fix header bug

ObservationSim/Config/Header/ImageHeader.py

@@ -273,7 +273,7 @@ def generatePrimaryHeader(xlen = 9216, ylen = 9232, pointNum = '1', ra = 60, dec
     h_prim['EXPTIME'] = exptime
     
     # Define file types
-    file_type = {'MS':'sci', 'BIAS':'zero', 'DARK':'dark', 'FLAT':'flat', 'CRS':'cosmic_ray', 'CRD':'cosmic_ray'}
+    file_type = {'SCI':'sci', 'BIAS':'zero', 'DARK':'dark', 'FLAT':'flat', 'CRS':'cosmic_ray', 'CRD':'cosmic_ray'}
     h_prim['FILETYPE'] = file_type[im_type]
 
     co = coord.SkyCoord(ra, dec, unit='deg')