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Earthshine blog

"Earthshine blog"

A blog about a telescopic system at the Mauna Loa Observatory on Hawaii to determine terrestrial albedo by earthshine observations. Feasible thanks to sheer determination.

Lessons learned.

Control Software Posted on Sep 28, 2011 20:42

Setting the SKE: can only be done from the System_Data_Table – not in a script (the command suggesting that you can do it from a script is not for this purposes).

How to avoid ‘Camera Flatlining’: See the entry under Observing log for JD2455831.

Flat fields

Andor camera field experiences Posted on Sep 28, 2011 20:41

We are examining flat fields – so far they seem to be very peculiar, and time-variable.


Observing log Posted on Sep 28, 2011 19:17

May have learned this important lesson:

The ‘flatlining’ of the CCD camera may be entirely due to the ‘running of two instances of LabView’. This occurs easily, it appears, if you close the VI for imaging while the Engineering Mode (EM) runs – or something like that: the danger is that an instance of Labview is started without you knowing it.
The danger is present when closing VIs. So, to guard against this, have the Task Manager running so that you can see whether you have more than one ‘instance of LabView’ running.

Also, you must have iBoot channel 5 ON when using any of the EM modes for controlling Filter Wheel, front Flap, Rear Flap, Side Flap, underside Flap or any other wonderful device on this telescope!