diff --git a/PARAM_DEF/solo_bls_dsc_da.xml b/PARAM_DEF/solo_bls_dsc_da.xml
new file mode 100644
index 0000000..e461920
--- /dev/null
+++ b/PARAM_DEF/solo_bls_dsc_da.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<param xml:id="solo_bls_dsc_da">
+	<time_resolution>3600</time_resolution>
+	<get>
+		<amdaParam name="so_xyz_hee"/>		 
+	</get>
+	<process>RAD2DEG*acos($so_xyz_hee[0]/sqrt($so_xyz_hee[0]*$so_xyz_hee[0]+$so_xyz_hee[1]*$so_xyz_hee[1]))*Sign($so_xyz_hee[1])</process>
+	<output/>
+</param>
diff --git a/PARAM_DEF/solo_bls_dsc_lag.xml b/PARAM_DEF/solo_bls_dsc_lag.xml
new file mode 100644
index 0000000..2294b0b
--- /dev/null
+++ b/PARAM_DEF/solo_bls_dsc_lag.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<param xml:id="solo_bls_dsc_lag">
+	<time_resolution>3600</time_resolution>
+	<get>
+		<amdaParam name="dsc_vpr"/>
+		<amdaParam name="so_r_sun"/>
+		<amdaParam name="r_earth"/>	
+		<amdaParam name="solo_bls_dsc_da"/>	
+	</get> 
+	<process>($so_r_sun-$r_earth)/$dsc_vpr*1731.46+$solo_bls_dsc_da/14.1844</process>
+	<output/>
+</param>
--
libgit2 0.21.2