replaced one ToDo with another one

mission/controller/acs/SensorProcessing.cpp

@@ -18,6 +18,9 @@ void SensorProcessing::processMgm(const float *mgm0Value, bool mgm0valid, const
   double magIgrfModel[3] = {0.0, 0.0, 0.0};
   bool gpsValid = false;
   if (gpsDataProcessed->source.value != acs::GpsSource::NONE) {
+    // There seems to be a bug here, which causes the model vector to drift until infinity, if the
+    // model class is not initialized new every time. Works for now, but should be investigated.
+    Igrf13Model igrf13;
     igrf13.schmidtNormalization();
     igrf13.updateCoeffGH(timeAbsolute);
     igrf13.magFieldComp(gpsDataProcessed->gdLongitude.value, gpsDataProcessed->gcLatitude.value,