ITRF 2005 and WGS84 (epoch 2000.0) coordinates for geodetic instruments

26-metre IVS VLBI antenna

X = 5085442.779 ± 0.001 m

Y = 2668263.544 ± 0.001 m

Z = –2768696.963 ± 0.001 m

dX = –0.0002 ± 0.0002 m/year

dY = 0.0193 ± 0.0002 m/year

dZ = 0.0173 ± 0.0002 m/year

φ = –25.8897515° = 25° 53′ 23″.105 South

λ = +27.6853931° = 27° 41′ 07″.415 East

H = 1415.710 ± 0.001 m

dN = 0.0194 ± 0.0003 m/year

dE = 0.0172 ± 0.0001 m/year

dH = 0.0004 ± 0.0002 m/year

HRAO IGS GNSS station

X = 5085352.481 ± 0.001 m

Y = 2668395.731 ± 0.001 m

Z = –2768731.621 ± 0.001 m

dX = –0.0019 ± 0.0001 m/year

dY = 0.0190 ± 0.0001 m/year

dZ = 0.0167 ± 0.0001 m/year

φ = –25.8901059° = 25° 53′ 24″.381 South

λ = +27.6869795° = 27° 41′ 13″.126 East

H = 1414.162 ± 0.001 m

dN = 0.0181 ± 0.0001 m/year

dE = 0.0177 ± 0.0000 m/year

dH = 0.0009 ± 0.0001 m/year

MOBLAS-6 ILRS SLR station

X = 5085401.106 ± 0.001 m

Y = 2668330.130 ± 0.001 m

Z = –2768688.814 ± 0.001 m

dX = 0.0006 ± 0.0002 m/year

dY = 0.0214 ± 0.0003 m/year

dZ = 0.0154 ± 0.0002 m/year

φ = –25.8897088° = 25° 53′ 22″.951 South

λ = +27.6861746° = 27° 41′ 10″.228 East

H = 1406.786 ± 0.001 m

dN = 0.0184 ± 0.0003 m/year

dE = 0.0187 ± 0.0002 m/year

dH = 0.0027 ± 0.0002 m/year

The WGS84 ellipsoid is 25.259 m above the EGM96 geoid at HartRAO.

Height of the barometer in the Control Room:

• 1381.264 m above EGM96 geoid

• 1406.523 m above WGS84 ellipsoid

• 9.187 m below 26-metre IVS VLBI antenna

• 7.639 m below HRAO IGS GNSS station

• 0.263 m below MOBLAS-6 ILRS SLR station