diff --git a/NumericalData/AMDA/MAVEN/SEP/mav-sep1-anc.xml b/NumericalData/AMDA/MAVEN/SEP/mav-sep1-anc.xml
index 7cf35d8..8aeafd2 100644
--- a/NumericalData/AMDA/MAVEN/SEP/mav-sep1-anc.xml
+++ b/NumericalData/AMDA/MAVEN/SEP/mav-sep1-anc.xml
@@ -356,7 +356,7 @@
        </Parameter>
       <Parameter>
          <Name>mars :fraction sky</Name>
-         <ParameterKey>mav_sep1_rsky</ParameterKey>
+         <ParameterKey>mav_sep1_mars</ParameterKey>
          <Description>Fraction of the sky filled by the disk of Mars</Description>
          <Ucd/>
          <Units/>
diff --git a/NumericalData/AMDA/MAVEN/SEP/mav-sep2-anc.xml b/NumericalData/AMDA/MAVEN/SEP/mav-sep2-anc.xml
index b064c03..ee40077 100644
--- a/NumericalData/AMDA/MAVEN/SEP/mav-sep2-anc.xml
+++ b/NumericalData/AMDA/MAVEN/SEP/mav-sep2-anc.xml
@@ -356,7 +356,7 @@
        </Parameter>
       <Parameter>
          <Name>mars :fraction sky</Name>
-         <ParameterKey>mav_sep2_rsky</ParameterKey>
+         <ParameterKey>mav_sep2_mars</ParameterKey>
          <Description>Fraction of the sky filled by the disk of Mars</Description>
          <Ucd/>
          <Units/>
--
libgit2 0.21.2