Colombo

COLA 23501S001

JoG COLA break on 16-NOV-1994

Earthquake

IDS COLA break on 16-NOV-1994

ITRF COLA

IDS COLA break on 01-JUL-2001

ITRF COLA break on 01-JUL-2001

Preliminary computations:

From start to 16-NOV-1994

ITRF2005 solution is :

2000.0 COLA 1113278.5418 6233646.2717 760276.8879 -46.65 4.86 37.47

Using DORIS weekly solutions in ITRF2005 (ign07d02) and fixing the velocity to the above value, we obtain :

2000.0 COLA 1113278.5400 6233646.2606 760276.8791 -46.65 4.86 37.47

statistics COLA XYZ 0.0042 0.0033 0.0032 61

so this is in good agreement with the ITRF2005 value

From 16-NOV-1994 to 01-JUL-2001

The ITRF2005 solution is :

2000.0 COLA 1113278.5012 6233646.2931 760276.8317 -46.65 4.86 37.47

Using DORIS weekly solutions in ITRF2005 (ign07d02) and fixing the velocity to the above value, we obtain :

2000.0 COL1 1113278.4949 6233646.2797 760276.8228 -46.65 4.86 37.47

statistics COL1 XYZ 0.0018 0.0012 0.0014 230

so this is in good agreement with the ITRF2005 value

For the period after 01-JUL-2001

The ITRF2005 solution is :

2000.0 COLA 1113278.5281 6233646.2898 760276.8212 -46.65 4.86 37.47

Using DORIS weekly solutions in ITRF2005 (ign07d02) and fixing the velocity to the above value, we obtain :

2000.0 COL2 1113278.5259 6233646.2810 760276.8212 -46.65 4.86 37.47

statistics COL2 XYZ 0.0014 0.0011 0.0013 170

so this is in good agreement with the ITRF2005 value

Recommendation:

Use the ITRF2005 coordinates