ARTS  2.2.66
test_geomag_calc.cc
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1 /* Copyright (C) 2003-2012 Nikolay Koulev <nkoulev@uni-bremen.de>
2 
3  This program is free software; you can redistribute it and/or
4  modify it under the terms of the GNU General Public License as
5  published by the Free Software Foundation; either version 2 of the
6  License, or (at your option) any later version.
7 
8  This program is distributed in the hope that it will be useful,
9  but WITHOUT ANY WARRANTY; without even the implied warranty of
10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  GNU General Public License for more details.
12 
13  You should have received a copy of the GNU General Public License
14  along with this program; if not, write to the Free Software
15  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
16  USA. *
17 
27 #include <cmath>
28 #include <iostream>
29 #include <sstream>
30 #include "exceptions.h"
31 #include "messages.h"
32 #include "math_funcs.h"
33 #include "matpackIII.h"
34 #include "geomag_calc.h"
35 #include "xml_io.h"
36 
37 extern const Numeric EARTH_RADIUS;
38 
39 int main(void)
40 {// Output
41 
42  Numeric B_r; // radial component of the geomagnetic field in [nT].
43  Numeric B_th; // latitudinal component of the geomagnetic field in [nT].
44  Numeric B_ph; // longitudinal component of the geomagnetic field in [nT].
45  Numeric B_tot; // Absolute value of the magnetic field in [nT].
46 
47  // Input
48  Numeric z; // altitutde in [km]
49  Numeric theta; // geocentric colatitude of the point
50  Numeric phi; // longitude of the point
51  // All coordinates - geocentric!
52 
53  Index Ny; // number of elapsed years after an epoch year, J - [0,4]
54 
55 
56 
57 // extern Index messages;
58 
59 // messages.resize(1);
60 
61 // // Set reporting level. (Only the important stuff to the screen,
62 // // everything to the file.)
63 // messages[0].screen = 1;
64 // messages[0].file = 3;
65 
66 
67  // Feed in altitutde above the mean radius of the Earth in [km].
68  cout << "Altitude in km" << endl;
69  cin >> z;
70 
71  // Feed in latitute in degrees.
72  cout << "Latitude in degrees" << endl;
73  cin >> theta;
74 
75  // Feed in longitude in degrees.
76  cout << "Longitude in degrees" << endl;
77  cin >> phi ;
78 
79  // Feed in number of elapsed years after the epoch year.
80  cout << "Ny" << endl;
81  cin >> Ny;
82 
83 
84  // Defining the geocetric radius to the point.
85  const Numeric r = EARTH_RADIUS + z;
86 
87  try
88  {
89  magfield_nk(B_r, B_th, B_ph, r, theta, phi, Ny);
90 
91  // Calculating of the total field.
92  B_tot = sqrt(B_r * B_r + B_th * B_th + B_ph * B_ph);
93 
94  }
95  catch (runtime_error e)
96  {
97  cerr << e.what ();
98  exit(1);
99  }
100 
101  // Output of the radial component of the geomagnetic field in [nT].
102  cout << "B_r = " << B_r << " nT" << endl;
103 
104  // Output of the latitudinal component of the geomagnetic field in [nT].
105  cout << "B_th = " << B_th << " nT" << endl;
106 
107  // Output of the longitudinal component of the geomagnetic field in [nT].
108  cout << "B_ph = " << B_ph << " nT" << endl;
109 
110  // Output of the total geomagnetic field in [nT].
111  cout << "B_tot = " << B_tot << " nT" << endl;
112 
113 
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115 
116 
117 
118 
119 
120 
121 }