This IDL program is an implementation to run the Astrometry.net pipeline as part of your other IDL routines. It also adds the possibility to specify a time limit to each file for which an astrometric solution is searched for, which is very handy for the reduction of large data sets.
See the file astrometrynet_manual.pdf for detailed informations on how to install the Astrometry.net package (which is not provided where) on your system. A french version of the manual is also available.
See the header of astrometrynet.pro for detailed informations on how to use this IDL routine.