Up: Computational Methods
The actual transformation of raw detector data to clean maps in intensity
scale depends strongly on both the imaging and detecting systems.
However, three typical steps can be identified, namely: detection and
removal artifacts in the data, correction for non-linear effects
or relative variations in sensitivity of the detector system, and correction
for geometric distortions in the imaging device.
Although the order of the first two steps can often be interchanged
the geometric correction must be performed last because it involves
a rebinning of the data which assumes them to be intensities.
Raw to Calibrated Data