Sample Filter Scan

Here is a sample scan of the 7.9 micron filter over our (pot-limited) range of echelle motion. It's collected using the 'strip chart' mode of the photometry boxes in Justin's GUI, and the resulting graph is measured via the GIMP to get start/end points for the orders:

The values across the top give the pot voltage and corresponding angle for the rough center of each order.

The green line is the mean over a rectangular box oriented vertically, quasi-parallel to the echelon orders.  Blue is a similar box rotated 90 degrees, across the orders.

The echelle is rotating slowly as the strip chart is collected, at about 1.5 degrees/minute.  The central decker is set across the flux slit to create narrow orders, though they overlap from time to time.

This is meant to provide an overview of the filter profiles.  We'll need to use the measured central order positions to go back and obtain representative frames at each order, determine appropriate slit lengths, etc. I'm collecting the scans and the GIMPed measurements in a spreadsheet....any suggestions are welcome.