In order to coalign the NoRH image with those obtained by
the other instruments, it is convinient to use the map procedures
made by Dr. D. Zarro (for detailed information, see
http://orpheus.nascom.nasa.gov/~zarro/idl/maps.html.
The map of the NoRH image can be made as follows:
IDL> norh_index2map,index,data,map 
CR
IDL> plot_map,map CR