The solar array paddle deployment and its power generation were also confirmed. However, the solar pointing of the attitude control was not complete. Based on our investigation, there is an unknown factor in the output of the two-dimensional solar sensor (NSAS). Due to this trouble, the "Akari" has been shifted to the attitude control mode using the earth sensor (CES) and the gyroscope (IRU) to secure the necessary power from the solar array paddles. It was confirmed that the power has been stably generated through the data that was received at the JAXA GN Station in Kiruna, Sweden, since 12:44 p.m. (JST [0344 UTC]) Currently, we are investigating the status of the two-dimensional solar sensor (NSAS). The overall health condition of the "Akari", apart from the two-dimensional solar sensor, is stable, and we do not perceive that any problem will arise for the scheduled observation operations. This information is also available on the following website: ASTRO-F/M-V-8 Countdown http://www.isas.jaxa.jp/e/countdown/index-en.shtml |
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