diff --git a/conf/airframes/minimag1.xml b/conf/airframes/minimag1.xml
index 96a33e89a1..7571a3ca61 100644
--- a/conf/airframes/minimag1.xml
+++ b/conf/airframes/minimag1.xml
@@ -51,7 +51,6 @@
     <define name="MAX_PITCH" value="0.6"/>
   </section>
 
-<!-- Serial n°0637446 . ADC_CHANNEL n°2,3 et 7 HS -->
   <section name="adc" prefix="ADC_CHANNEL_">
     <define name="IR1" value="ADC_0"/>
     <define name="IR2" value="ADC_1"/>
@@ -62,17 +61,13 @@
   <section name="INFRARED" prefix="IR_">
     <define name="ROLL_NEUTRAL_DEFAULT" value="-6" unit="deg"/>
     <define name="PITCH_NEUTRAL_DEFAULT" value="12" unit="deg"/>
-    <define name="DEFAULT_CONTRAST" value="200"/>
     <define name="RAD_OF_IR_CONTRAST" value="0.75"/>
+
     <linear name="RollOfIrs" arity="2" coeff1="0.7" coeff2="0.7"/>
     <linear name="PitchOfIrs" arity="2" coeff1="-0.7" coeff2="0.7"/>
-
     <linear name="TopOfIr" arity="1" coeff1="1"/>
-    <define name="RAD_OF_IR_MAX_VALUE" value="0.0045"/>
-    <define name="RAD_OF_IR_MIN_VALUE" value="0.00075"/>
     <define name="ADC_ROLL_NEUTRAL" value="716"/>
     <define name="ADC_PITCH_NEUTRAL" value="0"/>
-
     <define name="ADC_TOP_NEUTRAL" value="512"/>
 
     <define name="CORRECTION_UP" value="1."/>