public PCore2D(double rErrThreshold, double simplexSize, Ellipsoid refEllipsoid, int courseEstimatorFifoSize)
{
targetLocation = new GeoPoint3D(double.NaN, double.NaN, double.NaN);
targetLocationTS = DateTime.MinValue;
crsEstimator = new CourseEstimatorLA2D(courseEstimatorFifoSize);
RadialErrorThreshold = rErrThreshold;
SimplexSize = simplexSize;
referenceEllipsoid = refEllipsoid;
}