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The PCOT cookbook

This is a repository of useful PCOT documents containing graphs for performing common tasks. If you don't know what PCOT is, please look here for more information. It also contains camera definition files.

Typically, the graphs are saved with some small images as example data. To use your own data, click on the input button at the top of the screen which corresponds to the input you want to replace (this is almost always input 0) and load the required input. You may need to ensure that your data has the bands the graph expects, or edit the graph accordingly.

You will probably have to edit the graph somewhat to produce the analysis you need, but these will give you a starting point from which to do that, as well as providing useful examples.

Analysis recipes and documents

These are (hopefully) the "bread and butter" of working with PCOT: loading data into PCOT to process it in a (more or less) obvious but at least clearly visible way.

Calibration

These are recipes which take raw data and process it into a form ready for analysis. For ExoMars data this will normally happen upstream in the Rover Operations Centre, but that will not be possible in preliminary work - and PCOT may well be used outside that setting.

The calibration pipeline is, roughly speaking, this:

flowchart LR
image[(image)] --> darkfield --> linearise --> flatfield --> Rstar[R*]
For each band in the image:

  • The image has any available darkfield image subtracted from them
  • The image is linearised, so that each pixel's value is proportional to intensity
  • Each pixel is then divided by the corresponding pixel in the normalised flatfield image, giving a radiance image
  • The image is converted from radiance to reflectance (R^{\star}) using a calibration target visible in the image

Calibration data prep. scripts