• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>IEEE Aerospace Conference >Discovering the Sky at the Longest Wavelengths (DSL)
【24h】

Discovering the Sky at the Longest Wavelengths (DSL)

机译：在最长波长（DSL）处发现天空

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The radio sky at frequencies below~30 MHz is virtually unobservable from Earth due to ionospheric disturbances and the opaqueness of the ionosphere below ~10MHz, and also due to strong terrestrial radio interference. Deploying a radio observatory in space would open up this largely unexplored frequency band for science in astronomy, cosmology, geophysics, and space science. A Chinese-European team is proposing an ultra long wavelength (ULW) radio interferometer mission DSL (Discovering the Sky at the Longest Wavelengths). The proposed radio interferometer will be deployed in low-altitude lunar orbit, exploiting the radio quietness of the lunar far side. DSL will consist of a mother-spacecraft for data transport and control, plus eight small micro-satellites each equipped with three orthogonal dipoles. These satellites form a virtual distributed observatory with adjustable baselines, allowing different scientific observation strategies. The satellites are configured in a flexible quasi-linear array in nearly identical orbits, guaranteeing low relative drift rates. Short orbital periods and orbit precession ensure quick filling of the interferometric spatial frequency (u,v,w) space, enabling high quality imaging. The science themes considered for the DSL mission include pioneering studies of the unknown and exploratory science such as the search for signatures of the cosmological Dark Ages, complementing current (e.g. LOFAR) and future SKA telescope searches; full-sky continuum survey of discrete sources, including ultra-steep spectrum extragalactic sources, pulsars, and transients (galactic and extragalactic); full-sky map of continuum diffuse emission; solar-terrestrial physics, planetary sciences, and cosmic ray physics. The main frequency band covered is 1-30 MHz extending down to 0.1 MHz, and up to about 50 MHz for crossreferencing with ground-based instruments. DSL will support a variety of observational modes, including broad-band spectral analysis for Dark Ages, radio interferometric cross-correlations for imaging, and flexible raw data downlink capability. Data processing will be performed at radio astronomy science data centres in Europe and China.
机译：由于电离层扰动和电离层低于〜10MHz的电离层的不透明，频率低于〜30MHz的频率下的无线电天际几乎不可接受，也是由于强大的地面无线电干扰。在太空中部署无线电天文台将在天文学，宇宙学，地球物理学和空间科学中开辟这一大部分未开发的频段。中欧团队提出超长波长（ULW）无线电干涉仪Missis DSL（发现最长波长的天空）。所提出的无线电干涉仪将部署在低空月球轨道中，利用了农历远端的无线电安静。 DSL将包括用于数据传输和控制的母宇宙飞船，以及八个小型微卫星，每个小型卫星配备有三个正交偶极子。这些卫星形成一个具有可调节基线的虚拟分布式天文台，允许不同的科学观察策略。卫星在几乎相同的轨道中以柔性的准线性阵列配置，保证了低相对漂移速率。短轨道周期和轨道进程确保快速填充干涉空间频率（U，V，W）空间，从而实现高质量的成像。考虑为DSL任务的科学主题包括未知和探索性科学的先驱研究，例如搜索宇宙学暗年龄的签名，补充电流（例如洛杉矶）和未来的SKA望远镜搜索;对离散来源的全天连续体调查，包括超陡谱刷新来源，脉冲条和瞬变（银河系和丙乳酸）;连续弥漫释放的全天性地图;太阳能地球物理学，行星科学和宇宙射线物理学。覆盖的主频带为1-30 MHz，延伸到0.1 MHz，高达约50 MHz，用于与地面仪器交叉进行交叉。 DSL将支持各种观察模式，包括用于黑暗时代的宽带谱分析，用于成像的无线电干涉互连，以及灵活的原始数据下行链路能力。数据处理将在欧洲和中国的射频天文学科学数据中心进行。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号