[evlatests] Strange differential bandpasses

[rperley]

Certainly is reasonable.  In the case I analyzed, the start of the run 
was around sunrise, the end around noon.  The period of the oscillations 
(and the phase) did not appear to change, however.  The change in 
amplitude was quite obvious.

I don't know if there was rain on the day I looked at -- but perhaps dew 
on the window would do the trick ...

Rick

On 2021-08-27 11:11, Ken Sowinski wrote:
> On Fri, 27 Aug 2021, Rick Perley via evlatests wrote:
> 
>> Drew, et al.:
>> 
>> Perfect!  Period shown in that C-band plot is about 100 MHz, which 
>> corresponds pretty closely to the expected value corresponding to the 
>> length of the horn.  Good evidence for a mismatch between the window 
>> and the OMT….
> 
> The change in the sinusoiid should correlate with temperature.
> Might the reflections have been exacerbated by moisture from
> all the recent rain?
>