diff --git a/NumericalData/AMDA/Ephemerides/mercury-orb-all.xml b/NumericalData/AMDA/Ephemerides/mercury-orb-all.xml
index 5437b2a..47ea85b 100644
--- a/NumericalData/AMDA/Ephemerides/mercury-orb-all.xml
+++ b/NumericalData/AMDA/Ephemerides/mercury-orb-all.xml
@@ -6,7 +6,8 @@
         <ResourceHeader>
             <ResourceName>Mercury</ResourceName>
             <ReleaseDate>2015-10-14T11:46:29Z</ReleaseDate>
-            <Description>  * The solar rotation axis is the primary vector: the Z axis points in the solar north direction;  
+            <Description>  Heliocentric Inertial (HCI) Frame : 
+                * The solar rotation axis is the primary vector: the Z axis points in the solar north direction;  
              * The solar ascending node on the ecliptic of J2000 forms the X axis. 
              * The Y axis is Z cross X, completing the right-handed reference frame.
             Heliocentric Earth Ecliptic (HEE) Frame :
diff --git a/NumericalData/AMDA/Ephemerides/venus-orb-all.xml b/NumericalData/AMDA/Ephemerides/venus-orb-all.xml
index c02cfa2..ffb81d0 100644
--- a/NumericalData/AMDA/Ephemerides/venus-orb-all.xml
+++ b/NumericalData/AMDA/Ephemerides/venus-orb-all.xml
@@ -6,7 +6,17 @@
         <ResourceHeader>
             <ResourceName>Venus</ResourceName>
             <ReleaseDate>2015-10-14T11:46:29Z</ReleaseDate>
-            <Description/>
+            <Description>Heliocentric Inertial (HCI) Frame : 
+                * The solar rotation axis is the primary vector: the Z axis points in the solar north direction;  
+             * The solar ascending node on the ecliptic of J2000 forms the X axis. 
+             * The Y axis is Z cross X, completing the right-handed reference frame.
+            Heliocentric Earth Ecliptic (HEE) Frame :
+              * The position of the earth relative to the sun is the primary vector: the X axis points from the sun to the earth.
+              * The northern surface normal to the mean ecliptic of date is the secondary vector: the Z axis is the component of this vector orthogonal to the X axis.
+              * The Y axis is Z cross X, completing the right-handed reference frame.              
+              Solar longitude (Ls) :
+  * The solar longitude Ls is the Planet-Sun angle, measured from the Northern Hemisphere spring equinox where Ls=0.
+Ls=90 thus corresponds to northern summer solstice, just as Ls=180 marks the northern autumn equinox and Ls=270 the northern winter solstice.</Description>
             <Contact>
                 <PersonID>spase://CDPP/Person/NAIF</PersonID>
                 <Role>PrincipalInvestigator</Role>
@@ -108,30 +118,42 @@
             <Support>
                 <SupportQuantity>Positional</SupportQuantity>
             </Support>
-        </Parameter>        
+        </Parameter>
         <Parameter>
-            <Name>longitude IAU_sun</Name>
-            <ParameterKey>venus_sol_lon</ParameterKey>
+            <Name>latitude HCI</Name>
+            <ParameterKey>venus_hci_lat</ParameterKey>
             <Ucd/>
-            <Units>rad</Units> 
-            <Support>
-                <SupportQuantity>Positional</SupportQuantity>
-            </Support>
+            <Units>deg</Units>
         </Parameter>
         <Parameter>
+            <Name>longitude HCI</Name>
+            <ParameterKey>venus_hci_lon</ParameterKey>
+            <Ucd/>
+            <Units>deg</Units>
+        </Parameter> 
+        <Parameter>
             <Name>latitude IAU_sun</Name>
             <ParameterKey>venus_sol_lat</ParameterKey>
             <Ucd/>
-            <Units>rad</Units>
+            <Units>deg</Units>
             <Support>
                 <SupportQuantity>Positional</SupportQuantity>
             </Support>             
         </Parameter> 
         <Parameter>
+            <Name>longitude IAU_sun</Name>
+            <ParameterKey>venus_sol_lon</ParameterKey>
+            <Ucd/>
+            <Units>deg</Units> 
+            <Support>
+                <SupportQuantity>Positional</SupportQuantity>
+            </Support>
+        </Parameter>
+        <Parameter>
             <Name>solar longitude (Ls)</Name>
             <ParameterKey>venus_sol_ls</ParameterKey>
             <Ucd/>
-            <Units>rad</Units> 
+            <Units>deg</Units> 
             <Support>
                 <SupportQuantity>Positional</SupportQuantity>
             </Support>
--
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