AKATSUKI returns to Venus
AKATSUKI returns to Venus
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DOI：
10.1186/s40623-016-0457-6
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发表时间：
2016-05-06
影响因子：
3
通讯作者：
Kamata, Yukio
中科院分区：
文献类型：
--
作者：
Nakamura, Masato;Imamura, Takeshi;Kamata, Yukio
Akatsuki是日本的金星气候轨道器，旨在调查金星的气候系统。该轨道器于2010年5月21日发射，并于2010年12月7日抵达金星。轨道机动引擎施加了推力，试图将Akatsuki送入金星向西的赤道轨道，轨道周期为30小时。然而，由于推进系统出现故障，这一操作失败。在这次失败后，航天器围绕太阳运行了5年。2015年12月7日，Akatsuki再次接近金星，金星轨道插入成功，由此启动了一条接近极点44万公里、轨道周期为14天的西向赤道轨道。现在Akatsuki前往金星的漫长旅程已经结束，它将提供两年或更长时间内金星气候系统的科学数据。为了降低极点高度和避免在轨道过程中出现长时间的日食，在第一个极点进行了一次微调动作。极顶高度约为36万公里，极顶高度为1000-8000公里，周期为10天12小时。本文描述了金星轨道插入复仇1号(VOI-R1)和新轨道的详细情况，在该轨道上预期获得的科学信息，以及在VOI-R1成功发射后2小时由机载1微米红外相机、紫外线成像仪和长波红外相机拍摄的金星图像。
AKATSUKI is the Japanese Venus Climate Orbiter that was designed to investigate the climate system of Venus. The orbiter was launched on May 21, 2010, and it reached Venus on December 7, 2010. Thrust was applied by the orbital maneuver engine in an attempt to put AKATSUKI into a westward equatorial orbit around Venus with a 30-h orbital period. However, this operation failed because of a malfunction in the propulsion system. After this failure, the spacecraft orbited the Sun for 5 years. On December 7, 2015, AKATSUKI once again approached Venus and the Venus orbit insertion was successful, whereby a westward equatorial orbit with apoapsis of similar to 440,000 km and orbital period of 14 days was initiated. Now that AKATSUKI's long journey to Venus has ended, it will provide scientific data on the Venusian climate system for two or more years. For the purpose of both decreasing the apoapsis altitude and avoiding a long eclipse during the orbit, a trim maneuver was performed at the first periapsis. The apoapsis altitude is now similar to 360,000 km with a periapsis altitude of 1000-8000 km, and the period is 10 days and 12 h. In this paper, we describe the details of the Venus orbit insertion-revenge 1 (VOI-R1) and the new orbit, the expected scientific information to be obtained at this orbit, and the Venus images captured by the onboard 1-mu m infrared camera, ultraviolet imager, and long-wave infrared camera 2 h after the successful initiation of the VOI-R1.