1 | // $Id: Atmosphere.cc 3002 2011-12-06 08:09:02Z fenu $ |
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2 | // S. Moreggia created 27 October 2003 |
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3 | |
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4 | /***************************************************************************** |
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5 | * ESAF: Euso Simulation and Analysis Framework * |
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6 | * * |
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7 | * Id: Atmosphere * |
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8 | * Package: atmosphere * |
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9 | * Coordinator: S. Moreggia * |
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10 | * * |
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11 | *****************************************************************************/ |
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12 | |
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13 | //_____________________________________________________________________________ |
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14 | // |
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15 | // Atmosphere |
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16 | // |
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17 | // <extensive class description> |
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18 | // |
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19 | // Config file parameters |
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20 | // ====================== |
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21 | // |
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22 | // <parameter name>: <parameter description> |
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23 | // -Valid options: <available options> |
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24 | // |
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25 | |
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26 | #include "Atmosphere.hh" |
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27 | #include "AtmosphereFactory.hh" |
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28 | #include "LinsleyAtmosphere.hh" |
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29 | #include "LowtranAtmosphere.hh" |
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30 | #include "MSISE_00Atmosphere.hh" |
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31 | #include "Config.hh" |
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32 | #include "EConst.hh" |
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33 | #include "utils.hh" |
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34 | #include "NumbersFileParser.hh" |
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35 | |
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36 | #include <TF1.h> |
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37 | #include <TSpline.h> |
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38 | |
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39 | ClassImp(Atmosphere) |
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40 | |
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41 | using namespace sou; |
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42 | using namespace TMath; |
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43 | using namespace EConst; |
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44 | |
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45 | Atmosphere* Atmosphere::fChild = NULL; |
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46 | |
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47 | //______________________________________________________________________________ |
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48 | Double_t densityIntegral(Double_t *x, Double_t *par) |
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49 | { |
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50 | // |
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51 | Double_t Altitude = par[0], Angle = par[1]; |
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52 | Double_t H0=8.43*km; // An auxiliary constant, km |
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53 | Double_t h = Altitude - H0*TMath::Log(x[0]); |
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54 | Double_t f = ((EarthRadius() + Altitude)/(EarthRadius() + h))*TMath::Sin(Angle); |
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55 | return H0*Atmosphere::Get()->Air_Density(h)/TMath::Sqrt(1.-TMath::Power(f,2))/x[0]; |
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56 | } |
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57 | |
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58 | //______________________________________________________________________________ |
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59 | Atmosphere::Atmosphere() : EsafConfigurable(), EsafMsgSource() { |
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60 | // |
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61 | // ctor |
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62 | // |
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63 | |
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64 | // builds clouds and aerosol if required |
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65 | fClouds = AtmosphereFactory::Get()->GetClouds(); |
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66 | if(!fClouds) Msg(EsafMsg::Panic) <<"No clouds built : memory problems"<< MsgDispatch; |
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67 | fAerosol = AtmosphereFactory::Get()->GetAerosol(); |
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68 | if(!fAerosol) Msg(EsafMsg::Panic) <<"No aerosol built : memory problems"<< MsgDispatch; |
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69 | |
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70 | // init |
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71 | fDepthCalculationPrecision = 1.e-5; |
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72 | fTempInterpol = 0; |
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73 | fDensInterpol = 0; |
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74 | fPressInterpol = 0; |
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75 | fMSISErandom = kFALSE; |
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76 | fTOA = 100*km; |
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77 | |
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78 | // read ozone coeff. |
