diff --git a/docs/source/Support/bskKnownIssues.rst b/docs/source/Support/bskKnownIssues.rst
index 311b0da7f4..c24e85f797 100644
--- a/docs/source/Support/bskKnownIssues.rst
+++ b/docs/source/Support/bskKnownIssues.rst
@@ -17,6 +17,8 @@ Version |release|
   install script is updated this is corrected in the current release.
 - We found a slow memory leak if messages with arrays or vectors were accessed from python.  The ``swig``
   issue has now been fixed in the current release.
+- The :ref:`facetSRPDynamicEffector` module was double counting a cosine term in the SRP force calculation. This is
+  corrected in the current release.
 
 Version 2.2.0
 -------------
diff --git a/src/simulation/dynamics/facetSRPDynamicEffector/_UnitTest/test_unitFacetSRPDynamicEffector.py b/src/simulation/dynamics/facetSRPDynamicEffector/_UnitTest/test_unitFacetSRPDynamicEffector.py
index b6eb725f05..ddc2cb435a 100644
--- a/src/simulation/dynamics/facetSRPDynamicEffector/_UnitTest/test_unitFacetSRPDynamicEffector.py
+++ b/src/simulation/dynamics/facetSRPDynamicEffector/_UnitTest/test_unitFacetSRPDynamicEffector.py
@@ -107,12 +107,9 @@ def checkFacetSRPForce(index, area, specCoeff, diffCoeff, normal_B, sigma_BN, sc
 
     # Calculate the incidence angle theta between the facet normal vector and the Sun-direction vector
     cosTheta = np.dot(sHat, normal_B)
-    intermediate = np.cross(sHat, normal_B)
-    sinTheta = np.linalg.norm(intermediate)
-    theta = np.arctan2(sinTheta, cosTheta)
 
     # Calculate the facet projected area onto the plane whose normal vector is the Sun-direction vector
-    projArea = area * np.cos(theta)
+    projArea = area * cosTheta
 
     # Calculate the solar radiation pressure acting on the facet
     numAU = AstU / np.linalg.norm(r_SB_B)
@@ -120,7 +117,7 @@ def checkFacetSRPForce(index, area, specCoeff, diffCoeff, normal_B, sigma_BN, sc
 
     # Compute the SRP force acting on the facet only if the facet is illuminated by the Sun
     if projArea > 0:
-        srp_force = -SRPPressure * projArea * np.cos(theta) * ( (1-specCoeff) * sHat + 2 * ( (diffCoeff / 3) + specCoeff * np.cos(theta)) * normal_B )
+        srp_force = -SRPPressure * projArea * ( (1-specCoeff) * sHat + 2 * ( (diffCoeff / 3) + specCoeff * cosTheta) * normal_B )
     else:
         srp_force = np.zeros([3,])
 
@@ -146,12 +143,9 @@ def checkFacetSRPTorque(index, area, specCoeff, diffCoeff, normal_B, locationPnt
 
     # Calculate the incidence angle theta between the facet normal vector and the Sun-direction vector
     cosTheta = np.dot(sHat, normal_B)
-    intermediate = np.cross(sHat, normal_B)
-    sinTheta = np.linalg.norm(intermediate)
-    theta = np.arctan2(sinTheta, cosTheta)
 
     # Calculate the facet projected area onto the plane whose normal vector is the Sun-direction vector
-    projArea = area * np.cos(theta)
+    projArea = area * cosTheta
 
     # Calculate the solar radiation pressure acting on the facet
     numAU = AstU / np.linalg.norm(r_SB_B)
@@ -159,7 +153,7 @@ def checkFacetSRPTorque(index, area, specCoeff, diffCoeff, normal_B, locationPnt
 
     # Compute the SRP force contribution from the facet only if the facet is illuminated by the Sun
     if projArea > 0:
-        srp_force = -SRPPressure * projArea * np.cos(theta) * ( (1-specCoeff) * sHat + 2 * ( (diffCoeff / 3) + specCoeff * np.cos(theta)) * normal_B )
+        srp_force = -SRPPressure * projArea * ( (1-specCoeff) * sHat + 2 * ( (diffCoeff / 3) + specCoeff * cosTheta) * normal_B )
     else:
         srp_force = np.zeros([3, ])
 
diff --git a/src/simulation/dynamics/facetSRPDynamicEffector/facetSRPDynamicEffector.cpp b/src/simulation/dynamics/facetSRPDynamicEffector/facetSRPDynamicEffector.cpp
index 31eb3f763a..fcc2c5b3f7 100644
--- a/src/simulation/dynamics/facetSRPDynamicEffector/facetSRPDynamicEffector.cpp
+++ b/src/simulation/dynamics/facetSRPDynamicEffector/facetSRPDynamicEffector.cpp
@@ -126,7 +126,7 @@ void FacetSRPDynamicEffector::computeForceTorque(double integTime, double timeSt
 
     // Zero storage information
     double projectedArea = 0.0;
-    double projectionTerm = 0.0;
+    double cosTheta = 0.0;
     facetSRPForcePntB_B.setZero();
     facetSRPTorquePntB_B.setZero();
     totalSRPForcePntB_B.setZero();
@@ -141,22 +141,15 @@ void FacetSRPDynamicEffector::computeForceTorque(double integTime, double timeSt
     // Loop through the facets and calculate the SRP force and torque acting on point B
     for(int i = 0; i < this->numFacets; i++)
     {
-        projectionTerm = this->scGeometry.facetNormals_B[i].dot(sHat);
-        projectedArea = this->scGeometry.facetAreas[i] * projectionTerm;
+        cosTheta = this->scGeometry.facetNormals_B[i].dot(sHat);
+        projectedArea = this->scGeometry.facetAreas[i] * cosTheta;
 
         if(projectedArea > 0.0){
-
-            // Calculate the incidence angle theta between the facet normal vector and the Sun-direction vector
-            double cosTheta = projectionTerm;
-            Eigen::Vector3d intermediate = sHat.cross(this->scGeometry.facetNormals_B[i]);
-            double sinTheta = intermediate.norm();
-            double theta = atan2(sinTheta, cosTheta);
-
             // Compute the SRP force acting on the ith facet
-            facetSRPForcePntB_B = -SRPPressure * projectedArea * cos(theta)
+            facetSRPForcePntB_B = -SRPPressure * projectedArea
                                   * ( (1-this->scGeometry.facetSpecCoeffs[i])
                                   * sHat + 2 * ( (this->scGeometry.facetDiffCoeffs[i] / 3)
-                                  + this->scGeometry.facetSpecCoeffs[i] * cos(theta))
+                                  + this->scGeometry.facetSpecCoeffs[i] * cosTheta)
                                   * this->scGeometry.facetNormals_B[i] );
 
             // Compute the SRP torque acting on the ith facet