Now POA calculate_spa works without pressure column and POA pyranometer works with no pressure column in POA weather file.

Project file and POA weather files with and without pressure columns in attached zip file
SAM_1367.zip

To test,

1. pull SAM_1367 branch of ssc and patch branches of other repos.
2. open SAM_1367.sam project file
3. Update weather file folders to include location zip file extracted
4. select POA_without_pressure.csv as weather file for POA_without_pressure case
5. select POA_with_pressure.csv as weather file for POA_With_pressure case
6. Shift+F11 to run all cases
7. Compare results
8. Run steps 2 through 7 in current release for comparison.