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79 | fWvNBmin = 27370.; |
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80 | fWvNBmax = 40800.; |
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81 | NumbersFileParser nf0("config/Atmosphere/O3Crossec/O3CrossecT0",1); |
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82 | vector<Double_t> temp0 = nf0.GetCol(0); |
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83 | NumbersFileParser nf1("config/Atmosphere/O3Crossec/O3CrossecT1",1); |
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84 | vector<Double_t> temp1 = nf1.GetCol(0); |
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85 | NumbersFileParser nf2("config/Atmosphere/O3Crossec/O3CrossecT2",1); |
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86 | vector<Double_t> temp2 = nf2.GetCol(0); |
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87 | for(Int_t i=0; i < 2690; i++) { |
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88 | if(i < 2687) fC0[i] = temp0[i]; |
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89 | fC1[i] = temp1[i]; |
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90 | fC2[i] = temp2[i]; |
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91 | } |
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92 | } |
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93 | |
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94 | //______________________________________________________________________________ |
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95 | Atmosphere::~Atmosphere() { |
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96 | // |
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97 | // dtor |
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98 | // |
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99 | SafeDelete(fClouds); |
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100 | SafeDelete(fAerosol); |
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101 | SafeDelete(fTempInterpol); |
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102 | SafeDelete(fDensInterpol); |
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103 | SafeDelete(fPressInterpol); |
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104 | } |
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105 | |
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106 | //______________________________________________________________________________ |
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107 | void Atmosphere::Delete() { |
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108 | // |
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109 | // staic method to call dtor |
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110 | // |
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111 | |
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112 | SafeDelete(fChild); |
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113 | } |
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114 | |
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115 | //______________________________________________________________________________ |
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116 | const Atmosphere* Atmosphere::Get() { |
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117 | // |
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118 | // Static method to get the right atmosphere singleton from anywhere in the code |
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119 | // |
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120 | if(fChild == 0) { |
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121 | ConfigFileParser *pConfig = Config::Get()->GetCF("Atmosphere","AtmosphereFactory"); |
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122 | string type = pConfig->GetStr("AtmosphereFactory.Atmosphere.type"); |
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123 | |
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124 | if(type == "linsley") |
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125 | LinsleyAtmosphere::CreateInstance(); |
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126 | |
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127 | else if(type == "msise00") |
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128 | MSISE_00Atmosphere::CreateInstance(); |
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129 | |
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130 | else if(type == "RandomMsise00") { |
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131 | MSISE_00Atmosphere::CreateInstance(); |
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132 | fChild->SetRandomMode(); |
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133 | } |
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134 | |
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135 | else if(type == "lowtran") |
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136 | LowtranAtmosphere::CreateInstance(); |
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137 | |
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138 | else cout<<"Wrong type of atmosphere\n"; |
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139 | fChild->Msg(EsafMsg::Info) << "Atmosphere built" << MsgDispatch; |
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140 | } |
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141 | |
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142 | return fChild; |
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143 | } |
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144 | |
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145 | //______________________________________________________________________________ |
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146 | void Atmosphere::Reset() { |
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147 | // |
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148 | // Static method to reset atmosphere : useful only in MSISErandom mode |
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149 | // |
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150 | |
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151 | if(fChild) { |
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152 | if(fChild->IsRandomMode()) { |
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153 | MSISE_00Atmosphere* atmo = (MSISE_00Atmosphere*)fChild; |
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154 | atmo->ResetInstance(); |
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155 | } |
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156 | } |
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157 | } |
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158 | |
