Investigation of sub-daily and episodic variations of Earth rotation observed by VLBI, ring laser gyroscopes and GNSS

研究 VLBI、环形激光陀螺仪和 GNSS 观测到的地球自转的次日和间歇变化

• 批准号: 5456281
• 负责人: Privatdozent Dr.-Ing. Axel Nothnagel
• 金额: --
• 依托单位: Institut für Geodäsie und Geoinformationstechnik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5456281?language=en
• 关键词: Investigation; sub; daily; episodic; variations

The primary objectives of project SPEED are to observe high-quality Earth rotation parameter (ERP) series over at least three years with a time resolution of one hour or less derived from various modern geodetic techniques, namely GNSS (GPS+GLONASS), VLBI, and ring laser gyroscopes, and to provide a concise interpretation of these series. The investigations will concentrate on an almost complete modeling of atmospheric and oceanic phenomena, which are the most likely source of short period variations of Earth rotation with periods of few days down to few hours. Because of the unprecented resolution of the observed ERP time series and the detailed modeling of atmospheric and oceanic excitation based on geophysical data quasi-periodic, a-periodic, and episodic variations of the ERP should be detectable for the first time. Within each technique validation of the results using different software packages for the same data and analyzing these data independently by two analysis centers will provide highest robustness and reliability.

SPEED项目的主要目标是在至少三年的时间内，以一小时或更短的时间分辨率观测来自各种现代大地测量技术（即GNSS (GPS+GLONASS)， VLBI和环形激光陀螺仪）的高质量地球自转参数（ERP）系列，并提供这些系列的简明解释。研究将集中于对大气和海洋现象的几乎完整的模拟，这些现象最有可能是地球自转短周期变化的来源，周期从几天到几小时不等。由于观测到的ERP时间序列具有前所未有的分辨率，并且基于地球物理数据对大气和海洋激励进行了详细的模拟，因此将首次探测到ERP的准周期、a周期和幕式变化。在每种技术中，使用不同的软件包对相同的数据进行结果验证，并由两个分析中心独立分析这些数据，将提供最高的稳健性和可靠性。

项目成果

Earth Rotation Observed by Very Long Baseline Interferometry and Ring Laser

甚长基线干涉仪和环形激光观测地球自转

• DOI: 10.1007/s00024-004-0487-z
• 发表时间: 2009
• 期刊: Pure and Applied Geophysics
• 影响因子: 2
• 作者: P. J. Mendes Cerveira;J. Boehm;H. Schuh;T. Klügel;A. Velikoseltsev;K. U. Schreiber;A. Brzezinski
• 通讯作者: A. Brzezinski

Assessment of periodic sub-diurnal Earth rotation variations at tidal frequencies through transformation of VLBI normal equation systems

• DOI: 10.1007/s00190-011-0457-z
• 发表时间: 2011-03
• 期刊: Journal of Geodesy
• 影响因子: 4.4
• 作者: T. Artz;Sarah Tesmer née Böckmann;A. Nothnagel

Earth Rotation

地球自转

• DOI: 10.1007/978-90-481-8702-7_177
• 发表时间: 2011
• 期刊: Encyclopedia of Solid Earth Geophysics
• 作者: H. Schuh;S. Böhm
• 通讯作者: S. Böhm

Universal time from VLBI single-baseline observations during CONT08

• DOI: 10.1007/s00190-010-0436-9
• 发表时间: 2011-07-01
• 期刊: JOURNAL OF GEODESY
• 影响因子: 4.4
• 作者: Nilsson, Tobias;Boehm, Johannes;Schuh, Harald
• 通讯作者: Schuh, Harald

Earth Rotation Parameters from Very Long Baseline Interferometry and Ringlaser Observables

来自甚长基线干涉测量和环形激光可观测数据的地球自转参数

• DOI: 10.1142/9789812836182_0010
• 发表时间: 2009
• 作者: P. J. Mendes Cerveira;H. Spicakova;H. Schuh;T. Klügel;K. U. Schreiber;A. Velikoseltsev
• 通讯作者: A. Velikoseltsev