• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International astronautical congress >GIMS: AN INSTRUMENT FOR TYPHOON MONITORING FROM GEOSTATIONARY EARTH ORBIT
【24h】

GIMS: AN INSTRUMENT FOR TYPHOON MONITORING FROM GEOSTATIONARY EARTH ORBIT

机译：GIMS：从地球静止轨道进行台风监测的仪器

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

摘要

Typhoon is mature tropical cyclone generated in northwestern Pacific Ocean. Typhoon-related disasters caused lots of damages in the East and Southeast Asia every year, imposing significant negative effects on the social economic developments in this region. In China, there are almost 20 typhoons that can bring impacts and cause damages to the eastern coastal area per year, about 7-8 out of them landed on the continent. The existing typhoon observations from space are largely depended on the optical/infrared sensors onboard GEO meteorological satellite and also the optical/infrared and microwave sensors onboard LEO meteorological satellites. Microwave observation from GEO is demanding due to its cloud-penetration capability, which can continuously provide the inner thermal/humidity structure of typhoon. However, this tool is still missing because of the technical challenges. The largest obstacle of GEO microwave sounding is the required spatial resolution, since the GEO altitude increases 60 times as compared to LEO. GEM/GOMAS concept was proposed in 1990's, based on 2.5-3m real aperture reflector, covering frequencies from 53GHz-424GHz. Manufacturing, testing and scanning such a large antenna aperture at sub-millimeter wave band in space are difficult. Interferometric aperture synthesis is another possible solution to this problem, by using a thinned antenna array to replace the single large aperture antenna. Especially for the relative low sounding frequency (50-56GHz), aperture synthesis has now been deemed as the most suitable and practical approach for space implementation at the timeframe in 2015-2020. Based on this technology, NASA/JPL and ESA proposed GEOSTAR and GAS concept, and developed ground-based demonstrators respectively. The Geostationary Interferometric Microwave Sounder (GIMS) is millimeter wave imaging sounder concept proposed for China's next generation geostationary meteorological satellite (FY-4M). GIMS is supposed to utilize a rotating circular thinned array, instead of a stationary Y-shape array, to reduce the required number of the antenna elements. A full-scale ground-based 53GHz GIMS demonstrator with 28 elements has been successfully developed and tested. In this paper, the current efforts on GEO microwave sounding instrument will be reviewed. The GIMS concept will be introduced. The system design and imaging performance of the ground-based demonstrator will also be presented. At last, two possible technical resolutions for future space-borne GIMS will be discussed, including a so-called dual-mode system concept (including both synthetic aperture mode for 53GHz, and real aperture mode for frequencies above 183GHz), and also a 53/183GHz synthetic aperture system which might be a good opportunity to introduce international contributions.
机译：台风是西北太平洋产生的成熟热带气旋。与台风有关的灾难每年在东亚和东南亚造成很多损失，对该地区的社会经济发展产生了重大的负面影响。在中国，每年有近20种台风会给东部沿海地区带来影响并造成破坏，其中约有7-8台降落在该大陆上。现有的太空台风观测在很大程度上取决于GEO气象卫星上的光学/红外传感器以及LEO气象卫星上的光学/红外和微波传感器。由于具有云穿透能力，可以连续提供台风的内部热/湿结构，因此对GEO进行微波观测的要求很高。但是，由于技术挑战，该工具仍然缺失。 GEO微波探测的最大障碍是所需的空间分辨率，因为与LEO相比，GEO高度增加了60倍。 GEM / GOMAS概念是在1990年代提出的，基于2.5-3m的实际孔径反射器，覆盖53GHz-424GHz的频率。在太空中亚毫米波段很难制造，测试和扫描如此大的天线孔径。干涉式孔径合成是解决此问题的另一种可能的方法，方法是使用变薄的天线阵列来代替单个大孔径天线。特别是对于相对较低的探测频率（50-56GHz），孔径合成现在被认为是在2015-2020年的时间范围内实施空间的最合适和最实用的方法。基于这项技术，NASA / JPL和ESA提出了GEOSTAR和GAS概念，并分别开发了地面演示器。对地静止干涉微波测深仪（GIMS）是为中国下一代对地静止气象卫星（FY-4M）提出的毫米波成像测深仪概念。 GIMS应该利用旋转的圆形变细阵列代替固定的Y形阵列，以减少所需的天线元件数量。具有28个元件的全尺寸，基于地面的53GHz GIMS演示器已经成功开发和测试。本文将对GEO微波测深仪目前的工作进行回顾。将介绍GIMS概念。还将展示地面演示器的系统设计和成像性能。最后，将讨论未来太空GIMS的两种可能的技术解决方案，包括所谓的双模系统概念（包括53GHz的合成孔径模式和183GHz以上的频率的实际孔径模式）以及53 / 183GHz合成孔径系统可能是引入国际贡献的好机会。

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