When the sken was observed you can get its map in alfa, delta coordinates at once. Especially it is recommended (necessary) to make the amplitude calibrator map at the beginning of observations to check the whole observing system.
Log at the computer called chef at Effelsberg (at the left when you enter the operation room)
ask the operator
create the directory for your project (here the project No was 122/00)
cp ed6* ket6* tab6* para[1-2]* ~122_00
copy necessary files to your directory
ed6dbcal run the program
1020 scan number of the amplitude calibrator, e.q. 1020
-0 start coordinates, must be minus before 0: OAZM from 6caldh.obs file, here 0o
18 extent of the map in AZ (arcmin) (see 6caldh.obs)
18 extent of the map in ELEV (arcmin)
Check gain factors:
After ed6dbcal run, mp, df and GS files will be created. The numbers from GS* file (8 parameters close to 1.0 from fitting a gauss to the observation of the calibrator) should be the same (up to 5%) as the ones in ket6dbcal.master.new (calles by ed6dbcal). If not put the numbers from GS* file to ket6dbcal.master.new and ket6db.master.new . Big discrepancies (>10%) means some problems: call the operator.
Check percentage of polarization:
at the bottom of GS-file (Prozent):
3c286: ~12; 3c138: ~12
Check polarization angle (Winkel):
3c286: ~34; 3c138: ~-11
If the numbers are not so as expected call the operator, otherwise you can lost all your observing time.
ed6db run the program
1022 scan number of the target
24 OAZM from observing file, e.q. ic2574.obs
25 extent of the map in AZ (see ic2574.obs file)
25 extent of the map in ELEV