SUBROUTINE  : FFCORR(JPL,SVEC,ZNOM,VXYZ,DEVT0,BZ,DCORR)
 
AUTHOR : Stephen Burke
 
DATE : 28/10/94
 
LANGUAGE : FORTRAN
 
SHORT SUMMARY of PURPOSE:                                                
                                                                                
 Calculate the drift corrections for track angle, time-of-flight,               
 signal propagation time and magnetic field variation.                          
                                                                                
LIST and DESCRIPTION of INPUT VARIABLES/ARGUMENTS:                       
                                                                                
 JPL   - z plane number (1 to 72)                                               
 SVEC  - state vector at plane JPL (REAL*8)                                     
 ZNOM  - nominal z vertex                                                       
 VXYZ  - event vertex position (3-vector)                                       
 DEVT0 - event T0 correction                                                    
 BZ    - the z component of the field                                           
                                                                                
 FPLC/FRLC banks (unpacked hits)                                                
                                                                                
 Information in various Kalman filter common blocks                             
                                                                                
 Various parameters are hardwired                                               
                                                                                
LIST and DESCRIPTION of OUTPUT VARIABLES/ARGUMENTS:                      
                                                                                
 DCORR - total correction to the drift distance                                 
                                                                                
 
CALLING TREE from FFCORR :
 
None
 
FUNCTIONS USED :
 
None
 
KEEP SEQUENCES USED :
 
 FKNPL FKCONS FKPROJ FKSMTH FKRSID FKTRUE FKMEAS FFSTEE FFGEO                                                 
 FFDBG FKDBG FKINT FRLORA BCS CNSTBF FTANG STFUNCT STFCLW FTFUNCT                                             
                                                                                                              
 

 
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