;
;  define file handling variables  
;  define data structure definition parameters
;
;       Data definition 
;
defsysv, '!nchan', 0L        ; number of data channels in a single spectrum from SDFITS 
defsysv, '!data_points', 0L  ;  same as above
defsysv, '!kount', 0L        ; number of data records in database from SDFITS
defsysv, '!kon', 0L          ; number of data records in ONLINE data file
defsysv, '!koff', 0L         ; number of data records in OFFLINE data file
;
;       I/O variables
;
;defsysv, '!datafile',  '../data/dec03.avg.acs.fits';  <== IDL data file name
defsysv, '!datafile',  '../data/feb04.avg.acs.fits';  <== IDL data file name
defsysv, '!online_data', '../data/online.gbt'   ; <== ONLINE data file name
defsysv, '!offline_data', '../data/offline.gbt' ; <== OFFLINE data file name
defsysv, '!nsavefile', '../data/nsave.dat'      ;      nsave file name 
defsysv, '!nslogfile', '../data/nsave.log'      ;      nsave log file 
defsysv, '!plot_file', '../figs/idl.ps'         ;  default plot file
defsysv, '!jrnl_file', '../saves/journal.dat'   ;  JOURNAL file
defsysv, '!save_idl_state', '../saves/state.dat';  file with vars + !vars
defsysv, '!save_idl_procs', '../saves/procs.dat';  file with *.pro  
;
defsysv, '!dataunit', 0 & defsysv, '!nsunit', 0 &       ;  logical unit numbers
defsysv, '!nslogunit', 0                                ;   "       "      " 
defsysv, '!offunit', 0  & defsysv, '!onunit', 0 &       ;   "       "      "
defsysv, '!nsave', 0       ;  current position of nsave record pointer
defsysv, '!nsave_max', 1024 ;  maximum # records in nsave file  
defsysv, '!nsave_log', intarr(!nsave_max) ; keep track if this slot has been written to 
;
;   Get LUNs for files 
;
get_lun,lun                        ;    assign lun nsave file
!nsunit=lun                        ;    we keep this lun throughout 
get_lun,lun
!nslogunit=lun                     ;    nslog file lun
get_lun,lun
!onunit=lun                        ;    ONLINE data file unit
get_lun,lun
!offunit=lun                       ;    OFFLINE data file unit
;