In our last workshop we dealt with an initial set of the concepts that impact the definition and establishment of Datum Reference Frames, namely 1) Datum Features, 2) Composite Datum Features and 3) Datum Targets. In this column, we will address the remaining concepts, namely 4) Datum Feature and Datum Target Simulators, 5) Datums, 6) Datum Reference Frames, 7) Datum Reference Frame Components and Labels, and 8) Datum Reference Frame Mobility.
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