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Helen Burns edited this page Aug 29, 2025 · 5 revisions

height_calculator.py

This tool uses the equations outlined in the calculating heights from pixel height wiki

Tool usage:

If you have already set up an environment like in https://cemac.github.io/DCMEX2/ you can use that environment; otherwise, to set up an environment:

conda env create -f /gws/nopw/j04/dcmex/users/hburns/DCMEX/DCMEX.yml conda activate DCMEX

running the tool with no arguments e.g.

/gws/nopw/j04/dcmex/users/hburns/DCMEX/StandAloneTools/height_calculator.py

will return

Usage: python calculate_heights.py <pixels> <distance in km> <pitch in degrees>"

To obtain the pixel go to /gws/nopw/j04/dcmex/users/hburns/images2/image_pairs/<date>

The images will have the pitch and distance in the image titles and the pixel number can be read off the y-axis as is.

Example use:

/gws/nopw/j04/dcmex/users/hburns/DCMEX/StandAloneTools/height_calculator.py 2500 28 14.05

**NB this calculator uses an assumed height of camera of 1450m asl for the asl value **

Distance_Estimator.py

To set up an environment for the first time:

conda env create -f /gws/nopw/j04/dcmex/users/hburns/DCMEX/DCMEX.yml conda activate DCMEX

In the future, simply activate the already installed environment.

conda activate DCMEX

This script works by providing a file name to the script located:

/gws/nopw/j04/dcmex/users/hburns/DCMEX/StandAloneTools/Distance_Estimator.py <filename>

run the python script e.g.

python /gws/nopw/j04/dcmex/users/hburns/DCMEX/StandAloneTools/Distance_Estimator.py /gws/nopw/j04/dcmex/data/stereocams/2022-07-31/primary_blue/amof-cam-1-2022-07-31-171057-capt0004.jpg

this uses absolute paths but will work with relative paths as well or

  • export DCMEXpth=/gws/nopw/j04/dcmex/users/hburns/DCMEX/
  • export cldimgpth=/gws/nopw/j04/dcmex/data/stereocams/2022-07-31/primary_blue/amof-cam-1-2022-07-31-171057-capt0004.jpg
  • python $DCMEXpth/Distance_Estimator.py $cldimgpth

This will bring up a python plot with the photos nearest associated GOES image with distance rings plotted and an X showing the max optical depth found, if you wish to save the plot save via the python GUI

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