Subarr LTM and LTV default values changed to accomodate reference fil…

…es with missing info
spacetelescope · Sep 12, 2016 · 18127bb · 18127bb
1 parent 1761c7f
commit 18127bb
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/acstools/utils_subarr.py b/acstools/utils_subarr.py
@@ -216,20 +216,21 @@ def get_lt(hdr):
     -------
     ltm, ltv : tuple of float
         ``(LTM1_1, LTM2_2)`` and ``(LTV1, LTV2)``.
-        Values are `None` if not found.
+        Values are ``(1, 1)`` and ``(0, 0)`` if not found,
+        to accomodate reference files with missing info.
 
     Raises
     ------
     ValueError
         Invalid LTM* values.
 
     """
-    ltm = (hdr.get('LTM1_1'), hdr.get('LTM2_2'))
+    ltm = (hdr.get('LTM1_1', 1.0), hdr.get('LTM2_2', 1.0))
 
     if ltm[0] <= 0 or ltm[1] <= 0:
         raise ValueError('(LTM1_1, LTM2_2) = {0} is invalid'.format(ltm))
 
-    ltv = (hdr.get('LTV1'), hdr.get('LTV2'))
+    ltv = (hdr.get('LTV1', 0.0), hdr.get('LTV2', 0.0))
     return ltm, ltv