keckobservatory/lris_focus_gui

Automatic spectroscopy focus for LRIS

LRIS_Focus_GUI

To start:

login as lriseng@vm-k1guiserver

cd LRIS_Focus_GUI

~lriseng/anaconda3/bin/python LRIS_Spec_Focus.py

lris_focus_gui's Issues

Replace the calls to modify with KTL

The current version of the code uses popen to call modify. This is because there is no vm that has access to KTL.

As soon as vm-lris is completely installed and has KTL and python3, we can switch to KTL calls.

Focus GUI Should close trap door

The new focus GUI will leave the trap door open (and thus the arc lamps off) if it is open when the focus GUI is started. This is a common situation if the observer has just done an imaging focus.

Script does not reset readout speed

According to my observers, the focus script leaves the red CCD in FAST readout mode.

Parameters are not editable

The six parameters in the upper left corner of the UI window (center position, step size, and number of steps for red and blue respectively) do not appear to be editable by the user.

If we do enable that, it would be good to put in some sort of message about the edge of the blue focus range since observers are likely to try to set a range which exceeds the blue focus stage's ability at some point.

Cloud of Points in Graph is Hard to Interpret

The current display which shows the image quality as a function of focus position is hard to interpret because each horizontal cut through the image results in a point on the graph, so there is a solid vertical column of points for each focus position. This make the focus look "soft" (according to my observer tonight :) ).

We should find a better way to display this to make it easier for a human to interpret and thus have confidence in the result. Perhaps doing a mean and stddev at each focus value and showing a single point and error bar. Alternatively plotting with alpha <<1, so that a large number of points will show up as a darker area and areas with few points will be faint and deemphasized.

Filename prefix is not reset after focus run

The script does not reset the filename prefix after a focus run. It remains bfoc_.

Script does not reset binning

Observers tonight reported that the script did not reset the binning values after completion.

GUI Crashes on Analyze Data

The GUI dies without error message when analyzing certain data.

Example: /s/sdata243/lris7/2020jan21/rfoc_0002.fits to rfoc_0008.fits