Thank you Marshal. I appreciate your help.

The file columns are tab separated. A small sample of the data file is below

<GSOR>    vnir_1 vnir_2 vnir_3 vnir_4 vnir_5    vnir_6 vnir_6 
310015    0.37042    0.36909    0.36886    0.36698    0.36615    0.364
+49    0.36404
310100    0.25889    0.25773    0.2569    0.25563    0.25565    0.2551
+1    0.25508
310134    0.26163    0.26149    0.26059    0.26034    0.2604    0.2598
+    0.26085
310167    0.23168    0.23031    0.23045    0.22822    0.2267    0.2257
+5    0.22453
310196    0.26995    0.26902    0.2685    0.26689    0.26624    0.2647
+    0.26461
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