Work Plan
The goal of the Working Group is to densify the latest realization of the ITRS and provide regional dense velocity information in a common global reference frame. For that purpose, working group members join efforts with the regional sub-commissions (AFREF, NAREF, SIRGAS, EUREF, ...) and analysis groups processing data from local/regional continuous and episodic GNNS stations.
STEP 1:
Dedicated region coordinators will gather as many as possible velocity
solutions for their region (Call for Participation) and combine these
solutions with the sub-commission regional solutions to produce a regional cumulative
combined solution in the
SINEX format.
STEP 2:
Combination coordinators will perform combinations of the regional
SINEX submissions and SINEX solutions from global GNSS networks like e.g. TIGA.
The
purpose of multiple combination coordinators is to evaluate both the results and
different approaches. To assist in this task, regional coordinators will solicit
discontinuity tables in addition to the SINEX solutions.
At the same time, the WG will also study the strengths and shortcomings of local/regional and continuous/episodic GNSS solutions to determine site velocities, and define optimal strategies for the combination of regional and global SINEX solutions.