float ratefloat = (float)rate;

            double a = -1.00844494413448 * pow(10.0f, -12);
            double b = 1.2356986230482 * pow(10.0f, -8);
            double c = -5.94771172066112 * pow(10.0f, -5);
            double d = 0.139443656834417;
            double e = -156.936920229832;
            double f = 68836.3;
            return uint32(a * pow(ratefloat, 5) + b * pow(ratefloat, 4) + c * pow(ratefloat, 3) + d * pow(ratefloat, 2) + e * ratefloat + f);