1. Theodolite: Tachymat wild TC2002S Laser Distantiometer: Distomat Wild DI2002 Corner Cube reflector: Wild GPH1P East Up North M E 1 R N T 2 Local Survey Description Measured values: Azimuthal angle wrt an arbitrary direction Elevation angle wrt the horizontal plane determined using spirit level Slant distance

2. 1.Distances are corrected for atmospheric refraction using the “Barrel and Sears” formula 2.Conversion Az-El-Rn  Up-East-North 3.Determination of azimuthal orientation unknown 4.Application of astronomical azimuth to polaris 5.Minimal inner constraints solution via SVD Local Survey Data Processing GSMAT CONTROL FILEWILD FILESMETEO FILES Topocentric coordinates of the survey INPUT OUTPUT POLARIS

3. Number of markers 17 Number of measures 482 Local Survey Results

4. Local Survey Results – Up component

5. Determination of the VLBI Antenna Invariant Point (IVP) and Antenna Axis offset 1.Least squares to a sphere  center of the sphere = IVP 2.Least squares to a torus  center of the torus = IVP torus radius = antenna axis offset 3.Least squares to a slant torus

6. - Least squares fitting to a sphere N.r of observations = 874 Reduced chi square = 3.27358636 RMS = 0.00216674571 Parameter Value Error X0 9.805 m 0.204 mm Y0 -23.386 m 0.099 mm Z0 65.489 m 0.099 mm R$0 13.772 m 0.212 mm R$1 12.015 m 0.103 mm R$2 7.884 m 0.122 mm R$3 3.303 m 0.137 mm Correlation matrix: X0 1.000 Y0 -0.009 1.000 Z0 -0.025 0.181 1.000 R$0 -0.687 0.046 0.075 1.000 R$1 0.053 -0.041 0.078 -0.033 1.000 R$2 -0.101 -0.022 0.081 0.073 0.003 1.000 R$3 -0.075 -0.035 0.065 0.053 0.003 0.014 1.000 X0 Y0 Z0 R$0 R$1 R$2 R$3 IVP Survey Results