[evlatests] Temperature-Dependent Gains at P-band...

[Rick Perley]

     In reviewing the data from the lunar polarization experiment, I 
note that some antennas have a very strong temporal variation in their 
gains.  These changes are as large at 75%, are quite slow, and seem 
highly correlated with temperature -- for all the affected antennas, the 
maximum gain occurred at ~6AM, when temperatures were coldest.

     The most strongly affected antennas are:

     ea02 (max/min power ratio = 1.75)

     ea01 (1.50)

     ea24 (1.40)

     ea28 (2.0 -- although the time dependency for this one is not the 
same as the others).

     For all, the rise and fall of the power is gradual.  And for all, 
the switched power values seem to perfectly track the gain changes (as 
they should!).

     Why should these antennas be (apparently) temperature sensitive, 
while the others are not?

     Rick