Hartebeesthoek

 

HBKA 30302S202

HBLA 30302S005

HBKB 30302S006

HBLB 30302S006 (HBLB = HBKB)

HBMB 30302S008

 

DM#474 HBMB new station since 22-NOV-2006 + (HBKB = HBLB)

 

HBMB not in ITRF2005

 

Preliminary computations:

 

Geodetic local tie from SIMB is

 

HBMB 30302S008 HBKB 30302S006 -0.138 -0.075 0.075 0.001

HBMB 30302S008 HBLA 30302S005 -11.971 2.687 -26.814 0.002

 

So, we have

 

HBMB

 

HBLA in ITRF2005 is

 

HBLA 2000.0 5084641.470 2670349.993 -2768497.791 0.03 19.92 16.41

 

So, we derive

 

HBMB 2000.0 5084653.441 2670347.306 -2768470.977 0.03 19.92 16.41

 

DORIS-derived position (tf_070515a) using fixed ITRF2005 from HBLA gives

 

2000.0 HBMB 5084653.4912 2670347.2740 -2768470.9840 0.03 19.92 16.41

statistics HBMB XYZ 0.0067 0.0077 0.0051 6

 

There is just 6 weeks of DORIS but the difference is quite significant.

 

Requires further investigation XYZ/mm +187 +43 -82

 

With more recent DORIS data (ign07d02) and fixing the velocity to ITRF2005, we get

 

2000.0 HBMB 5084653.4663 2670347.3021 -2768470.9889 0.03 19.92 16.42

statistics HBMB XYZ 0.0022 0.0024 0.0017 46

 

so it is in good agreement with ITRF2005

Recommendation:

 

Use geodetic local tie to estimate HBMB + verify with DORIS data

HBMB 30302S008 HBKB 30302S006 -0.138 -0.075 0.075 0.001