Source Observation

The OBS $\backslash$START command starts a cross-correlation measurement on the source specified by the OBS $\backslash$SOURCE command.

The software allows mosaicing techniques through the use of the OBS $\backslash$OFFSET command. A mosaic is done using SIC procedures:

     SIC\FOR I -40 TO 40 BY 40
     SIC\FOR J -40 TO 40 BY 40
     OBS\OFFSET I J/BASIS
     OBS\START
     SIC\NEXT
     SIC\NEXT

The OBS $\backslash$OFFSET command defines antenna and delay tracking offsets as appropriate for mosaicing using the GILDAS task MAKE_MOSAIC and the MAPPING program.

Since integration time may be low in mosaicing, dead time should be reduced as much as possible. The present implementation is not optimised in this respect and a faster scheme should be investigated later.