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Interferometer pointing

Pointing sources can be observed with the OBS command

    OBS\POINT /ANTENNA Iant /LENGTH 60
in INTERferometry mode if only antenna Iant is to be pointed, or
    OBS\POINT /LENGTH 40
if all antennas must be pointed.

Data reduction can then be done with the CLIC$\backslash$SOLVE POINTING command in CLIC, working on the [OBS.POINTING] directory. Select a set of pointing scans with the CLIC$\backslash$FIND command (use SET PROCEDURE POINT) and process these scans with CLIC$\backslash$SOLVE POINTING [/PLOT] /OUTPUT Date.INT. By default data is appended to that file, add argument NEW after the Date.INT file name to create a new one.

For continuum sources, you should use SET SUB C01 TO C10 and SET AVERAGE METHOD VECTOR. You might want to do an RF_PASSBAND calibration to be able to average both sidebands (SET RF ON, SET BAND AVERAGE); this is absolutely necessary at high frequencies to improve signal to noise ratio. If observing SiO masers at the standard frequency (86.051 USB LOW), use SET SUB C02 and SET BAND UPPER to process the data in CLIC.

Then, use POINT the same way as for the RADIO (single-dish) data.


next up previous contents index
Next: Limited radio pointing determination Up: Radio Pointing Previous: Full sky, single-dish radio   Contents   Index
Gildas manager 2018-10-23