Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche
Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche
Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche
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Strenghts :<br />
Contribution of Geo<strong>de</strong>tic Techniques to the ITRF<br />
Mix of techniques<br />
is fundamental to<br />
realize a frame that<br />
is stable in origin,<br />
scale, and with<br />
sufficient coverage<br />
Technique<br />
Signal<br />
Source<br />
Obs. Type<br />
Ce<strong>les</strong>tial<br />
Frame & UT1<br />
Polar Motion<br />
VLBI<br />
Microwave<br />
Quasars<br />
Time difference<br />
Yes<br />
Yes<br />
SLR<br />
Optical<br />
Satellite<br />
Two-way absolute<br />
range<br />
No<br />
Yes<br />
GPS<br />
Microwave<br />
Satellites<br />
Range change<br />
No<br />
Yes<br />
DORIS<br />
No<br />
Yes<br />
Scale<br />
Yes<br />
Yes<br />
Yes<br />
Yes<br />
From:<br />
Ries et al., 2005,<br />
(Modified)<br />
Geocenter<br />
ITRF Origin<br />
Geographic<br />
Density<br />
No<br />
No<br />
Yes<br />
No<br />
Yes<br />
Yes<br />
Yes<br />
Yes<br />
Real-time &<br />
ITRF access<br />
Yes<br />
Yes<br />
Yes<br />
Yes<br />
Decadal<br />
Stability<br />
Yes<br />
Yes<br />
Yes<br />
Yes<br />
ITRF Orientation time evolution Yes Yes Yes<br />
Journées <strong>Recherche</strong> IGN 11 mars 2009<br />
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