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159 | //______________________________________________________________________________ |
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160 | Double_t Atmosphere::GetOzoneCoeff(Double_t wl, UInt_t i) const { |
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161 | // |
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162 | // get Ozone C coeff. using fC tables (i=0 C0, i=1 C1, i=2 C2) |
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163 | // Lowtran tables have been generated using a WvNB stepwidth of 5 |
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164 | // |
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165 | |
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166 | Double_t rtn = 0.; |
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167 | Double_t WvNB = TranslateInWvNB(wl); |
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168 | if(WvNB < fWvNBmin || WvNB > fWvNBmax) return 0.; |
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169 | Int_t index = Int_t((WvNB - fWvNBmin) / 5.); |
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170 | if(i == 0) rtn = fC0[index]; |
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171 | else if(i == 1) rtn = fC1[index]; |
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172 | else if(i == 2) rtn = fC2[index]; |
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173 | else Msg(EsafMsg::Panic) << "<GetOzoneCoeff> Wrong argument asked" << MsgDispatch; |
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174 | |
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175 | return rtn; |
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176 | } |
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177 | |
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178 | //______________________________________________________________________________ |
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179 | Double_t Atmosphere::Index(Double_t h, Double_t wl) const { |
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180 | // |
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181 | // Returns air index value at a given altitude |
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182 | // By default, it is taken CONSTANT with wavelength (lambda=350nm) |
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183 | // (formula drawn from Reinhard Beer, Hanbook of Optics, Chap.2) |
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184 | // |
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185 | Double_t rtn; |
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186 | rtn = Index_Minus1(h,wl); |
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187 | return 1 + rtn; |
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188 | } |
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189 | |
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190 | //______________________________________________________________________________ |
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191 | Double_t Atmosphere::Index_Minus1(Double_t h, Double_t wl) const { |
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192 | // |
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193 | // Returns (n-1) at a given altitude |
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194 | // By default, it is taken CONSTANT with wavelength (lambda=350nm) |
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195 | // (formula drawn from Reinhard Beer, Hanbook of Optics, Chap.2) |
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196 | // |
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197 | Double_t rtn; |
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198 | rtn = 88.43 + 185.08/(1 - 1/pow(wl/cm*1.14e5,2)) + 4.11/(1 - 1/pow(wl/cm*6.24e4,2)); |
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199 | rtn *= (Pressure(h) - WaterVaporPartialPressure(h))/Temperature(h); |
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200 | rtn *= 296.15*kelvin/atmosphere; |
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201 | rtn += (43.49 - 1/pow(wl/cm*1.7e4,2))*WaterVaporPartialPressure(h)/atmosphere; |
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202 | return rtn*1e-6; |
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203 | } |
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204 | |
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205 | //______________________________________________________________________________ |
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206 | Double_t Atmosphere::Grammage(const EarthVector& V_1, const EarthVector& V_2, string opt, Double_t maxalt) const { |
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207 | // |
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208 | // Calculate grammage |
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209 | // - opt = pos : between two positions V1, V2 in the atmosphere |
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210 | // - opt = dir : from a point V1 until atmosphere top, along a track of given angles (V2 thus used for direction) |
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211 | // |
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212 | Double_t dl = 500*m; |
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213 | Double_t dX, rho2, h2; |
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214 | EarthVector U, inter; |
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215 | EarthVector V1(V_1), V2(V_2); |
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216 | Double_t X = 0; |
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217 | Double_t rho1; |
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218 | Bool_t IsTooHigh = false; |
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219 | if(maxalt == -HUGE) maxalt = fTOA; |
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220 | |
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221 | if(opt == "pos") { |
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222 | EarthVector Vmin; |
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223 | EarthVector Vmax; |
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224 | if(V1.IsUnderSeaLevel() || V2.IsUnderSeaLevel()) { |
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225 | if(V1.IsUnderSeaLevel() && V2.IsUnderSeaLevel()) { |
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226 | Msg(EsafMsg::Warning) << "<Grammage> Both V1 and V2 are under sea level --> SHOULD NOT OCCUR, zero returned"<<MsgDispatch; |
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227 | return 0.; |
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228 | } |
