Combination at the Observation Level - IERS
Combination at the Observation Level - IERS
Combination at the Observation Level - IERS
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Can technique combin<strong>at</strong>ion <strong>at</strong> <strong>the</strong> observ<strong>at</strong>ion levelimprove accuracy and consistency of EOP, TRF, CRF?<strong>IERS</strong> has cre<strong>at</strong>ed a dedic<strong>at</strong>ed framework for studying combin<strong>at</strong>ion:2002 – cre<strong>at</strong>ion of <strong>the</strong> <strong>IERS</strong> <strong>Combin<strong>at</strong>ion</strong> Research Centres (11 CRCs)2004 – <strong>IERS</strong> proposal of <strong>Combin<strong>at</strong>ion</strong> Pilot Project (CPP)2009 (21-22 October) – kick-off meeting of <strong>the</strong> COL-WG“<strong>Combin<strong>at</strong>ion</strong> <strong>at</strong> <strong>the</strong> Observ<strong>at</strong>ion <strong>Level</strong>” Working Group charter:COL-WG major task will be to study methods and advantages of combiningtechniques <strong>at</strong> <strong>the</strong> observ<strong>at</strong>ion level, searching for an optimal str<strong>at</strong>egy to solvefor geodetic parameters. Demonstr<strong>at</strong>ion should be based on weekly combinedSINEX files (containing unconstrained normal equ<strong>at</strong>ions of st<strong>at</strong>ion coordin<strong>at</strong>es,EOPs, nut<strong>at</strong>ion parameters and eventually quasar coordin<strong>at</strong>es) from all spacegeodetic techniques toge<strong>the</strong>r.
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