给我一个电离层TEC预报的C++代码
时间: 2023-05-28 17:06:57 浏览: 159
以下是一个简单的电离层TEC预报C代码:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define PI 3.14159265358979323846
double getTEC(double latitude, double longitude, double altitude, double time);
int main()
{
double latitude, longitude, altitude, time, tec;
printf("Enter latitude (in degrees): ");
scanf("%lf", &latitude);
printf("Enter longitude (in degrees): ");
scanf("%lf", &longitude);
printf("Enter altitude (in km): ");
scanf("%lf", &altitude);
printf("Enter time (in hours): ");
scanf("%lf", &time);
tec = getTEC(latitude, longitude, altitude, time);
printf("Predicted TEC: %lf TECU\n", tec);
return 0;
}
double getTEC(double latitude, double longitude, double altitude, double time)
{
double slat, clat, slon, clon, st, ct, tec, re, hiono, f, f1, f2;
double lat, lon, phi, psi, x, y, z, r;
int i, j, n;
slat = sin(latitude * PI/180.0);
clat = cos(latitude * PI/180.0);
slon = sin(longitude * PI/180.0);
clon = cos(longitude * PI/180.0);
st = sin(time * PI/12.0);
ct = cos(time * PI/12.0);
tec = 0.0;
re = 6371.2;
hiono = 350.0;
f = 1.0;
f1 = 1575.42e6;
f2 = 1227.60e6;
n = 100;
for (i = 1; i <= n; i++) {
phi = 2.0 * PI * (i - 0.5) / n;
for (j = 1; j <= n; j++) {
psi = PI * (j - 0.5) / n;
x = (re + altitude) * cos(psi) * cos(phi);
y = (re + altitude) * cos(psi) * sin(phi);
z = (re + altitude) * sin(psi);
r = sqrt(x*x + y*y + z*z);
lat = asin(z / r) * 180.0 / PI;
lon = atan2(y, x) * 180.0 / PI;
slat = sin(lat * PI/180.0);
clat = cos(lat * PI/180.0);
slon = sin(lon * PI/180.0);
clon = cos(lon * PI/180.0);
f = f1 / (f1 - f2);
tec += 1.0e16 * f * hiono * exp(-r/hiono) / (r*r) * (1.0 - 3.0*slat*slat) * ct * ((clat*clon*st - slon*ct)*cos(latitude*PI/180.0) - clat*st*sin(latitude*PI/180.0));
}
}
tec *= 2.0 * PI * PI / (n * n);
return tec;
}
请注意,此代码仅用于演示目的,可能需要进行改进和调整以适应特定的应用场景。此外,此代码仅用于计算纯电离层TEC,不考虑其他影响因素。