Shanghai Astronomical Observatory (SHAO) has long history in research of Astronomy and Geodesy. The Center for Astro-geodynamics Research (SCAR) engages in measurement and analysis of the motion of the Earth and underlying dynamical mechanisms using the modern space techniques, including space Geodesy and astronomy. We operate a core site (Shanghai) with co-location of VLBI,SLR and GNSS equipments in the supporting the GGOS geodetic core network. We maintained the analysis centers for VLBI, SLR and GNSS.
SHAO hosts the Central Bureau of the Asia-Pacific Space Geodynamics (APSG) program, which unites all relevant activities in the Asia-Pacific region into a cooperative research project in plate tectonic, crustal motion and deformation, and sea level changes.
SHAO is the current one of collaborative coordinators in the establishment of the Crustal Movement Observation Network of China (CMONOC), which includes ~260 fiducial sites and ~2000 campaign sites and serves for GPS meteorology, network RTK, disaster early warning and monitoring, space weather research etc.
The Group of GNSS Data Analysis and Applications at SHAO (GGDAA) was established early 2011. Shortly after the setup of the GGDAA, we start the IGR-like GNSS data analysis using GNSS data from the global network together the CMONOC network. After a period of experimental operation, the system is in routine operation with good stability and precision. Our products have been utilized and acknowledged in many key space programs of China.
The ongoing tasks and activities of GGDAA are:
The GNSS data analysis at SHA is the integrated GNSS solution [Presentation at IGS Bias Workshop 2012] with products presented in the same ITRF reference frames. In particular, the GLONASS satellite clocks are in the same time frame as GPS, aligned to GPS broadcast (GPST). Both GPS and GLONASS clocks are provided with a sampling of 30 seconds.
We are working towards:
Daily GPS orbits from SHA and IGS ACs are compared with IGS finals using 7-parameter Helmert transformation, showing RMS in mm.
Daily GPS clocks (30-s sampling) from SHA are compared with IGS ACs' and IGS finals, showing RMS in ns.
Orbits
[ recent weeks ] [
all ]
Clocks [ recent weeks ] [ all ]
Daily GLONASS orbits from SHA and IGS ACs are compared with IGS finals using 7-parameter Helmert transformation, showing RMS in mm.
Daily GLONASS clocks(30-s sampling) from SHA are compared with IGS ACs' and IGS finals, showing RMS in ns.
Orbits
[ recent weeks ] [
all ]
Clocks [ recent weeks ] [ all ]
Daily ERPs from SHA are compared with IGS rapid products, showing residuals.
Recent weeks: LOD POLE POLE-rate ALL: LOD POLE POLE-rate
Translation Rotation Translation Rotation
Recent weeks: Scale [ X - Y - Z ] [ X - Y - Z ] ALL: Scale [ X - Y - Z ] [ X - Y - Z ]
TO
[ recent weeks ] [
all ]
We thank the computer information center of SHAO for the web construction and maintenance. The IGS is acknowledged by providing input data and products. GGDAA is supported by the "One hundred Talents" program of the CAS, the NSFC and the "863 Program" funding.
Citation: Junping Chen, Bin Wu, Xiaogong Hu, Haojun Li. (2012), SHA: the GNSS Analysis Center at SHAO, in Lecture Notes in Electrical Engineering, v 160 LNEE, p 213-221, 2012, Proceedings - 3rd China Satellite Navigation Conference, CSNC 2012, Revised Selected Papers
30 Mar. 2013, originator
J.Chen
