权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

FOR 1503: Space-Time Reference Systems for Monitoring Global Change and for Precise Navigation in Space

FOR 1503：用于监测全球变化和空间精确导航的时空参考系统

基本信息

批准号：
165956021
负责人：
金额：
--
依托单位：
Lehrstuhl für Geodäsie
依托单位国家：
德国
项目类别：
Research Units
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/165956021?language=en
关键词：
1503 Space Time Reference Systems

项目摘要

The concepts of reference systems are as old as the first geometric considerations of the shape of bodies in general and of the Earth in particular. Reference systems are, thus, an indispensable component for the description of the geometry and the kinematics of the Earth and other objects in space. Since the determination of geometrical properties of these objects has gained more and more relevance, the issues of the appropriate reference systems became even more important. Today, accurate form parameters of space objects are of interest while for the Earth monitoring and quantifying Global Change are in the focus of scientific investigations. The main objective of the Research Unit is to develop integrative methods and procedures for a consistent definition and realisation of reference systems on Earth and in space. Although many realisations of reference systems exist already, they are used independently and suffer from inconsistencies. In an environment of ever increasing observing capabilities as well as of social and scientific needs, a framework of reference systems will be produced, which are linked consistently with an appropriate level of accuracy to guarantee a solid basis for measuring geometric effects of Global Change and for high-precision navigation near Earth and in deep space. The contributions of various groups active in geodetic, astronomical and space sciences will enable a comprehensive interdisciplinary treatment of reference systems. In order to concatenate the existing astronomical and geodetic observing material into a consistent framework, it is necessary to improve the theoretical foundations and the practical processes for the realisation. In six projects, barycentric ephemerides, moon-related systems and satellite-based dynamic reference systems as well as Earth-based systems will be developed further and brought together consistently. Models have to be improved for the combination of the observations of different space-geodetic observations like Very Long Baseline Interferometry, precise GPS, Satellite Laser Ranging and Lunar Laser Ranging with millimetre accuracy. As a final result, a consistent set of reference systems for the Earth, artificial satellites, the Moon, selected planets and for the far-distant compact radio galaxies will be realised with unprecedented accuracy.

参考系的概念与一般物体和特别是地球的形状的第一次几何考虑一样古老。因此，参照系是描述地球和其他空间物体的几何形状和运动学的一个不可或缺的组成部分。由于确定这些物体的几何特性已获得越来越多的相关性，适当的参考系统的问题变得更加重要。今天，空间物体的精确形状参数令人感兴趣，而对地球而言，监测和量化全球变化则是科学调查的重点。该研究单位的主要目标是制定综合方法和程序，以统一定义和实现地球和空间的参考系。虽然已经存在许多参考系统的实现，但它们都是独立使用的，并且存在不一致性。在观测能力不断提高以及社会和科学需要不断增加的情况下，将建立一个参照系统框架，这些参照系统以适当的准确度相互联系，以保证为测量全球变化的几何影响以及近地和深空高精度导航奠定坚实的基础。活跃在大地测量、天文学和空间科学领域的各个团体的贡献将有助于对参照系进行全面的跨学科处理。为了将现有的天文学和大地测量观测材料连接成一个一致的框架，有必要改进实现的理论基础和实际过程。在六个项目中，将进一步开发重心星历表、与月球有关的系统和卫星动态参照系统以及地球系统，并将这些系统连贯地结合在一起。必须改进各种模型，以便将各种不同的空间大地测量观测结合起来，如甚长基线干涉测量、精确的全球定位系统、卫星激光测距和毫米精度的月球激光测距。作为最终结果，将以前所未有的精度实现一套一致的参考系统，用于地球、人造卫星、月球、选定的行星和遥远的致密射电星系。