用c语言实现大气折射修正算法
时间: 2023-05-22 07:02:17 浏览: 223
大气折射修正算法是一种用于纠正图像中由于大气折射引起的失真的算法。在C语言中,可以使用以下代码实现大气折射修正算法:
```
#include <stdio.h>
#include <math.h>
#define PI 3.14159265358979323846
double getRefractiveIndex(double altitude) {
double temperature = 15.0 - 0.0065 * altitude;
double pressure = 1013.0 * pow((temperature + 273.15) / 288.15, 5.256);
double humidity = 0.5;
double e = humidity * exp(-37.2465 + 0.213166 * temperature - 0.000256908 * temperature * temperature);
double n = 1.0 + (0.000293 * pressure) / ((1.0 + 0.00367 * temperature) * (1.0 + 0.000018 * pressure)) * (0.0624 - 0.000680 * e + 0.000017 * e * e - 0.000000065 * e * e * e);
return n;
}
double getRefractionAngle(double altitude, double zenithAngle) {
double n = getRefractiveIndex(altitude);
double r = (PI / 180.0) * zenithAngle;
double sinR = sin(r);
double tanR = tan(r);
double sinA = sinR / n;
double cosA = sqrt(1.0 - sinA * sinA);
double tanA = sinA / cosA;
double A = atan(tanA);
double B = atan(tanR);
double refractionAngle = (180.0 / PI) * (B - A);
return refractionAngle;
}
int main() {
double altitude = 0.0;
double zenithAngle = 0.0;
printf("请输入海拔高度(单位:米):");
scanf("%lf", &altitude);
printf("请输入天顶角(单位:度):");
scanf("%lf", &zenithAngle);
double refractionAngle = getRefractionAngle(altitude, zenithAngle);
printf("大气折射修正角度为:%lf\n", refractionAngle);
return 0;
}
```
这段代码可以计算出给定海拔高度和天顶角的情况下,大气折射修正角度的值。
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