Extract Angle Cam Image from CODA files

SHMS and HMS Angle Cam Images in CODA files

The angle camera images are stored at the start of every CODA run. They can be extracted using the /home/coda/coda/scripts/Angle_snapshots/get_coda_photos tool.

This script uses evio2xml to support extracting the image so you will need to run it in a place that has access to the coda tools. There are lots of ways to do this, but the simplest is to just login to cdaq@cdaql1.

Login to the cdaq cluster, cd into an appropriate directory, and make a symlink of the script here:

 % ln -s /home/coda/coda/scripts/Angle_snapshots/get_coda_photos .

Or copy the script if you want:

 % cp /home/coda/coda/scripts/Angle_snapshots/get_coda_photos .

The basic syntax is "./get_coda_photos <coda_file.dat>". It will extract the angle-cam images into your current working directory. For example:

 ./get_coda_photos  /cache/hallc/spring17/raw/coin_all_07977.dat

Generates:

 SHMS_angle_07977.jpg, and
  HMS_angle_07977.jpg

If you are in a directory with symlinks to raw/, cache/, etc, then you can just give it the filename and it will search the usual list of paths automatically like the analyzer does:

 ./get_coda_photos coin_all_07977.dat