Review of Root-Mean-Square Error Calculation Methods for Large Deployable Mesh Reflectors

Table 1

Comparison of RMS error calculation methods for surface accuracy evaluation of a mesh geometry.

	Nodal deviation RMS error	Facet gravity center deviation RMS error	Best-fit surface RMS error	Direct RMS error
Computational efficiency	High	High	Low	Low
Nodes placed on the working surface	Not allowed	Required	Required	Not required
Nodes placed off the working surface	Required	Not allowed	Not allowed	Not required
Shallow working surface	Not required	Not required	Required	Not required