[evlatests] Antenna 16 Q-band total power

[Ken Sowinski]

> On 12/8/05 16:17, Walter Brisken wrote:
> > At peak, the total power detector 
> > reported -28.63dB.  Comparing to the off-source value of -29.69dB 
> > suggests that Venus added 27% to Tsys.  This offset explains Ken's 
> > non-fringes.  Is anyone prepared to say if this is reasonable?
> 
> i can comment on the Tsys value.  expected increase in Tsys from venus at 43 GHz 
> is ~40 K (assuming 35% efficiency).  if this added 27% to Tsys, then without 
> venus Tsys was ~150 K, which is pretty high for Q-band.  so either Tsys looks 
> high, or the efficiency is much lower than 35%.
> 
> 	-bryan

Or the detectors are not well calibrated.

Ken