[evlatests] System Temperature

[George Moellenbrock]

>     All data at K-band (both VLA and EVLA) were so weak as to
> be unusable.  3C147 is a 1.8 Jy object at these frequencies -- we should
> have gotten useable data.  It's as if the antennas were pointed somewhere
> else ...

<<clipped>>

>     A mystery to me is the values of Tsys for the VLA antennas
> at K-band -- all values are around 120.  Yet they should be in the
> 40s or 50s, like antenna 14.  Can the Tcals be off by a factor of 3? 
> 

Aren't these two paragraphs consistent with each other, and with the Tsys
really being too high?  Maybe 120K isn't (or shouldn't be) high enough to
explain such difficulty with a 2 Jy source, but high Tsys and low
correlation makes sense.

-George



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