风速风向计算,参考Wind Direction Quick Reference | Earth Observing Laboratory实现代码如下

public static void main(String[] args) {
        double u = -10;
        double v = 10;
        double[] dirAndSpeed = getDirAndSpeed(u, v);
        System.out.println("speed:" + dirAndSpeed[0]);
        System.out.println("dir:" + dirAndSpeed[1]);

        double[] uv = getUV(dirAndSpeed[0], dirAndSpeed[1]);
        System.out.println("u:" + uv[0]);
        System.out.println("v:" + uv[1]);
    }

    /**
     * 计算风向风速
     * 正北风为0或360
     *
     * @param u u经向风分量(x)
     * @param v v纬向风分量(y)
     * @return BigDecimal[]
     */
    private static double[] getDirAndSpeed(double u, double v) {
        double ws = Math.sqrt(Math.pow(u, 2) + Math.pow(v, 2));
        double wd = (270 - Math.toDegrees(Math.atan2(v, u))) % 360d;
        return new double[]{ws, wd};
    }

    /**
     * 计算UV向风
     *
     * @param speed 风速
     * @param dir   风向
     * @return BigDecimal[]
     */
    private static double[] getUV(double speed, double dir) {
        double radians = Math.toRadians(dir);
        double u = -speed * Math.sin(radians);
        double v = -speed * Math.cos(radians);
        return new double[]{u, v};
    }