added missing param

mission/controller/acs/AcsParameters.h

@@ -875,6 +875,7 @@ class AcsParameters : public HasParametersIF {
   struct NadirModeControllerParameters : PointingLawParameters {
     double refDirection[3] = {-1, 0, 0};  // Antenna
     double quatRef[4] = {0, 0, 0, 1};
+    double refRotRate[3] = {0, 0, 0};
     int8_t timeElapsedMax = 10;  // rot rate calculations
   } nadirModeControllerParameters;