Figures and Statistics from the IGS Final Orbit Combination

Orbit and clock comparison figures

The WRMS plots below show the Weighted RMS (mm) of the individual AC orbit solutions with respect to the IGS Final products. The Clock Std Dev plots show the standard deviations (ns) of the individual AC clock solutions with respect to the IGS Final products. For display purposes, the daily RMS values from the Final combination summaries are weekly averaged.

WRMS of IGS Final orbits (raw) recent weeks GIF PS history GIF PS
WRMS of IGS Final orbits (smoothed) recent weeks GIF PS history GIF PS
Std Dev of IGS Final clocks recent weeks GIF PS history GIF PS

ERP comparison figures

The next plots show the difference between individual AC Final ERP solutions and the IGS Final product. The differences are shown for X-, and Y-pole, X-, and Y-pole rate, and LOD (length of day).

For the X-, and Y-pole figure the individual series are shifted by 1 mas.
For the X-, and Y-pole rate figure the individual series are shifted by 3 mas/day.
For the LOD figure the individual series are shifted by 0.2 ms/day.

AC Final ERP differences with IGS Finals

X-Pole recent weeks GIF PS history GIF PS
Y-Pole recent weeks GIF PS history GIF PS
X-Pole Rate recent weeks GIF PS history GIF PS
Y-Pole Rate recent weeks GIF PS history GIF PS
LOD recent weeks GIF PS history GIF PS


Orbit transformation results per AC

The next plots show the weekly averages of the Helmert translation, rotation, and scale parameters for the individual AC orbit solutions, with respect to the IGS Final products, compared to each other.

Trans. Rot. Trans. Rot.
GIF recent weeks Scale X Y Z X Y Z history Scale X Y Z X Y Z
PS recent weeks Scale X Y Z X Y Z history Scale X Y Z X Y Z


The next plots show the daily Helmert scale, translation, and rotation parameters for the individual AC orbit solutions separately, with respect to the IGS Final products. The orbit rotation plots also show associated polar motion (PM) offsets to check for rotational consistency (-dPMy with RX; -dPMx with RY). Recall that small AC SINEX rotational offsets were applied in the orbit combination process to all the AC orbit and PM values in order to align them consistently to the current IGS reference frame.

The translations are shifted by 50 mm. The rotations are shifted by 1 mas.


Scale/Translations from:

    recent weeks      history
GIF cod emr esa gfz grg jpl mit ngs sio igr | cod emr esa gfz grg jpl mit ngs sio igr
PS cod emr esa gfz grg jpl mit ngs sio igr | cod emr esa gfz grg jpl mit ngs sio igr

Rotations from:

    recent weeks      history
GIF cod emr esa gfz grg jpl mit ngs sio igr | cod emr esa gfz grg jpl mit ngs sio igr
PS cod emr esa gfz grg jpl mit ngs sio igr | cod emr esa gfz grg jpl mit ngs sio igr


 

09 June 2010, originator J. Ray