" Detector Coordinates" or " Galactic Coordinates"
.
If a Title value has not been set for a Frame, then a suitable default is supplied, depending on the class of the Frame.
"
n-d
coordinate system" , where n
is the number of Frame axes (Naxes attribute).  "
n-d
                                                                                       
                                                                                       
compound coordinate system" , where
n
is the number of CmpFrame axes (Naxes attribute).  A Frame’ s Title is intended purely for interpretation by human readers and not by
software.