Rosetta Alice Data Calibration Cookbook

1 Create a 2-D Wavelength Image Changes in the resistivity of the detector electronics (primarily due to thermal variations) cause the mapping of a location on the detector in physical space, [x,y], to data space, [X,Y], to vary. This results in an effective change in the dispersion of the data. To correct for this, the detector electronics can produce simulated photon events, known as “stim” pulses, at two known locations in physical space on opposite ends of the detector. The location of the two stim pulses can be used to define a common reference frame