9.3 Retrieving Data from the Output File

To retrieve data saved using GBTIDL, it is possible to open the file as an input file and use the get and getrec commands. The following example illustrates.

getnod, 101             ; Get a spectrum from a previously defined input file
fileout, 'mydata.fits'  ; Set the output file name
keep                    ; Store the spectrum in record 0 of the keep file     
getnod, 103             ; Get more data
keep                    ; Store the next spectrum in record 1                 
fileout, 'KEEP.fits'    ; Close mydata.fits and open a new output file 
filein, 'mydata.fits'   ; Reopen mydata.fits it as an input file
getrec, 0               ; Retrieve the first entry

Alternatively, data can be retrieved directly from the output file using kgetrec or kget.

getnod, 101             ; Get a spectrum from a previously defined input file
fileout, 'mydata.fits'  ; Set the output file name
keep                    ; Store the spectrum in record 0 of the keep file     
getnod, 103             ; Get more data
keep                    ; Store the next spectrum in record 1                 
kget, scan=101          ; Retrieves scan 101 from the output data file and places it in the PDC

The kget command uses the same selection parameters as the get procedure.