radec [-hh | -hms]

  read a series of coordinate pairs and convert between decimal and
  sexigesimal representations.  If the option -hh is given, the input
  is expected to be decimal degrees and the output will be sexigesimal
  (hours minutes seconds).  If the option -hms is given, the input is
  expected to be sexigesimal and the output will be decimal degree.
  Whitespace must be used for all separators.