[mmaimcal]Re: [Almacal] memo 372 review reply - gurwell

[Larry D'Addario]

Mark Gurwell writes:
 > ...Only with a 
 > knowledge of the SBR can one accurately use the measured system
 > temperature (which is inherently a DSB operation) to get the single
 > sideband system temperature which is the first order correction
 > to amplitude.

The point is that you don't need the "measured system temperature" at
all, but rather just the gain.  If you know the gain in the desired
sideband, then you don't care what the gain is in the undersired
sideband.  Using interferometric calibration with sideband
suppression, you obtain directly the gain in the desired sideband.

Your method is traditional for single dish telescopes, where the
desired sideband gain must be inferred indirectly from separate
measurements of the DSB gain and the gain ratio.

--Larry