C++实现6S模型
时间: 2023-07-11 16:21:06 浏览: 73
以下是一个简单的C++实现6S模型的示例代码,代码中包括了6S模型中的主要参数和计算公式,但是需要注意的是,6S模型的实现比较复杂,需要考虑很多因素,这里只提供一个简单的示例。
```c++
#include <iostream>
#include <cmath>
using namespace std;
// 计算大气透过率
double calcTrans(double tau_aero, double tau_ray, double omega, double cos_sza, double cos_vza, double raa)
{
double trans;
double a = tau_aero + tau_ray;
double b = (1 - tau_ray) * omega;
double c = tau_aero * omega;
double theta = acos(cos_sza * cos_vza + sin(cos_sza) * sin(cos_vza) * cos(raa));
double f1 = exp(-a / cos_sza);
double f2 = (1 - exp(-a)) / a;
double f3 = exp(-b / cos_sza);
double f4 = (1 - exp(-b)) / b;
double f5 = exp(-c / cos_sza);
double f6 = (1 - exp(-c)) / c;
double p1 = sqrt(pow(cos_sza + cos_vza, 2) + pow(sin(cos_sza) * sin(cos_vza) * sin(raa), 2));
double p2 = max(cos_sza, cos_vza);
double f7 = 0.5 * (1 + 3 * pow(p1, 2)) / (1 + pow(p1, 2));
double f8 = 1.5 * (p2 - 0.5 * pow(p1, 2)) / (1 + pow(p1, 2));
double f9 = 0.5 * (1 - pow(cos_sza, 3));
double f10 = 0.5 * (1 - pow(cos_vza, 3));
double f11 = 1.0 / cos_sza + 1.0 / cos_vza;
trans = f1 * f2 * (f3 * f4 + f5 * f6) * (f7 + f8 * f9 * f10) * f11;
return trans;
}
// 计算大气反射率
double calcRef(double tau_aero, double tau_ray, double omega, double cos_sza, double cos_vza, double raa)
{
double ref;
double a = tau_aero + tau_ray;
double b = (1 - tau_ray) * omega;
double c = tau_aero * omega;
double theta = acos(cos_sza * cos_vza + sin(cos_sza) * sin(cos_vza) * cos(raa));
double f1 = exp(-a / cos_sza);
double f2 = (1 - exp(-a)) / a;
double f3 = exp(-b / cos_sza);
double f4 = (1 - exp(-b)) / b;
double f5 = exp(-c / cos_sza);
double f6 = (1 - exp(-c)) / c;
double p1 = sqrt(pow(cos_sza + cos_vza, 2) + pow(sin(cos_sza) * sin(cos_vza) * sin(raa), 2));
double p2 = max(cos_sza, cos_vza);
double f7 = 0.5 * (1 + 3 * pow(p1, 2)) / (1 + pow(p1, 2));
double f8 = 1.5 * (p2 - 0.5 * pow(p1, 2)) / (1 + pow(p1, 2));
double f9 = 0.5 * (1 - pow(cos_sza, 3));
double f10 = 0.5 * (1 - pow(cos_vza, 3));
double f11 = 1.0 / cos_sza + 1.0 / cos_vza;
double trans = calcTrans(tau_aero, tau_ray, omega, cos_sza, cos_vza, raa);
ref = (1 - exp(-a)) * (f3 * f4 + f5 * f6) * (f7 + f8 * f9 * f10) * f11 / trans;
return ref;
}
int main()
{
double tau_aero = 0.1; // 大气气溶胶光学厚度
double tau_ray = 0.1; // 大气分子光学厚度
double omega = 0.8; // 地表反射率
double cos_sza = 0.5; // 太阳天顶角余弦值
double cos_vza = 0.5; // 观测天顶角余弦值
double raa = 0.5; // 相对方位角
double trans = calcTrans(tau_aero, tau_ray, omega, cos_sza, cos_vza, raa);
double ref = calcRef(tau_aero, tau_ray, omega, cos_sza, cos_vza, raa);
cout << "trans = " << trans << endl;
cout << "ref = " << ref << endl;
return 0;
}
```
需要注意的是,该代码中只考虑了简单的参数和计算公式,实际应用中需要考虑更多的因素和复杂的计算。