Small test update to keep in line with dynamic column generation.

plio/examples/SocetGXP/InSightE08_XW.csv

-point_id,stat,known,lat_Y_North,long_X_East,ht,sigma0,sigma1,sigma2,res0,res1,res2
+point_id,stat,known,lat_Y_North,long_X_East,ht,sig0,sig1,sig2,res0,res1,res2
 1,1,1,0.08538133869186999,2.38013146162178,-2697.2374469465,0.0,0.0,1.707214,16.348041000000002,-13.917623,-0.151001
 2,1,1,0.08508542650082002,2.3808135855714703,-2702.0,0.0,0.0,1.0,15.983285999999998,-16.869508,0.103341
 3,1,1,0.08626480095809,2.3870838392611,-2714.16003756809,0.0,0.0,3.828854,12.831839,-34.360639,-2.2058459999999998

plio/io/io_bae.py

@@ -257,7 +257,7 @@ def save_gpf(df, output_file):
         #Output coordinates to gpf file
         outGPF.write('{0} {1} {2}\n'.format(row['point_id'], row['stat'], row['known']))
         outGPF.write('{0}         {1}         {2}\n'.format(row['lat_Y_North'], row['long_X_East'], row['ht']))
-        outGPF.write('{0} {1} {2}\n'.format(row['sigma0'], row['sigma1'], row['sigma2']))
+        outGPF.write('{0} {1} {2}\n'.format(row['sig0'], row['sig1'], row['sig2']))
         outGPF.write('{0} {1} {2}\n\n'.format(row['res0'], row['res1'], row['res2']))
 
     outGPF.close()