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A Global Combination of Geodetic Techniques at the Observation Level: New Perspectives on the Terrestrial Reference Frame
Journal of Geophysical Research: Solid Earth ( IF 3.9 ) Pub Date : 2024-12-17 , DOI: 10.1029/2024jb029527
B. Haines, W. Bertiger, S. Desai, M. Ellmer, M. Heflin, D. Kuang, G. Lanyi, C. Naudet, A. Peidou, P. Ries, A. Sibois, X. Wu

We describe the development and assessment of a new terrestrial reference frame (TRF) based on a combination of geodetic techniques at the observation level over the period 2010–2022. Included in the solution are observations from the Global Positioning System (GPS), Satellite Laser Ranging (SLR) and Very Long Baseline Interferometry (VLBI). A key feature of our solution strategy is the use of space ties in low-Earth orbit to connect SLR to GPS. Though the resulting TRF solution is based on only 12.6 years of data, it is competitive with the international (ITRF2020) standard in terms of fundamental frame parameters (origin and scale) and their temporal evolution, both linear and seasonal. The relative rates of origin (3D) and scale (at Earth's surface) are 0.2 mm yr 1 ${\text{yr}}^{-1}$ and 0.1 mm yr 1 ${\text{yr}}^{-1}$ respectively. Absolute scale and 3D origin (at epoch 2015.0) both differ by 2–3 mm. In addition to station positions and velocities, our combined solution includes Earth orientation parameters (EOP), low-degree zonal coefficients (J2 and J3) of the geopotential and precise orbit solutions for all participating satellites (GPS, GRACE and GRACE Follow-on tandems, Jason 2 and 3, and LAGEOS 1 and 2). We discuss potential benefits of our solution strategy and characterize the impacts of our new TRF on estimates of geocenter motion and sea level change from satellite altimetry.

中文翻译:


观测层面大地测量技术的全球组合:陆地参考系的新视角



我们描述了 2010-2022 年期间基于观测层面大地测量技术组合的新陆地参考系 (TRF) 的开发和评估。该解决方案包括来自全球定位系统 (GPS)、卫星激光测距 (SLR) 和甚长基线干涉测量 (VLBI) 的观测数据。我们解决方案策略的一个关键特点是在近地轨道上使用空间连接,将 SLR 连接到 GPS。尽管最终的 TRF 解决方案仅基于 12.6 年的数据,但它在基本帧参数(原点和规模)及其时间演变(线性和季节性)方面与国际 (ITRF2020) 标准具有竞争力。相对起源速率 (3D) 和比例尺(在地球表面)分别为 0.2 毫米 yr 1 ${\text{yr}}^{-1}$ 和 0.1 毫米 yr 1 ${\text{yr}}^{-1}$ 。绝对比例尺和 3D 原点(在 epoch 2015.0 处)都相差 2-3 毫米。除了台站位置和速度外,我们的组合解决方案还包括地球定向参数 (EOP)、位势的低度纬向系数(J2 和 J3)以及所有参与卫星的精确轨道解决方案(GPS、GRACE 和 GRACE 后续串联、Jason 2 和 3,以及 LAGEOS 1 和 2)。我们讨论了解决方案策略的潜在好处,并描述了我们的新 TRF 对卫星测高估计的地心运动和海平面变化的影响。
更新日期:2024-12-18
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