diff --git a/decode/qlook.py b/decode/qlook.py
index f5594ca..854eac0 100644
--- a/decode/qlook.py
+++ b/decode/qlook.py
@@ -207,7 +207,7 @@ def daisy(
                 kwargs={"fill_value": "extrapolate"},
             )
         )
-        da_sub = da_on - da_base.values
+        da_sub = da_on - da_base.data
 
         # make continuum series
         weight = get_chan_weight(da_off, method=chan_weight, pwv=pwv)
@@ -429,7 +429,11 @@ def raster(
                 kwargs={"fill_value": "extrapolate"},
             )
         )
-        da_sub = da_on - da_base.values
+        t_atm = da_on.temperature
+        da_sub = t_atm * (da_on - da_base.data)/ (t_atm - da_base.data)
+                                                    
+
+        
 
         # make continuum series
         weight = get_chan_weight(da_off, method=chan_weight, pwv=pwv)