CROB
91301S001
CRPB
91301S002
CRQB 91301S003
DM#491
CRPB new station since 05-APR-2007
CRPB is not
in ITRF2005
CRQB is not
in ITRF2005. See DORISMail #0593
Preliminary
computations:
Geodetic
local tie is available in the DORISMail (from CROB to CRPB)
dE = dN =
0; dh = 0.150 m
Hence in
XYZ = 0.064 0.081 -0.109
CROB in
ITRF2005 is
CROB 2000.0
2719992.097 3463401.924 -4598608.144 -5.89 2.87 -2.67
Then, we
derive
CRPB 2000.0
2719992.161 3463402.005 -4598608.253 -5.89 2.87 -2.67
The
position, derived from DORIS solution (tf_070515a), using CROB velocity is
2000.0 CRPB
2719992.1578 3463402.0081 -4598608.2578 -5.89 2.87 -2.67
statistics
CRPB XYZ 0.0148 0.0144 0.0122 2
There is
just 2 weeks of data, so we need to verify this point later on. Current
difference is quite good for these 2 weeks: in XYZ (mm): -3 3 -5
Using more
DORIS data (ign07d02), we obtain :
2000.0 CRPB
2719992.1708 3463402.0079 -4598608.2457 -5.89 2.87 -2.67
statistics
CRPB XYZ 0.0023 0.0023 0.0018 42
so this is
in good agreement with the proposed model
For CRQB,
using latest available DORIS results (ignwd08) provides
2000.0 CRQB
2719992.2648 3463402.1322 -4598608.4004 -5.89 2.87 -2.67
statistics
CRQB XYZ 0.0027 0.0021 0.0022 31
While
coordinates in the DORISMail #593 are
X =
2719992.247 m Y = 3463402.117 m Z = -4598608.399 m
(sigma: 3
cm)
VX =
-0.0059 m/y VY = 0.0029 m/y VZ = -0.0027 m/y
SigVX =
0.0055 m/y SigVY = 0.0049 m/y SigVZ = 0.0041 m/y
This
provides a good agreement
Recommendation:
For CRQB use DORIS-derived results
2000.0 CRQB
2719992.2648 3463402.1322 -4598608.4004 -5.89 2.87 -2.67