RIOA 41507S003
RIOB 41507S004
RIPB 41507S005
RIQB 41507S006
DM#536
RIQB new station since 17-APR-2008
DM#536
discontinuity found for RIPB on 04-JUN-2005 (<= 3mm)
Preliminary
computations:
RIOA and
RIOB coordinates adopted from original ITRF2005 values
RIOA 2000.0
1429849.9114 -3495346.4724 -5122723.0463 7.79 -9.05 5.93
RIOB 2000.0
1429854.1968 -3495342.3698 -5122725.1392 7.79 -9.05 5.93
However,
original ITRF2005 values cannot be adopted as such for RIPB as the discontinuity was detected on 04-JUN-2005
see DORISMail DM#536
was not known by the time of the ITRF2005 comboination
Original
ITRF2005 values for RIPB was
RIPB 2000.0
1429899.1701 -3495323.6044 -5122723.5477 7.79 -9.05 5.93
As the
discontinuity is small (< 3 mm), we decide to use the orignal ITRF2005
coordinates for the 2 considered periods
<
04-JUN-2005
RIPB 2000.0
1429899.1701
-3495323.6044
-5122723.5477
7.79 -9.06 5.93
>=
04-JUN-2005
RIPB 2000.0
1429899.1701
-3495323.6044
-5122723.5477
7.79 -9.06 5.93
For RIQB,
the geodetic local tie provided by IGN/SIMB is
RIPB ˆ RIQB 0.086 -0.211 -0.311
So the
derived RIQB position (from original RIPB ITRF2005 coordinates) is
RIQB 2000.0
1429899.2561 -3495323.8154 -5122723.8587 7.79 -9.06 5.93
We can test
these coordinates, using the recent DORIS data available for this station
If we fix
the velocity, and estimate only the position at epoch 200.0 using the first
available data, we obtain
2000.0 RIQB
1429899.2210 -3495323.8530 -5122723.8772 7.79 -9.06 5.93
statistics
RIQB XYZ 0.0109 0.0080 0.0059 5
Final
computation:
Recommendation:
Adopt the position derived using the geodetic local tie
RIQB 2000.0
1429899.2561 -3495323.8154 -5122723.8587 7.79 -9.06 5.93