Hi all,

I am making a C++ azimuth calculator using the formula at the top of this page:

Launch Azimuth - OrbiterWiki

I am using the formula to calculate 'example 1' on the page, with the Cape Canaveral - ISS launch. Instead of the 45 degree answer, I get -144 degrees. Here is the code:

Code:#include <iostream> #include <math.h> #include <process.h> #include <conio.h> using namespace std; int main () { double lat; double az; double inc; char ch; start: cout << "To calculate azimuth (degrees), enter target inclination and press enter: " << "\n"; cin >> inc; cout << "To calculate azimuth (degrees), enter departure latitude and press enter: " << "\n"; cin >> lat; if (lat > inc) goto error; az = asin(cos (inc)/cos (lat)); cout << "\n" << "Azimuth is: " << az * 100 << " degrees"; goto end; end: cout << "\n" << "\n" << "Press enter to recalculate."; ch = _getch(); if (ch == 13) system("cls"); goto start; error: cout << "\n" << "Can't calculate if inclination is lower than latitude."; goto end; return 0; }