Add warning message for UV rad. calibration

metis_l2_prep_uv.pro

@@ -166,6 +166,7 @@ pro metis_l2_prep_uv
 
 	; update the comment and history keywords
 
+	fxaddpar, primary_header, 'COMMENT', 'WARNING: UV radiometric calibration is still preliminary.'
 	fxaddpar, primary_header, 'COMMENT', 'Uncertainty matrix in the FITS extension is preliminary.'
 
 	for k = 0, n_elements(history) - 1 do $