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229 | Msg(EsafMsg::Warning) << "<Grammage> V1 or V2 is under sea level --> search for the true track impact"<<MsgDispatch; |
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230 | EarthVector impact(1); |
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231 | impact = ImpactASL(V1,(V2 - V1).Unit()); |
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232 | if(impact.Z() == -HUGE) { |
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233 | impact = ImpactASL(V2,(V1 - V2).Unit()); |
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234 | if(impact.Z() == HUGE || impact.Z() == -HUGE) { |
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235 | Msg(EsafMsg::Warning) << "<Grammage> Failed to find an impact, zero returned"<<MsgDispatch; |
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236 | return 0.; |
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237 | } |
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238 | else V1 = impact; |
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239 | } |
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240 | else V2 = impact; |
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241 | } |
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242 | |
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243 | if(V1.Zv() <= V2.Zv()) { |
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244 | Vmin = V1; |
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245 | Vmax = V2; |
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246 | } |
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247 | else { |
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248 | Vmin = V2; |
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249 | Vmax = V1; |
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250 | } |
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251 | |
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252 | if(Vmax.Zv() > maxalt) IsTooHigh = true; |
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253 | U = (Vmax - Vmin).Unit(); |
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254 | inter = Vmin; |
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255 | rho1 = Air_Density(Vmin.Zv()); |
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256 | |
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257 | while((Vmax - Vmin).Mag() > (inter - Vmin).Mag()) { |
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258 | if( (inter + U*dl - Vmin).Mag() >= (Vmax - Vmin).Mag() ) { |
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259 | rho2 = Air_Density(Vmax.Zv()); |
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260 | dX = 0.5*(rho1 + rho2) * (Vmax - inter).Mag(); |
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261 | X += dX; |
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262 | break; |
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263 | } |
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264 | inter += U*dl; |
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265 | h2 = inter.Zv(); |
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266 | if(h2 > maxalt && IsTooHigh) break; |
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267 | rho2 = Air_Density(h2); |
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268 | dX = 0.5*(rho1 + rho2) * dl; |
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269 | X += dX; |
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270 | rho1 = rho2; |
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271 | } |
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272 | } |
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273 | |
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274 | |
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275 | else if(opt == "dir") { |
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276 | if(V1.IsUnderSeaLevel()) Msg(EsafMsg::Warning) << "<Grammage> V1 is under sea level : it SHOULD NOT"<<MsgDispatch; |
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277 | EarthVector TOA = ImpactAtTOA(V1,V2,fTOA); |
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278 | if(TOA.Z() == -HUGE) { |
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279 | Msg(EsafMsg::Warning) << "<Grammage(\"dir\")> : starting position is UNDERSEALEVEL, O returned" << MsgDispatch; |
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280 | return 0.; |
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281 | } |
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282 | if(TOA.Z() == HUGE) { |
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283 | Msg(EsafMsg::Warning) << "<Grammage(\"dir\")> : track DOES NOT GO OUT atmosphere, O returned" << MsgDispatch; |
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284 | return 0.; |
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285 | } |
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286 | U = V2.Unit(); |
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287 | inter = V1; |
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288 | rho1 = Air_Density(V1.Zv()); |
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289 | while(true) { |
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290 | inter += U*dl; |
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291 | h2 = inter.Zv(); |
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292 | rho2 = Air_Density(h2); |
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293 | dX = 0.5*(rho1 + rho2) * dl; |
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294 | X += dX; |
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295 | rho1 = rho2; |
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296 | if((inter - V1).Mag() > (TOA - V1).Mag()) break; |
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297 | } |
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298 | } |
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299 | |
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300 | else Msg(EsafMsg::Warning) << "Wrong option for grammage calculation" << MsgDispatch; |
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301 | |
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302 | return X; |
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303 | } |
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304 | |
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305 | //______________________________________________________________________________ |
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306 | Double_t Atmosphere::OzoneAmountAlongPath(const EarthVector& V_1, const EarthVector& V_2, Double_t wl) const { |
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307 | // |
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308 | // Get ozone amount along the path, at given wavelength |
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309 | // Integrate X_path(s,wl) = Crossec(s,wl) * OzDens(s) * ds along the defined path |
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310 | // |
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311 | |
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312 | // init |
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313 | Double_t dl = 500*m; |
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314 | Double_t maxalt = 60*km; // Ozone amount negligible above this altitude |
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315 | Double_t dX, rho2, h2; |
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316 | EarthVector U, inter; |
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317 | EarthVector V1(V_1), V2(V_2); |
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318 | Double_t X = 0; |
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319 | Double_t rho1; |
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320 | Bool_t IsTooHigh = false; |
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321 | |
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322 | // find wavelength dependent Ozone coeff. |
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323 | Double_t C0 = GetOzoneCoeff(wl,0); |
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324 | Double_t C1 = GetOzoneCoeff(wl,1); |
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325 | Double_t C2 = GetOzoneCoeff(wl,2); |
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326 | |
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327 | EarthVector Vmin; |
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328 | EarthVector Vmax; |
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329 | if(V1.IsUnderSeaLevel() || V2.IsUnderSeaLevel()) { |
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330 | if(V1.IsUnderSeaLevel() && V2.IsUnderSeaLevel()) { |
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331 | Msg(EsafMsg::Warning) << "<OzoneAmountAlongPath> Both V1 and V2 are under sea level --> SHOULD NOT OCCUR, zero returned"<<MsgDispatch; |
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332 | return 0.; |
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333 | } |
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334 | Msg(EsafMsg::Warning) << "<OzoneAmountAlongPath> V1 or V2 is under sea level --> search for the true track impact"<<MsgDispatch; |
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335 | EarthVector impact(1); |
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336 | impact = ImpactASL(V1,(V2 - V1).Unit()); |
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337 | if(impact.Z() == -HUGE) { |
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338 | impact = ImpactASL(V2,(V1 - V2).Unit()); |
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339 | if(impact.Z() == HUGE || impact.Z() == -HUGE) { |
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340 | Msg(EsafMsg::Warning) << "<OzoneAmountAlongPath> Failed to find an impact, zero returned"<<MsgDispatch; |
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341 | return 0.; |
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342 | } |
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343 | else V1 = impact; |
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344 | } |
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345 | else V2 = impact; |
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346 | } |
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347 | |
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348 | if(V1.Zv() <= V2.Zv()) { |
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349 | Vmin = V1; |
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350 | Vmax = V2; |
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351 | } |
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352 | else { |
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353 | Vmin = V2; |
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354 | Vmax = V1; |
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355 | } |
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356 | |
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357 | if(Vmax.Zv() > maxalt) IsTooHigh = true; |
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358 | U = (Vmax - Vmin).Unit(); |
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359 | inter = Vmin; |
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360 | Double_t DeltaT = Temperature(Vmin.Zv()) - STP_Temperature(); |
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361 | rho1 = O3_DensityPPMV(Vmin.Zv()) * C0 *(1 + C1*DeltaT + C2*DeltaT*DeltaT) * Pressure(Vmin.Zv()) / Temperature(Vmin.Zv()); |
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362 | |
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363 | |
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364 | while((Vmax - Vmin).Mag() > (inter - Vmin).Mag()) { |
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365 | if( (inter + U*dl - Vmin).Mag() >= (Vmax - Vmin).Mag() ) { |
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366 | DeltaT = Temperature(Vmax.Zv()) - STP_Temperature(); |
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367 | rho2 = O3_DensityPPMV(Vmax.Zv()) * C0 *(1 + C1*DeltaT + C2*DeltaT*DeltaT) * Pressure(Vmax.Zv()) / Temperature(Vmax.Zv()); |
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368 | dX = 0.5*(rho1 + rho2) * (Vmax - inter).Mag()/km; |
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369 | X += dX; |
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370 | break; |
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371 | } |
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372 | inter += U*dl; |
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373 | h2 = inter.Zv(); |
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374 | if(h2 > maxalt && IsTooHigh) break; |
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375 | DeltaT = Temperature(h2) - STP_Temperature(); |
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376 | rho2 = O3_DensityPPMV(h2) * C0 *(1 + C1*DeltaT + C2*DeltaT*DeltaT) * Pressure(h2) / Temperature(h2); |
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377 | dX = 0.5*(rho1 + rho2) * dl/km; |
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378 | X += dX; |
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379 | rho1 = rho2; |
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380 | } |
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381 | |
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382 | return X*0.0269*STP_Temperature()/STP_Pressure(); |
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383 | } |
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384 | |
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385 | //______________________________________________________________________________ |
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386 | Int_t Atmosphere::InvertGrammage(const EarthVector& pos1, const EarthVector& direc, Double_t depth, EarthVector& rtn, Double_t TOA_alt, Double_t maxtof) const { |
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387 | // |
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388 | // calculate final position for given pos1,direc and air depth |
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389 | // |
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390 | // if 0 < TOA_alt < fTOA --> TOA_alt is used to make present calculation (to optimize CPU time) |
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391 | // |
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392 | // it returns : -1 if pos1 is under sea level or if none impact (latter should not occur) |
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393 | // 0 if position found |
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394 | // 1 if TOF cut or infinite loop |
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395 | // 2 if TOA reached before |
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396 | // 3 if sea level reached before |
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397 | // |
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398 | |
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399 | // init |
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400 | Int_t status(-1); |
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401 | if(pos1.IsUnderSeaLevel()) return status; |
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402 | if(rtn.Mag()) rtn.SetMag(0); |
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403 | EarthVector dir = direc.Unit(); |
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404 | EarthVector impact(1); |
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405 | Double_t TOA(0.); |
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406 | |
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407 | // TOA settings |
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408 | if( (0 < TOA_alt) && (TOA_alt < fTOA) ) TOA = TOA_alt; |
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409 | else TOA = fTOA; |
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410 | |
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411 | // in case depth is null |
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412 | if(!depth) { |
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413 | rtn = pos1; |
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414 | return 0; |
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415 | } |
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416 | |
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417 | // check if sea level reached before foreseen air depth been travelled |
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418 | // check if TOA reached before the foreseen air depth has been travelled |
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419 | impact = ImpactASL(pos1,dir); |
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420 | // if no impact at sea level |
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421 | if(impact.Z() == HUGE) { |
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422 | impact = ImpactAtTOA(pos1,dir,TOA); |
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423 | if(impact.Z() == HUGE) { |
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424 | Msg(EsafMsg::Warning) << "<InvertGrammage> track reaches NEITHER sea level NOR TOA -> SHOUD NOT HAPPEN"<<MsgDispatch; |
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425 | return -1; |
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426 | } |
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427 | if(Grammage(pos1,impact) < depth) { |
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428 | rtn = impact; |
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429 | return 2; |
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430 | } |
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431 | } |
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432 | else { |
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433 | if(Grammage(pos1,impact) < depth) { |
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434 | rtn = impact; |
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435 | return 3; |
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436 | } |
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437 | } |
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438 | |
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439 | |
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440 | // step by step process until it reaches depth value |
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441 | Double_t dl = 500*m; |
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442 | Double_t dX, rho2, h2; |
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443 | EarthVector U, inter; |
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444 | Double_t X = 0.; |
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445 | Double_t rho1; |
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446 | U = dir; |
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447 | inter = pos1; |
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448 | rho1 = Air_Density(pos1.Zv()); |
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449 | if((inter - impact).Mag() < dl) dl = (inter - impact).Mag(); |
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450 | |
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451 | Int_t counter(0), tofcut(0); |
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452 | if(maxtof < 0) tofcut = Int_t(2*(EarthRadius() + fTOA) / dl) + 1; |
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453 | else tofcut = Int_t(maxtof*Clight() / dl); |
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454 | while(true) { |
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455 | if(counter++ > tofcut) { |
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456 | #ifdef DEBUG |
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457 | //Msg(EsafMsg::Debug) <<"<atmoInvertGrammage> TOF cut reached : photon dumped here "<<MsgDispatch; |
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458 | #endif |
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459 | if(rtn.Mag() == 0) rtn = pos1; |
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460 | return 1; |
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461 | } |
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462 | if(counter > Int_t(2*(EarthRadius() + fTOA) / dl)) { |
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463 | Msg(EsafMsg::Warning) <<"<atmoInvertGrammage> \"infinite\" loop (>2*EarthRadius travelled) broken by hand "<<MsgDispatch; |
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464 | if(rtn.Mag() == 0) rtn = pos1; |
---|
465 | return 1; |
---|
466 | } |
---|
467 | inter += U*dl; |
---|
468 | h2 = inter.Zv(); |
---|
469 | rho2 = Air_Density(h2); |
---|
470 | dX = 0.5*(rho1 + rho2) * dl; |
---|
471 | if((X + dX) >= depth) break; |
---|
472 | X += dX; |
---|
473 | rho1 = rho2; |
---|
474 | if((inter - impact).Mag() < dl) dl = (inter - impact).Mag(); |
---|
475 | } |
---|
476 | // come back to last iteration for fine tuning |
---|
477 | rtn = inter - U*dl; |
---|
478 | Double_t slope = (rho2 - rho1) / dl; // density profile considered linear locally |
---|
479 | if(slope) dl = sign(slope) * sqrt( (rho1/slope) * (rho1/slope) + 2.*(depth - X) / slope) - rho1/slope; |
---|
480 | else dl = (depth - X) / rho1; // if constant density |
---|
481 | rtn += U*dl; |
---|
482 | |
---|
483 | if(rtn.Mag() == 0) rtn = pos1; |
---|
484 | |
---|
485 | return 0; |
---|
486 | } |
---|
487 | |
---|
488 | //______________________________________________________________________________ |
---|
489 | Int_t Atmosphere::InvertOzoneAmount(const EarthVector& pos1, const EarthVector& direc, Double_t OzAmount, Double_t wl, EarthVector& rtn, Double_t TOA_alt, Double_t maxtof) const { |
---|
490 | // |
---|
491 | // calculate position corresponding to ozone amount, using given pos1,direc |
---|
492 | // |
---|
493 | // if 0 < TOA_alt < fTOA --> TOA_alt is used to make present calculation (to optimize CPU time) |
---|
494 | // |
---|
495 | // it returns : -1 if pos1 is under sea level or if none impact (latter should not occur) |
---|
496 | // 0 if position found |
---|
497 | // 1 if TOF cut or infinite loop |
---|
498 | // 2 if TOA reached before |
---|
499 | // 3 if sea level reached before |
---|
500 | // |
---|
501 | |
---|
502 | // init |
---|
503 | Int_t status(-1); |
---|
504 | if(pos1.IsUnderSeaLevel()) return status; |
---|
505 | if(rtn.Mag()) rtn.SetMag(0); |
---|
506 | EarthVector dir = direc.Unit(); |
---|
507 | EarthVector impact(1); |
---|
508 | Double_t TOA(0.); |
---|
509 | |
---|
510 | // TOA settings |
---|
511 | if( (0 < TOA_alt) && (TOA_alt < fTOA) ) TOA = TOA_alt; |
---|
512 | else TOA = fTOA; |
---|
513 | |
---|
514 | // in case ozone amount is null |
---|
515 | if(OzAmount == 0.) { |
---|
516 | rtn = pos1; |
---|
517 | return 0; |
---|
518 | } |
---|
519 | |
---|
520 | // find wavelength dependent Ozone coeff. |
---|
521 | Double_t C0 = GetOzoneCoeff(wl,0); |
---|
522 | Double_t C1 = GetOzoneCoeff(wl,1); |
---|
523 | Double_t C2 = GetOzoneCoeff(wl,2); |
---|
524 | |
---|
525 | |
---|
526 | // check if sea level reached before foreseen ozone amount been traveled |
---|
527 | // check if TOA reached before the foreseen ozone amount has been traveled |
---|
528 | impact = ImpactASL(pos1,dir); |
---|
529 | // if no impact at sea level |
---|
530 | if(impact.Z() == HUGE) { |
---|
531 | impact = ImpactAtTOA(pos1,dir,TOA); |
---|
532 | if(impact.Z() == HUGE) { |
---|
533 | Msg(EsafMsg::Warning) << "<InvertOzoneAmount> track reaches NEITHER sea level NOR TOA -> SHOUD NOT HAPPEN"<<MsgDispatch; |
---|
534 | return -1; |
---|
535 | } |
---|
536 | if(OzoneAmountAlongPath(pos1,impact,wl) < OzAmount) { |
---|
537 | rtn = impact; |
---|
538 | return 2; |
---|
539 | } |
---|
540 | } |
---|
541 | else { |
---|
542 | if(OzoneAmountAlongPath(pos1,impact,wl) < OzAmount) { |
---|
543 | rtn = impact; |
---|
544 | return 3; |
---|
545 | } |
---|
546 | } |
---|
547 | |
---|
548 | |
---|
549 | // step by step process until it reaches OzAmount value |
---|
550 | Double_t dl = 500*m; |
---|
551 | Double_t dX, rho2, h2; |
---|
552 | EarthVector U, inter; |
---|
553 | Double_t X = 0.; |
---|
554 | Double_t rho1; |
---|
555 | U = dir; |
---|
556 | inter = pos1; |
---|
557 | Double_t DeltaT = Temperature(pos1.Zv()) - STP_Temperature(); |
---|
558 | rho1 = O3_DensityPPMV(pos1.Zv()) * C0 *(1 + C1*DeltaT + C2*DeltaT*DeltaT) * Pressure(pos1.Zv()) / Temperature(pos1.Zv()); |
---|
559 | if((inter - impact).Mag() < dl) dl = (inter - impact).Mag(); |
---|
560 | |
---|
561 | Int_t counter(0), tofcut(0); |
---|
562 | Int_t stopvalue = Int_t(2*(EarthRadius() + TOA) / dl); |
---|
563 | if(maxtof < 0) tofcut = stopvalue + 1; |
---|
564 | else tofcut = Int_t(maxtof*Clight() / dl); |
---|
565 | while(true) { |
---|
566 | if(counter++ > tofcut) { |
---|
567 | #ifdef DEBUG |
---|
568 | //Msg(EsafMsg::Debug) <<"<InvertOzoneAmount> TOF cut reached : photon dumped here "<<MsgDispatch; |
---|
569 | #endif |
---|
570 | if(rtn.Mag() == 0) rtn = pos1; |
---|
571 | return 1; |
---|
572 | } |
---|
573 | if(counter > stopvalue) { |
---|
574 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> \"infinite\" loop (>2*EarthRadius travelled) broken by hand"<<MsgDispatch; |
---|
575 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> counter = "<<counter <<MsgDispatch; |
---|
576 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> Stop value = "<<stopvalue <<MsgDispatch; |
---|
577 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> maxtof = "<<maxtof <<MsgDispatch; |
---|
578 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> MCRT TOA = " << TOA <<MsgDispatch; |
---|
579 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> initpos = " << pos1 <<MsgDispatch; |
---|
580 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> initpos.Zv = " << pos1.Zv() <<MsgDispatch; |
---|
581 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> finalpos = " << EarthVector(pos1+inter) <<MsgDispatch; |
---|
582 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> finalpos.Zv = " << EarthVector(pos1+inter).Zv() <<MsgDispatch; |
---|
583 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> direc = " << direc <<MsgDispatch; |
---|
584 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> direc.theta = " << direc.Theta()*RadToDeg() <<MsgDispatch; |
---|
585 | Msg(EsafMsg::Warning) <<"<InvertOzoneAmount> direc.phi = " << direc.Phi()*RadToDeg() <<MsgDispatch; |
---|
586 | if(rtn.Mag() == 0) rtn = pos1; |
---|
587 | return 1; |
---|
588 | } |
---|
589 | inter += U*dl; |
---|
590 | h2 = inter.Zv(); |
---|
591 | DeltaT = Temperature(h2) - STP_Temperature(); |
---|
592 | rho2 = O3_DensityPPMV(h2) * C0 *(1 + C1*DeltaT + C2*DeltaT*DeltaT) * Pressure(h2) / Temperature(h2); |
---|
593 | dX = 0.5*(rho1 + rho2) * dl/km * 0.0269*STP_Temperature()/STP_Pressure(); |
---|
594 | if((X + dX) >= OzAmount) break; |
---|
595 | X += dX; |
---|
596 | rho1 = rho2; |
---|
597 | if((inter - impact).Mag() < dl) dl = (inter - impact).Mag(); |
---|
598 | } |
---|
599 | |
---|
600 | // come back to last iteration for fine tuning |
---|
601 | rtn = inter - U*dl; |
---|
602 | Double_t slope = (rho2 - rho1) / dl; // ozone amount profile considered linear locally |
---|
603 | if(slope) dl = sign(slope) * sqrt( (rho1/slope) * (rho1/slope) + 2.*(OzAmount - X) / (0.0269/km*STP_Temperature()/STP_Pressure()) / slope) - rho1/slope; |
---|
604 | else dl = (OzAmount - X) / (0.0269/km*STP_Temperature()/STP_Pressure()) / rho1; // if locally constant ozone amount profile |
---|
605 | rtn += U*dl; |
---|
606 | |
---|
607 | |
---|
608 | if(rtn.Mag() == 0) rtn = pos1; |
---|
609 | |
---|
610 | return 0; |
---|
611 | } |
---|
612 | |
---|
613 | //______________________________________________________________________________ |
---|
614 | EarthVector Atmosphere::ImpactASL(const EarthVector& pos, const EarthVector& dir) const { |
---|
615 | // |
---|
616 | // returns impact at sea level of a track defined by starting position and direction |
---|
617 | // |
---|
618 | |
---|
619 | // if pos is under sea level |
---|
620 | EarthVector rtn; |
---|
621 | if(pos.IsUnderSeaLevel()) { |
---|
622 | rtn.SetXYZ(0,0,-HUGE); |
---|
623 | return rtn; |
---|
624 | } |
---|
625 | |
---|
626 | |
---|
627 | // to know if dir is locally going upward |
---|
628 | Double_t angle; |
---|
629 | EarthVector temp(pos); |
---|
630 | temp(2) += EarthRadius(); // pos expressed in earth-centered frame -> gives local vertical direction expressed in MES frame |
---|
631 | angle = dir.Angle(temp); // angle between dir and local vertical |
---|
632 | if(angle < (PiOver2() - kTolerance)) { |
---|
633 | rtn.SetXYZ(0,0,HUGE); |
---|
634 | return rtn; |
---|
635 | } |
---|
636 | |
---|
637 | // now, impact calculation |
---|
638 | Double_t mag(0); |
---|
639 | EarthVector direc = dir.Unit(); |
---|
640 | |
---|
641 | /* |
---|
642 | // flat earth |
---|
643 | if(fabs(direc.Z()) < kTolerance) rtn.SetXYZ(0,0,HUGE); |
---|
644 | else { |
---|
645 | mag = -pos.Z() / direc.Z(); |
---|
646 | if(mag < -kAltitudeTolerance) rtn.SetXYZ(0,0,HUGE); |
---|
647 | else rtn = pos + mag*direc; |
---|
648 | } |
---|
649 | */ |
---|
650 | // spherical earth |
---|
651 | Double_t b = pos*direc + direc.Z()*EarthRadius(); |
---|
652 | Double_t c = pos.Mag2() + 2*EarthRadius()*pos.Z(); |
---|
653 | pair<Int_t,Double_t*>& p = findRoots(1.,2*b,c); |
---|
654 | if(p.first == 0) { |
---|
655 | rtn.SetXYZ(0,0,HUGE); |
---|
656 | return rtn; |
---|
657 | } |
---|
658 | if(p.first == 1) mag = p.second[0]; |
---|
659 | else if(p.first ==2) mag = min(p.second[0],p.second[1]); |
---|
660 | |
---|
661 | if(mag < -kAltitudeTolerance) Msg(EsafMsg::Debug) <<"SHOULD NOT HAVE IMPACT AT SEA LEVEL, mag = "<<mag << MsgDispatch; |
---|
662 | |
---|
663 | rtn = pos + mag*direc; |
---|
664 | return rtn; |
---|
665 | } |
---|
666 | |
---|
667 | //______________________________________________________________________________ |
---|
668 | EarthVector Atmosphere::ImpactAtTOA(const EarthVector& pos, const EarthVector& dir, Double_t TOA_alt) const { |
---|
669 | // |
---|
670 | // returns impact at Top Of Atmosphere of a track defined by starting position and direction |
---|
671 | // if 0 < TOA_alt < fTOA --> TOA_alt is used to make present calculation (to optimize CPU time, cf. InvertGrammage()) |
---|
672 | // |
---|
673 | |
---|
674 | // if pos is under sea level |
---|
675 | EarthVector rtn; |
---|
676 | if(pos.IsUnderSeaLevel()) { |
---|
677 | rtn.SetXYZ(0,0,-HUGE); |
---|
678 | return rtn; |
---|
679 | } |
---|
680 | |
---|
681 | // TOA settings |
---|
682 | Double_t altTOA = 0.; |
---|
683 | if( (0 < TOA_alt) && (TOA_alt < fTOA) ) altTOA = TOA_alt; |
---|
684 | else altTOA = fTOA; |
---|
685 | |
---|
686 | // now, impact calculation |
---|
687 | Double_t mag(0); |
---|
688 | EarthVector direc = dir.Unit(); |
---|
689 | |
---|
690 | /* |
---|
691 | // flat earth |
---|
692 | if(fabs(direc.Z()) < kTolerance) rtn.SetXYZ(0,0,HUGE); |
---|
693 | else { |
---|
694 | mag = (altTOA - pos.Z()) / direc.Z(); |
---|
695 | if(mag < -kAltitudeTolerance) rtn.SetXYZ(0,0,HUGE); |
---|
696 | else rtn = pos + mag*direc; |
---|
697 | } |
---|
698 | */ |
---|
699 | |
---|
700 | // spherical earth |
---|
701 | Double_t b = pos*direc + direc.Z()*EarthRadius(); |
---|
702 | Double_t c = pos.Mag2() + 2*EarthRadius()*(pos.Z() - altTOA) - pow(altTOA,2); |
---|
703 | pair<Int_t,Double_t*>& p = findRoots(1.,2*b,c); |
---|
704 | if(p.first == 0) { |
---|
705 | rtn.SetXYZ(0,0,HUGE); |
---|
706 | return rtn; |
---|
707 | } |
---|
708 | if(p.first == 1) mag = p.second[0]; |
---|
709 | else if(p.first == 2) { |
---|
710 | if((p.second[0]+kAltitudeTolerance) * (p.second[1]+kAltitudeTolerance) < 0) mag = max(p.second[0],p.second[1]); |
---|
711 | else mag = min(p.second[0],p.second[1]); |
---|
712 | } |
---|
713 | if(mag < -kAltitudeTolerance) { |
---|
714 | Msg(EsafMsg::Warning) << "PB in impact calculation ImpactAtTOA(), mag[min,max] = ["<<mag<<", "<< max(p.second[0],p.second[1])<<"]" << MsgDispatch; |
---|
715 | Msg(EsafMsg::Warning) << "pos = "<<pos << MsgDispatch; |
---|
716 | Msg(EsafMsg::Warning) << "dir = "<<direc << MsgDispatch; |
---|
717 | } |
---|
718 | rtn = pos + mag*direc; |
---|
719 | return rtn; |
---|
720 | } |
---|
721 | |
---|
722 | |
---|
723 | |
---|
724 | // used in reco only : obsolete, should use Grammage method |
---|
725 | //______________________________________________________________________________ |
---|
726 | Double_t Atmosphere::Depth(const Double_t H, const Double_t Theta) const { |
---|
727 | // Compute the atmosphere depth between the given point with (h,theta) coordinates and infinity |
---|
728 | // |
---|
729 | Double_t eps=1.e-5; |
---|
730 | TF1 *depthIntegral = new TF1("depthIntegral",densityIntegral,0.,1.,2); |
---|
731 | |
---|
732 | if (Theta <= TMath::PiOver2()) { |
---|
733 | Double_t pars[2] = {H,Theta}; |
---|
734 | Double_t depth = depthIntegral->Integral(eps,1-eps,pars,fDepthCalculationPrecision); |
---|
735 | delete depthIntegral; |
---|
736 | return depth; |
---|
737 | } |
---|
738 | else { |
---|
739 | Double_t Hstar = ( EarthRadius() + H)*TMath::Sin(TMath::Pi() - Theta ) - |
---|
740 | EarthRadius(); |
---|
741 | Double_t pars1[2] = {Hstar,TMath::PiOver2()}; |
---|
742 | Double_t pars2[2] = {H,TMath::Pi() - Theta}; |
---|
743 | Double_t depth=2*depthIntegral->Integral(eps,1-eps,pars1) - depthIntegral->Integral(eps,1-eps,pars2, |
---|
744 | fDepthCalculationPrecision); |
---|
745 | delete depthIntegral; |
---|
746 | return depth; |
---|
747 | } |
---|
748 | } |
---|
749 | |
---|