To run the correlation process on CHTC:
1. Upload data in ./data/CHEESE... folder to your staging folder (I am using flightline03 for testing, you can skip that line)
2. Upload Naip image to your folder on the submit node.
3. Create the chtc arguments using ./script/geo_chtc_arg_text_file_tzr_files.py. Plz modify the code to only generate argument for one flightline (for testing purpose)
4. Modify gcp.sh, gcp.sub accordingly (looking for ##### in the files)
5. Upload gcp.sh, gcp.sub, gcp.py, gcp_args.txt to your folder on the submit node.
6. Submit gcp.sub to condor. Check .log, .err, .out files generated by the job if error occurs.

geo_3_export_green_int.py contains the code to extract the background.
Other codes are for offset processing. I am still testing them. 

For now, plz test on one line for the correlation process. If it works, we can each take several lines and proceed