Adjust modis2airs.py for 1-based indexing

modis2airs.py

@@ -63,8 +63,8 @@ for airs_row in range(135):
             rads_sum[:] = 0.0
             rads_squared_sum[:] = 0.0
             continue
-        along_idxs = modis_along_idxs[airs_row,airs_col,:num]
-        across_idxs = modis_across_idxs[airs_row,airs_col,:num]
+        along_idxs = modis_along_idxs[airs_row,airs_col,:num] - 1
+        across_idxs = modis_across_idxs[airs_row,airs_col,:num] - 1
         rads = in_rads[:,along_idxs,across_idxs]
 
         # if there's any invalid data amongst the collocated MODIS