Physical units for formatted axis values
"
hh:mm:ss.sss"
) to describe the
character string returned by the AST_FORMAT function when formatting coordinate values. "
km"
). This attribute described the units used when an axis value is formatted into a string using AST_FORMAT. In some cases these units may be different to those used to represent floating point axis values within application code (for instance a SkyFrame always uses radians to represent floating point axis values). The InternalUnit attribute described the units used for floating point values.
When specifying this attribute by name, it should be subscripted with the number of the Frame axis to which it applies.