ROTA
66007S001
ROTB
66007S002
ROUB
66007S003
IDS ROTA
break on 20-FEB-1997
ITRF ROTA
break on 20-FEB-1997
DM#375
ROTB new station since 01-MAR-2005
PW ROTB is
in ITRF2005 but uses very few DORIS data. The coordinates mostly come from the
local tie
Preliminary
computations:
ROTB in
ITRF2005 is
ROTB 2000.0
909182.595 -2264787.387 -5873052.235 19.86 -4.44 0.83
DORIS
derived (ign07d02) using fixed velocity is
2000.0 ROTB
909182.5742 -2264787.3901 -5873052.2370 19.86 -4.44 0.83
statistics
ROTB XYZ 0.0010 0.0012 0.0012 119
This is
compatible with the ITRF2005 published coordinates
In
ITRF2005, ROTA is (before break)
ROTA 2000.0
909378.238 -2264934.554 -5872956.862 19.86 -4.43 0.83
In
ITRF2005, ROTA is (after the break)
ROT1 2000.0
909378.237 -2264934.546 -5872956.863 19.86 -4.43 0.83
So the
break does not seem to be significant after all.
Geodetic
local tie is
ROTB
66007S002 ROTA 66007S001 195.643 -147.167 95.373 0.001
Using
recent DORIS weekly solutions (ign07d02) and fixing velocity to the ITRF2005
value, we obtain
2000.0 ROUB
909182.5913 -2264787.4401 -5873052.3846 19.86 -4.44 0.83
statistics
ROUB XYZ 0.0019 0.0015 0.0015 44
Final
computation:
Geodetic
local (from SIMB) is
ROUB -->
ROTB : -0.021 0.053 0.139 sig = 0.001
ROUB -->
ROTA : 195.622 -147.114 95.513
sig
= 0.002
As ROTB, in
ITRF2005 is :
2000.0 ROTB
909182.5947 -2264787.3867 -5873052.2349 19.86 -4.44 0.83
we obtain:
2000.0 ROUB
909182.616 -2264787.440 -5873052.374 19.86 -4.44 0.83
Using DORIS
weekly solutions (ign07d02) and fixing the velocity to the above ITRF2005
values, we obtain :
2000.0 ROUB
909182.5938 -2264787.4420 -5873052.3875 19.86 -4.44 0.83
statistics
ROUB XYZ 0.0034 0.0027 0.0024 11
which
provides a good confirmation
Recommendation:
ROTB use original ITRF2005 coordinates
2000.0 ROUB
909182.616 -2264787.440 -5873052.374 19.86 -4.44 0.83