|
Step 3: Measuring camera download times This step can be easily performed with the help of a stopwatch: just take several images with your CCD camera, note the time it takes for the camera to download each image, and compute the average download time. If you intend to use your CCD camera at different resolutions, you should determine average download times for each binning factor. Here we will refer to full resolution (unbinned) images as high resolution, to 2 x 2 binned images as medium resolution, and to 3 x 3 binned images as low resolution. Users of large-format chips sometimes take subframes when they don't need to use the full field-of-view. The MU image acquisition script included with TAO implements the option of taking center subframes, which are Nx/2 x Ny/2 pixels in size (where the full detector is Nx x Ny pixels) and whose centers coincide with the center of the full detector. If one intends to use these center subframes, their average download times should also be measured for each camera resolution one intends to use.
Previous: Preparing files containing slew time models |