*-- Author :  R. Henderson
      SUBROUTINE FPPDEF
C---------------------------------------------------------------                                              
*KEEP,FPLGEO.                                                                                                 
C---                                                                                                          
C---                                                                                                          
*KEND.                                                                                                        
C                                                                                                             
C---  Define the  vectors ALONG the planar planes                                                             
C                                                                                                             
*