输入卫星星号和观测时刻计算卫星位置c++代码
时间: 2023-11-13 13:05:07 浏览: 33
以下是一个简单的计算卫星位置的C++代码示例,其中使用了SGP4模型:
```
#include <iostream>
#include <iomanip>
#include "sgp4/sgp4io.h"
#include "sgp4/sgp4unit.h"
int main() {
// 输入卫星星号和观测时刻
int satNum;
char line1[130], line2[130];
double epochYear, epochDay, epochTime;
std::cout << "Enter satellite number: ";
std::cin >> satNum;
std::cout << "Enter epoch year: ";
std::cin >> epochYear;
std::cout << "Enter epoch day: ";
std::cin >> epochDay;
std::cout << "Enter epoch time: ";
std::cin >> epochTime;
// 读取TLE文件
std::ifstream tleFile("tle.txt");
if (!tleFile.is_open()) {
std::cerr << "Error opening TLE file" << std::endl;
return 1;
}
std::string line;
while (std::getline(tleFile, line)) {
if (std::stoi(line.substr(2, 5)) == satNum) {
std::strcpy(line1, line.c_str());
std::getline(tleFile, line);
std::strcpy(line2, line.c_str());
break;
}
}
// 初始化SGP4模型
gravconsttype whichconst = wgs72;
double tsince = (epochYear - 56) * 365.25 + epochDay - 1 + epochTime / 24.0;
elsetrec satrec;
twoline2rv(line1, line2, 'c', 'm', 'i', whichconst, satrec);
// 计算卫星位置
double jd = 2451545.0 + satrec.jdsatepoch + tsince / 1440.0;
double mjd = jd - 2400000.5;
double fr = tsince - std::floor(tsince);
double jul_utc = mjd + 0.5;
double jul_tt = jul_utc + (35 + 32.184) / 86400;
double jd_tt = jul_tt + 2400000.5;
double jd_ut1 = jd_tt + (ut1_utc(jd_tt) / 86400);
double lst = gstime(jd_ut1) + satrec.nodeo;
if (lst > pi) lst -= twopi;
else if (lst < 0.0) lst += twopi;
double lat, lon, alt;
double r[3], v[3];
sgp4(satrec, tsince, r, v);
rec2sph(r, lat, lon, alt);
// 输出结果
std::cout << std::fixed << std::setprecision(6) << "Latitude: " << lat * rad2deg << " deg" << std::endl;
std::cout << std::fixed << std::setprecision(6) << "Longitude: " << lon * rad2deg << " deg" << std::endl;
std::cout << std::fixed << std::setprecision(3) << "Altitude: " << alt << " km" << std::endl;
return 0;
}
```
需要注意的是,这里假设有一个名为"tle.txt"的文件,其中包含了所有需要计算的卫星的TLE数据。此外,此代码并没有考虑时间与卫星位置的误差,因此对于高精度的计算,还需要进行更多的调整。