Výsledky vyhledávání - "Zhangzhen Sun"

Akademický článek

Middle- and Long-Term UT1-UTC Prediction Based on Constrained Polynomial Curve Fitting, Weighted Least Squares and Autoregressive Combination Model

Autor: Yuguo Yang, Tianhe Xu, Zhangzhen Sun, Wenfeng Nie, Zhenlong Fang

Publikováno v: Remote Sensing, Vol 14, Iss 14, p 3252 (2022)

Universal time (UT1-UTC) is a key component of Earth orientation parameters (EOP), which is important for the study of monitoring the changes in the Earth’s rotation rate, climatic variation, and the characteristics of the Earth. Many existing UT1-

Externí odkaz: https://doaj.org/article/5971bb6f4ad84b3eaae389fe8af83671

Zobrazit plný text záznamu

Plný text ve formátu HTML

Akademický článek

Evaluation of Zenith Tropospheric Delay Derived from ERA5 Data over China Using GNSS Observations

Autor: Chunhua Jiang, Tianhe Xu, Shuaimin Wang, Wenfeng Nie, Zhangzhen Sun

Publikováno v: Remote Sensing, Vol 12, Iss 4, p 663 (2020)

The latest reanalysis of the European Center for Medium-Range Weather Forecasts (ECMWF), ERA5, can provide atmospheric data for calculating Zenith Tropospheric Delay (ZTD) with hourly temporal resolution, which is a key factor in Global Navigation Sa

Externí odkaz: https://doaj.org/article/29032ae5b7ba49469c2f32beedcdc8fc

Zobrazit plný text záznamu

Akademický článek

Prediction of earth rotation parameters based on improved weighted least squares and autoregressive model

Autor: Zhangzhen, Sun, Tianhe, Xu

Publikováno v: In Geodesy and Geodynamics August 2012 3(3):57-64

Zobrazit plný text záznamu

Analysis on the differences between EOP 08C04 and EOP 14C04 related to the Earth rotation characteristics

Autor: Shi'e Zhou, Nan Jiang, Yuguo Yang, Tianhe Xu, Chunhua Jiang, Zhangzhen Sun

Publikováno v: Journal of Spatial Science. 67:111-127

February 1, 2017, EOP 14C04 aligned to the ITRF2014 was adopted by IERS. To assess the improvement of EOP 14C04, the differences between EOP 14C04 and EOP 08C04 are firstly analyzed. Then, the caus...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12b5a610f5ecf2cd51d8d1d597f48bb0
https://doi.org/10.1080/14498596.2020.1715273

Zobrazit plný text záznamu

A parallel equivalence algorithm based on MPI for GNSS data processing

Autor: Guochang Xu, Yujun Du, Tianhe Xu, Zhangzhen Sun, Chunhua Jiang

Publikováno v: Journal of Spatial Science. 66:513-532

A modified algorithm combining equivalence theory with MPI technology to improve Global Navigation Satellite System data processing efficiency is presented. The reservation of covariance matrix, el...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::730a4d8dccaa4bfa9a8825114ba48596
https://doi.org/10.1080/14498596.2019.1696718

Zobrazit plný text záznamu

An improved prediction algorithm for Earth’s polar motion with considering the retrograde annual and semi-annual wobbles based on least squares and autoregressive model

Autor: Tianhe Xu, Nan Jiang, Yuguo Yang, Chunhua Jiang, Zhangzhen Sun

Publikováno v: Acta Geodaetica et Geophysica. 54:499-511

Earth Rotation Parameters (ERP) are indispensable in the transformation between the Celestial Reference Frame and the Terrestrial Reference Frame, and significant for high-precision space navigation and positioning. As a key parameter in ERP, Polar M

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f9041f08f51a6c42dabc2952e4412df
https://doi.org/10.1007/s40328-019-00274-4

Zobrazit plný text záznamu

Plný text ve formátu HTML

Earth orientation parameters prediction based on the hybrid SSA + LS + SVM model

Autor: Yuguo Yang, Wenfeng Nie, Tianhe Xu, Zhenlong Fang, Huijie Xue, Zhangzhen Sun

Publikováno v: Measurement Science and Technology. 33:125011

The high-precision prediction of Earth orientation parameters (EOPs) is essential for astro-geodynamics, high-precision space navigation and positioning, on-board autonomous orbits determination and deep space exploration. However, the prediction acc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bf7b1dc5f8966b1a36102909523b8614
https://doi.org/10.1088/1361-6501/ac8ec6

Zobrazit plný text záznamu

The Quality Assessment of Non-Integer-Hour Data in GPS Broadcast Ephemerides and Its Impact on the Accuracy of Real-Time Kinematic Positioning Over the South China Sea

Autor: Fan Gao, Tianhe Xu, Chuanhua Jiang, Guochang Xu, Zhangzhen Sun

Publikováno v: Computer Modeling in Engineering & Sciences. 119:263-280

The abnormal effect in the GPS broadcast ephemeris could cause significant influence on the real-time navigation and positioning solution by using orbit and clock error data provided by GPS broadcast ephemeris. In this paper, three types of non-integ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::514d34e6c6f683a6dcd0378ae1704b5b
https://doi.org/10.32604/cmes.2019.04425

Zobrazit plný text záznamu

Evaluation of Zenith Tropospheric Delay Derived from ERA5 Data over China Using GNSS Observations

Autor: Wenfeng Nie, Tianhe Xu, Zhangzhen Sun, Shuaimin Wang, Chunhua Jiang

Publikováno v: Remote Sensing; Volume 12; Issue 4; Pages: 663
Remote Sensing, Vol 12, Iss 4, p 663 (2020)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de85c0710c7abb172eb2a713fd555eaf

Zobrazit plný text záznamu

Middle and long-term prediction of UT1-UTC based on combination of Gray Model and Autoregressive Integrated Moving Average

Autor: Tianhe Xu, Song Jia, Jia-jing Li, Zhangzhen Sun

Publikováno v: Advances in Space Research. 59:888-894

UT1-UTC is an important part of the Earth Orientation Parameters (EOP). The high-precision predictions of UT1-UTC play a key role in practical applications of deep space exploration, spacecraft tracking and satellite navigation and positioning. In th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::95485e416d52006b182bffca8f1c949e
https://doi.org/10.1016/j.asr.2016.05.044

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání