MARA
30313S001
MARB
30313S002
MATB
30313S003
JoG MARB
data to be deleted 01-JAN-2004 to 15-AUG-2004 (end)
Antenna
movement
IDS MARB
break on 01-JAN-2003
IDS MARB
data to be deleted from 01-JUL-2004 to 15-AUG-2004
IDS MATB
data to be deleted from 11-APR-2006 to 30-APR-2006
ITRF MARB
break on 01-JAN-2003
DM#453
MATB antenna problem detected. Antenna was found broken near the base on
14-APR-2006
Detected
offset is dN=-78 mm, dE = +13 mm, dU = -7 mm
DM#479
MATB offsets
Start End
21-08-2004
12-04-2006* OK and centred
13-04-2006*
28-04-2006 Broken, skew (8 cm towards ESE)
29-04-2006
07-11-2006 Repaired, slightly skew (1 cm towards NW)
09-11-2006
current New antenna, centred
PW MATB
delete data from 01-JAN-2006 to 29-APR-2006
Antenna
movement
We need to
verify if the position after and before the data gap are the same (01-JAN-06 to
29-APR-2006)
In ITRF2005
MATB is
2000.0 MATB
3448405.7441 2680356.3825 -4632640.5719 -3.77 4.67 0.60
Before the
break, usng DORIS weekly solutions (ign07d02) using fixed ITRF2005 we get :
2000.0 MATB
3448405.7523 2680356.3807 -4632640.5628 -3.77 4.67 0.60
statistics
MATB XYZ 0.0024 0.0021 0.0015 67
so this is very close to ITRF2005 solution
Using data after the data gap, we obtain :
2000.0 MAT1 3448405.7603 2680356.3718 -4632640.5680 -3.77 4.67 0.60
statistics MAT1 XYZ 0.0017 0.0018 0.0013 91
this is also compatible with ITRF2005. We donÕt need to add a second
solution (position/velocity) for MATB after APR-2006. However when combining
weekly solution, it is suggested that ACs introduce a break in their time
series in order to stay on the safe side.
Recommendation: