107 lines
2.5 KiB
C++
Executable File
107 lines
2.5 KiB
C++
Executable File
#ifndef GLOBALS_H_
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#define GLOBALS_H_
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#include <cmath>
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#include <string>
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const double kAE = 1.0;
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const double kQ0 = 120.0;
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const double kS0 = 78.0;
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const double kMU = 398600.8;
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const double kXKMPER = 6378.135;
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const double kXJ2 = 1.082616e-3;
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const double kXJ3 = -2.53881e-6;
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const double kXJ4 = -1.65597e-6;
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/*
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* alternative XKE
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* affects final results
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* aiaa-2006-6573
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* const double kXKE = 60.0 / sqrt(kXKMPER * kXKMPER * kXKMPER / kMU);
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* dundee
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* const double kXKE = 7.43669161331734132e-2;
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*/
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const double kXKE = 60.0 / sqrt(kXKMPER * kXKMPER * kXKMPER / kMU);
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const double kCK2 = 0.5 * kXJ2 * kAE * kAE;
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const double kCK4 = -0.375 * kXJ4 * kAE * kAE * kAE * kAE;
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/*
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* alternative QOMS2T
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* affects final results
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* aiaa-2006-6573
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* #define QOMS2T (pow(((Q0 - S0) / XKMPER), 4.0))
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* dundee
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* #define QOMS2T (1.880279159015270643865e-9)
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*/
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const double kQOMS2T = pow(((kQ0 - kS0) / kXKMPER), 4.0);
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const double kS = kAE * (1.0 + kS0 / kXKMPER);
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const double kPI = 3.14159265358979323846264338327950288419716939937510582;
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const double kTWOPI = 2.0 * kPI;
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const double kTWOTHIRD = 2.0 / 3.0;
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const double kTHDT = 4.37526908801129966e-3;
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/*
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* earth flattening
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*/
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const double kF = 1.0 / 298.26;
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/*
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* earth rotation per sideral day
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*/
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const double kOMEGA_E = 1.00273790934;
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const double kAU = 1.49597870691e8;
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const double kSECONDS_PER_DAY = 86400.0;
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const double kMINUTES_PER_DAY = 1440.0;
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const double kHOURS_PER_DAY = 24.0;
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// Jan 1.0 1900 = Jan 1 1900 00h UTC
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const double kEPOCH_JAN1_00H_1900 = 2415019.5;
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// Jan 1.5 1900 = Jan 1 1900 12h UTC
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const double kEPOCH_JAN1_12H_1900 = 2415020.0;
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// Jan 1.5 2000 = Jan 1 2000 12h UTC
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const double kEPOCH_JAN1_12H_2000 = 2451545.0;
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inline double Fmod2p(const double arg) {
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double modu = fmod(arg, kTWOPI);
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if (modu < 0.0)
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modu += kTWOPI;
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return modu;
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}
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inline double DegreesToRadians(const double degrees) {
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return degrees * kPI / 180.0;
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}
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inline double RadiansToDegrees(const double radians) {
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return radians * 180.0 / kPI;
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}
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inline double AcTan(const double sinx, const double cosx) {
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if (cosx == 0.0) {
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if (sinx > 0.0)
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return kPI / 2.0;
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else
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return 3.0 * kPI / 2.0;
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} else {
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if (cosx > 0.0)
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return atan(sinx / cosx);
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else
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return kPI + atan(sinx / cosx);
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}
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}
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void TrimLeft(std::string& str);
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void TrimRight(std::string& str);
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void Trim(std::string& str);
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#endif
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