Study on New Methods for Near Infrared High Precision- Astrometry

我们正在计划一项红外空间天体测量任务，对恒星的位置和运动进行高精度观测。这项任务被称为茉莉花。我们的研究目的是利用一个包含整个观测过程的仿真系统，研究茉莉花的观测策略和卫星规格等需要解决的关键问题。该模拟器称为茉莉花模拟器，包含茉莉花卫星仪表和总线系统的真实模型，作为具体的成功成果，我们在茉莉花模拟器中构建了一个集成的仿真系统，其中使用了面向对象的方法学、统一建模语言等新的软件技术。在模拟器中，我们将被模拟的物体分为卫星总线系统、光学系统、探测器(焦平面上)和银河系中的待观测恒星等组件。我们已经完成了一个框架，在该框架中我们可以轻松地管理…通过绘制图形，使部件的属性更多地依赖于部件的其他属性。此外，我们还开发了每个部件，并使用模拟器经常研究观测策略，以及考虑卫星尺寸、卫星成本等因素的仪器规格。因此，我们可以确定基本规格，并与涉及卫星系统的工程专家合作对规格进行详细审查。此外，由于模拟器的框架已经完成，我们已经将模拟器应用于实际卫星的开发，该卫星计划在几年内发射。也就是说，我们将这个模拟器应用于我们的非常小的卫星任务(纳米茉莉花项目)的开发。纳米茉莉花的目的是验证茉莉花太空任务的一些技术可行性，我们希望这个项目早日实现。作为应用的结果，卫星设计的详细研究取得了进展。此外，我们还研究了纳米茉莉花望远镜的性能、卫星的姿态控制、望远镜和卫星的温度变化，以及仪器的研制。目前正处于进一步发展的阶段，目标是早日发射纳米茉莉花卫星。较少

We are planning an infrared space astrometry mission which carries out high precision observations of positions and motions of stars. This mission is called JASMINE. The purpose of our research is to investigate some critical issues to be resolved, such as the observation strategy of JASMINE, and satellite specification, using a simulation system including the whole observation procedure. This simulator is called the JASMINE simulator and includes realistic models of the instruments and bus systems of JASMINE satellite.As concrete successful results, we have built an integrated simulation system in the JASMINE simulator, in which we used new software technologies, such as Object Oriented methodologies, Unified Modeling Language and so on. In the simulator, we classified the objects to be simulated into some components, such as "satellite bus system", "optics", "detector(on the focal plane), and "stars to be observed in the Galaxy". We have completed a framework in which we can easily m … More ake dependencies of an attribute of a component on other attributes of components though drawing a diagram.Furthermore we have developed each component and, using the simulator, we frequently investigated the observation strategy, and specifications of instruments taking into consideration of the satellite size, cost of the satellite and so on.Consequently, we could determine a basic specification and furthermore a detailed examination of the specification is progressing in cooperation with experts of the engineering, who concerns satellite systems.Furthermore, since the framework of a simulator has been completed, we have applied the simulator to development of an actual satellite whose launch is planned only in a few years. That is, we applied this simulator to development of our very small satellite mission(Nano-JASMINE project). The aim of Nano-JASMINE is to verify some technical feasibilities of JASMINE mission in the space and we hope the early realization of this project. As a result of application, the detailed investigations of satellite design has been progressed. Moreover, we have investigated performance of the Nano-JASMINE telescope, the attitude control of the satellite, thermal variations of both the telescope and the satellite, developing the instruments. It is now at the stage where further development is progressing, aiming at the early launch of the Nano-JASMINE satellite. Less