[mmaimcal] Solar Attenuator

[Mark Holdaway]

Another issue which I have been ignoring, but should not if it
takes 7 seconds cycle time on removing/inserting the solar attenuator:

People observing the sun would probably like to have a fairly continuous
time series.  If we do fast switching, that means that we have data for 
26 seconds
and we miss the sun's dancing for 4 seconds.   With a 7second 
remove/insert, then
we will probably be on the sun for like 22 seconds and off for 8-9 
seconds, resulting in
larger gaps in the solar coverage.

    -Mark