[evlatests] C and X band SDM1 data

[Steven T. Myers]

In addition to ea28, ea09, ea24, and ea25 also have zero amplitude in subband 1 
for intervals in that same scan 22:32:42.0 - 22:34:06.9 (but at different times 
during that scan).

On Wed, 14 Oct 2009, Rick Perley wrote:

>    A)  X-Band.   There are four subbands, with dual polarization.  The
> FQ table looks correct.  The data quality looks excellent, with a single
> exception:  In sub-band 1 only, in both polarizations, there are two
> short periods where antenna 28 produced exact zeros.  Since noise can't
> do this, this is an 'absence of data' issue.  All channels are zeroed.