+04Mar07=======================================================================
+1. add CTY 1702 prefix data files
+22Feb07=======================================================================
+1. add show/myfdx to Aliases.
+15Feb07=======================================================================
+1. allow convkeps.pl to parse NORAD keps files.
+22Jan07=======================================================================
+1. disable default propagation of PC9x sentences
+2. simplify PC17 handling
+16Jan07=======================================================================