diff --git a/src/common/getMeasurementMetaData.cpp b/src/common/getMeasurementMetaData.cpp
index 14eb13a..93a5747 100644
--- a/src/common/getMeasurementMetaData.cpp
+++ b/src/common/getMeasurementMetaData.cpp
@@ -125,6 +125,29 @@ TransFormInfo Recon::getTransformationMatrix(Parser* aParser, const Matrix& aMot
     return result;
 }
 
+Matrix Recon::temperatureToSoundSpeed(const Matrix& aTemperature, const std::string& aMethod)
+{
+    Matrix result;
+    if (aMethod == "marczak")
+    {
+        double* kData = new double[6] {2.78786e-9, -1.398845e-6, 3.287156e-4, -5.799136e-2, 5.038813, 1.402385e3};
+        Matrix k = Matrix::fromRawData(kData, 6);
+        result = polyval(k, aTemperature);
+    }
+    else if(aMethod == "mader")
+    {
+        double* kData = new double[6] {3.14643e-9, -1.478e-6, 0.000334199, -0.0580852, 5.03711, 1402.39};
+        Matrix k = Matrix::fromRawData(kData, 6);
+        result = polyval(k, aTemperature);
+    }
+    else if(aMethod == "jan")
+    {
+        double speedData = 1557 - 0.0245 * pow((74 - aTemperature.getData()[0]), 2);
+        result = Matrix::fromRawData(new double[1] {speedData}, 1);
+    }
+    return result;
+}
+
 //已验证，完全正确
 TempInfo Recon::getTemperatureInfo(Parser* aParser, double aNumTas)
 {
@@ -200,13 +223,13 @@ TempInfo Recon::getTemperatureInfo(Parser* aParser, double aNumTas)
             // temp.TASTemperature(1, :, :) = correctTASTemperatures(temp2, temp.jumoTemp);
 
             //         catch ME
-                
+
             //     % if tas temperatures not there
             //     % take temperatures from calibrated sensors
             //     % and use them for all TAS the same
-                
+
             //     writeReconstructionLog(sprintf('%s: %s TAS temperatures approximated from calibrated reference sensors.', ME.identifier, ME.message), 3)
-                
+
             //     if(~jumoAllNaN)
             //         temp.TASTemperature = zeros(2, numTAS, size(temp.jumoTemp, 2));
             //         temp.TASTemperature(1, :, :) = repmat(mean(temp.jumoTemp), size(temp.TASTemperature, 2), 1);
@@ -214,7 +237,7 @@ TempInfo Recon::getTemperatureInfo(Parser* aParser, double aNumTas)
             //     else % worst case: no temperature data at all! cannot continue!
             //         error([mfilename ':noTemperatureAvailable'],'No TAS and no Jumo temperature available! Cannot reconstruct!');
             //     end
-                
+
             // end
         }
     }
@@ -228,25 +251,7 @@ TempInfo Recon::getTemperatureInfo(Parser* aParser, double aNumTas)
     {
         result.expectedTemp = mean(result.jumoTemp,FunctionDirection::All,false);
     }
-
-    std::string speedMethod = "marczak";
-    if (speedMethod == "marczak")
-    {
-        double* kData = new double[6] {2.78786e-9, -1.398845e-6, 3.287156e-4, -5.799136e-2, 5.038813, 1.402385e3};
-        Matrix k = Matrix::fromRawData(kData, 6);
-        result.expectedSOSWater = polyval(k, result.expectedTemp);
-    }
-    else if(speedMethod == "mader")
-    {
-        double* kData = new double[6] {3.14643e-9, -1.478e-6, 0.000334199, -0.0580852, 5.03711, 1402.39};
-        Matrix k = Matrix::fromRawData(kData, 6);
-        result.expectedSOSWater = polyval(k, result.expectedTemp);
-    }
-    else if(speedMethod == "jan")
-    {
-        double speedData = 1557 - 0.0245 * pow((74 - result.expectedTemp.getData()[0]), 2);
-        result.expectedSOSWater = Matrix::fromRawData(new double[1] {speedData}, 1);
-    }
+    result.expectedSOSWater = temperatureToSoundSpeed(result.expectedTemp , "marczak");
 
     return result;
 }
diff --git a/src/common/getMeasurementMetaData.h b/src/common/getMeasurementMetaData.h
index 18369c9..bf137f9 100644
--- a/src/common/getMeasurementMetaData.h
+++ b/src/common/getMeasurementMetaData.h
@@ -56,12 +56,24 @@ namespace Recon
         Aurora::Matrix motorPos;
     };
 
+    struct PreComputes
+    {
+        Aurora::Matrix matchedFilter;
+        Aurora::Matrix matchedFilterRef;
+        double timeInterval;
+        bool measuredCEUsed;
+        Aurora::Matrix measuredCE_TASIndices;
+        Aurora::Matrix measuredCE_receiverIndices;
+        double offset;
+    };
+
     //无用函数
     Aurora::Matrix getAvailableMotorPositions(Parser* aParser);
     MeasurementInfo loadMeasurementInfos(Parser* aParser);
     TransFormInfo getTransformationMatrix(Parser* aParser, const Aurora::Matrix& aMotorPosList);
     TempInfo getTemperatureInfo(Parser* aParser, double aNumTas);
     CEInfo getCEInfo(Parser* aParser, const MeasurementInfo aInfo);
+    Aurora::Matrix temperatureToSoundSpeed(const Aurora::Matrix& aTemperature, const std::string& aMethod);
 
 }
 #endif // !GET_MEASUREMENT_METADATA_H
\ No newline at end of file