diff --git a/mission/controller/AcsController.cpp b/mission/controller/AcsController.cpp
index f9a04c46..d3bbfcd8 100644
--- a/mission/controller/AcsController.cpp
+++ b/mission/controller/AcsController.cpp
@@ -180,7 +180,8 @@ void AcsController::performAttitudeControl() {
       mode, &susDataProcessed, &mgmDataProcessed, &gyrDataProcessed, &sensorValues,
       &attitudeEstimationData, timeDelta, &fusedRotRateSourcesData, &fusedRotRateData);
   result = navigation.useMekf(&sensorValues, &gyrDataProcessed, &mgmDataProcessed,
-                              &susDataProcessed, timeDelta, &attitudeEstimationData);
+                              &susDataProcessed, timeDelta, &attitudeEstimationData,
+                              acsParameters.kalmanFilterParameters.allowStr);
 
   if (result != MultiplicativeKalmanFilter::MEKF_RUNNING and
       result != MultiplicativeKalmanFilter::MEKF_INITIALIZED) {
diff --git a/mission/controller/acs/AcsParameters.cpp b/mission/controller/acs/AcsParameters.cpp
index f8fb759b..3a7aa726 100644
--- a/mission/controller/acs/AcsParameters.cpp
+++ b/mission/controller/acs/AcsParameters.cpp
@@ -734,6 +734,9 @@ ReturnValue_t AcsParameters::getParameter(uint8_t domainId, uint8_t parameterId,
         case 0x5:
           parameterWrapper->set(kalmanFilterParameters.sensorNoiseGyrBs);
           break;
+        case 0x6:
+          parameterWrapper->set(kalmanFilterParameters.allowStr);
+          break;
         default:
           return INVALID_IDENTIFIER_ID;
       }
diff --git a/mission/controller/acs/AcsParameters.h b/mission/controller/acs/AcsParameters.h
index 467c0740..965878e7 100644
--- a/mission/controller/acs/AcsParameters.h
+++ b/mission/controller/acs/AcsParameters.h
@@ -947,6 +947,8 @@ class AcsParameters : public HasParametersIF {
 
     double sensorNoiseGyrArw = 3. * 0.0043 / sqrt(10) * DEG2RAD;  // Angular Random Walk
     double sensorNoiseGyrBs = 3. / 3600. * DEG2RAD;               // Bias Stability
+
+    uint8_t allowStr = false;
   } kalmanFilterParameters;
 
   struct MagnetorquerParameter {
diff --git a/mission/controller/acs/MultiplicativeKalmanFilter.cpp b/mission/controller/acs/MultiplicativeKalmanFilter.cpp
index 5dce2a84..b66f0531 100644
--- a/mission/controller/acs/MultiplicativeKalmanFilter.cpp
+++ b/mission/controller/acs/MultiplicativeKalmanFilter.cpp
@@ -626,11 +626,11 @@ void MultiplicativeKalmanFilter::updateDataSet(
   }
 }
 
-void MultiplicativeKalmanFilter::setStrData(double qX, double qY, double qZ, double qW,
-                                            bool valid) {
+void MultiplicativeKalmanFilter::setStrData(double qX, double qY, double qZ, double qW, bool valid,
+                                            bool allowStr) {
   strData.strQuat.value[0] = qX;
   strData.strQuat.value[1] = qY;
   strData.strQuat.value[2] = qZ;
   strData.strQuat.value[3] = qW;
-  strData.strQuat.valid = valid;
+  strData.strQuat.valid = (valid and allowStr);
 }
diff --git a/mission/controller/acs/MultiplicativeKalmanFilter.h b/mission/controller/acs/MultiplicativeKalmanFilter.h
index 6d475912..d26b6dd8 100644
--- a/mission/controller/acs/MultiplicativeKalmanFilter.h
+++ b/mission/controller/acs/MultiplicativeKalmanFilter.h
@@ -38,7 +38,7 @@ class MultiplicativeKalmanFilter {
   void updateStandardDeviations(const AcsParameters *acsParameters);
 
   void setStrData(const double qX, const double qY, const double qZ, const double qW,
-                  const bool valid);
+                  const bool valid, const bool allowStr);
 
   static constexpr uint8_t IF_MEKF_ID = CLASS_ID::ACS_MEKF;
   static constexpr ReturnValue_t MEKF_UNINITIALIZED = returnvalue::makeCode(IF_MEKF_ID, 2);
diff --git a/mission/controller/acs/Navigation.cpp b/mission/controller/acs/Navigation.cpp
index 038abfdd..113a6ccb 100644
--- a/mission/controller/acs/Navigation.cpp
+++ b/mission/controller/acs/Navigation.cpp
@@ -9,11 +9,12 @@ ReturnValue_t Navigation::useMekf(const ACS::SensorValues *sensorValues,
                                   const acsctrl::MgmDataProcessed *mgmDataProcessed,
                                   const acsctrl::SusDataProcessed *susDataProcessed,
                                   const double timeDelta,
-                                  acsctrl::AttitudeEstimationData *attitudeEstimationData) {
+                                  acsctrl::AttitudeEstimationData *attitudeEstimationData,
+                                  const bool allowStr) {
   multiplicativeKalmanFilter.setStrData(
       sensorValues->strSet.caliQx.value, sensorValues->strSet.caliQy.value,
       sensorValues->strSet.caliQz.value, sensorValues->strSet.caliQw.value,
-      sensorValues->strSet.caliQx.isValid());
+      sensorValues->strSet.caliQx.isValid(), allowStr);
 
   if (mekfStatus == MultiplicativeKalmanFilter::MEKF_UNINITIALIZED) {
     mekfStatus = multiplicativeKalmanFilter.init(susDataProcessed, mgmDataProcessed,
diff --git a/mission/controller/acs/Navigation.h b/mission/controller/acs/Navigation.h
index b944073d..230ce79e 100644
--- a/mission/controller/acs/Navigation.h
+++ b/mission/controller/acs/Navigation.h
@@ -17,7 +17,8 @@ class Navigation {
                         const acsctrl::GyrDataProcessed *gyrDataProcessed,
                         const acsctrl::MgmDataProcessed *mgmDataProcessed,
                         const acsctrl::SusDataProcessed *susDataProcessed, const double timeDelta,
-                        acsctrl::AttitudeEstimationData *attitudeEstimationData);
+                        acsctrl::AttitudeEstimationData *attitudeEstimationData,
+                        const bool allowStr);
   void resetMekf(acsctrl::AttitudeEstimationData *mekfData);
 
   ReturnValue_t useSpg4(timeval now, acsctrl::GpsDataProcessed *gpsDataProcessed);