[evlatests] More on current L-band from yesterday

[Ken Sowinski]

On Wed, 15 Jul 2009, Rick Perley wrote:

>    The 180 degree 'phase hops' are back!  This is the first time (that
> I know of) that these have been found to occur for scans longer than 1
> minute.  Hopping antennas are:  2, 4, 18, 19, and 24.  Non-hoppers are
> 1, 3, 9, and 23.  (As usual, we can't tell which set hops and which does
> not).   Phase hops do not occur on an ~11 minute grid, either.  As
> always, all sub-bands hop by the same amount (180 deg) at the same
> time.  The  time ranges within the hops occurred at:  (uncertainties due
> to off-source observing):

The previous file which showed no phase flips was a 'stop time'
file, this one was in durations.

In this case there were 80 sec scans.  Most of the hops occurs on
alternate scansm i.e., there is a change of state at each scan.