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Figure 10 (a) Downlink sum rate in one sector versus mobile station position for base station coordination, shared relaying, and direct transmission.
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Adjustment of the station positions for displacement by the mean flow reduces the latter error by about half.
These reference frames typically account only for station position and linear velocities.
C04 (left scale) as a function of the constraint level for the station position estimation of Kokee.
Fig. 10 Impact of station position estimation.
We present results obtained from the analysis of the DORIS time series for station positions, network translation and scale parameters, as well as for the terrestrial pole coordinates.
The evaluated SINEX free-network (inawd08) weekly solutions for station positions and polar motion have been submitted to the IDS Combination Center.
We show in particular that the precisions of the current IDS products range between 1.5 to 2.6 mm for station positions (at the epochs of minimum variances); better than 1 mm/yr in velocities and between 170 and 260 micro-arc-seconds for polar motion, a significant improvement by a factor of three to five, compared to past data used in the ITRF2005 combination.
On the basis of LAGEOS-1 and LAGEOS-2 data we computed a 10-years (1990 2000) solution for SLR station positions and velocities.
The NASA GSFC DORIS analysis center has provided weekly DORIS solutions from November 1992 to January 2009 8399 SINEX files) of station positions and Earth Orientation Parameters for inclusion in the DORIS contribution to ITRF2008.
In order to meet the future requirements of the Global Geodetic Observing System (GGOS, (Plag and Pearlman 2009)) and reach 1-mm accuracy for the station positions, the global geodetic VLBI network is currently being upgraded to the VLBI Geodetic Observing System (VGOS, (Behrend et al. (2008; Petrachenko et al. 2009)).
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