1 | // Part of BNC, a utility for retrieving decoding and
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2 | // converting GNSS data streams from NTRIP broadcasters.
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3 | //
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4 | // Copyright (C) 2007
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5 | // German Federal Agency for Cartography and Geodesy (BKG)
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6 | // http://www.bkg.bund.de
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7 | // Czech Technical University Prague, Department of Geodesy
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8 | // http://www.fsv.cvut.cz
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9 | //
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10 | // Email: euref-ip@bkg.bund.de
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11 | //
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12 | // This program is free software; you can redistribute it and/or
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13 | // modify it under the terms of the GNU General Public License
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14 | // as published by the Free Software Foundation, version 2.
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15 | //
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16 | // This program is distributed in the hope that it will be useful,
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17 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | // GNU General Public License for more details.
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20 | //
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21 | // You should have received a copy of the GNU General Public License
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22 | // along with this program; if not, write to the Free Software
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23 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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24 |
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25 | /* -------------------------------------------------------------------------
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26 | * BKG NTRIP Client
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27 | * -------------------------------------------------------------------------
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28 | *
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29 | * Class: bncPPPclient
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30 | *
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31 | * Purpose: Precise Point Positioning
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32 | *
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33 | * Author: L. Mervart
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34 | *
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35 | * Created: 21-Nov-2009
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36 | *
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37 | * Changes:
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38 | *
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39 | * -----------------------------------------------------------------------*/
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40 |
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41 | #include <newmatio.h>
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42 | #include <iomanip>
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43 | #include <sstream>
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44 |
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45 | #include "bncpppclient.h"
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46 | #include "bnccore.h"
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47 | #include "bncutils.h"
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48 | #include "bncconst.h"
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49 | #include "bncmodel.h"
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50 | #include "pppOptions.h"
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51 | #include "pppClient.h"
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52 |
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53 | using namespace BNC_PPP;
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54 | using namespace std;
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55 |
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56 | // Constructor
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57 | ////////////////////////////////////////////////////////////////////////////
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58 | bncPPPclient::bncPPPclient(QByteArray staID, const t_pppOptions* opt) : bncEphUser(false) {
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59 |
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60 | _opt = opt;
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61 | _staID = staID;
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62 | _model = new bncModel(this);
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63 | _epoData = new t_epoData();
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64 | }
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65 |
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66 | // Destructor
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67 | ////////////////////////////////////////////////////////////////////////////
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68 | bncPPPclient::~bncPPPclient() {
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69 | _epoData->clear();
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70 |
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71 | QMapIterator<QString, t_corr*> ic(_corr);
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72 | while (ic.hasNext()) {
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73 | ic.next();
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74 | delete ic.value();
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75 | }
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76 |
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77 | QMapIterator<QString, t_bias*> ib(_bias);
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78 | while (ib.hasNext()) {
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79 | ib.next();
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80 | delete ib.value();
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81 | }
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82 |
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83 | delete _model;
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84 | }
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85 |
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86 | //
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87 | ////////////////////////////////////////////////////////////////////////////
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88 | void bncPPPclient::processEpoch(const vector<t_satObs*>& satObs, t_output* output) {
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89 | QMutexLocker locker(&_mutex);
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90 |
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91 | // Convert and store observations
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92 | // ------------------------------
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93 | _epoData->clear();
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94 | for (unsigned ii = 0; ii < satObs.size(); ii++) {
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95 | const t_satObs* obs = satObs[ii];
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96 | t_satData* satData = new t_satData();
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97 | satData->tt = obs->_time;
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98 | satData->prn = QString(obs->_prn.toString().c_str());
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99 | satData->slipFlag = false;
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100 | satData->P1 = 0.0;
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101 | satData->P2 = 0.0;
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102 | satData->P5 = 0.0;
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103 | satData->L1 = 0.0;
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104 | satData->L2 = 0.0;
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105 | satData->L5 = 0.0;
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106 | for (unsigned ifrq = 0; ifrq < obs->_obs.size(); ifrq++) {
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107 | t_frqObs* frqObs = obs->_obs[ifrq];
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108 | if (frqObs->_rnxType2ch[0] == '1') {
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109 | if (frqObs->_codeValid) satData->P1 = frqObs->_code;
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110 | if (frqObs->_phaseValid) satData->L1 = frqObs->_phase;
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111 | if (frqObs->_slip) satData->slipFlag = true;
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112 | }
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113 | else if (frqObs->_rnxType2ch[0] == '2') {
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114 | if (frqObs->_codeValid) satData->P2 = frqObs->_code;
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115 | if (frqObs->_phaseValid) satData->L2 = frqObs->_phase;
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116 | if (frqObs->_slip) satData->slipFlag = true;
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117 | }
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118 | else if (frqObs->_rnxType2ch[0] == '5') {
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119 | if (frqObs->_codeValid) satData->P5 = frqObs->_code;
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120 | if (frqObs->_phaseValid) satData->L5 = frqObs->_phase;
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121 | if (frqObs->_slip) satData->slipFlag = true;
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122 | }
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123 | }
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124 | putNewObs(satData);
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125 | }
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126 |
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127 | // Data Pre-Processing
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128 | // -------------------
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129 | QMutableMapIterator<QString, t_satData*> it(_epoData->satData);
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130 | while (it.hasNext()) {
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131 | it.next();
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132 | QString prn = it.key();
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133 | t_satData* satData = it.value();
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134 |
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135 | if (cmpToT(satData) != success) {
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136 | delete satData;
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137 | it.remove();
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138 | continue;
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139 | }
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140 | }
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141 |
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142 | // Filter Solution
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143 | // ---------------
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144 | if (_model->update(_epoData) == success) {
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145 | output->_error = false;
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146 | output->_epoTime = _model->time();
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147 | output->_xyzRover[0] = _model->x();
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148 | output->_xyzRover[1] = _model->y();
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149 | output->_xyzRover[2] = _model->z();
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150 | output->_numSat = 0;
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151 | output->_pDop = 0.0;
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152 | }
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153 | else {
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154 | output->_error = true;
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155 | }
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156 |
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157 | output->_log = LOG.str();
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158 | }
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159 |
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160 | //
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161 | ////////////////////////////////////////////////////////////////////////////
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162 | void bncPPPclient::putNewObs(t_satData* satData) {
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163 |
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164 | // Set Observations GPS and Glonass
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165 | // --------------------------------
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166 | if (satData->system() == 'G' || satData->system() == 'R') {
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167 | if (satData->P1 != 0.0 && satData->P2 != 0.0 &&
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168 | satData->L1 != 0.0 && satData->L2 != 0.0 ) {
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169 |
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170 | int channel = 0;
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171 | if (satData->system() == 'R') {
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172 | // cerr << "not yet implemented" << endl;
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173 | // exit(0);
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174 | }
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175 |
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176 | t_frequency::type fType1 = t_lc::toFreq(satData->system(), t_lc::l1);
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177 | t_frequency::type fType2 = t_lc::toFreq(satData->system(), t_lc::l2);
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178 | double f1 = t_CST::freq(fType1, channel);
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179 | double f2 = t_CST::freq(fType2, channel);
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180 | double a1 = f1 * f1 / (f1 * f1 - f2 * f2);
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181 | double a2 = - f2 * f2 / (f1 * f1 - f2 * f2);
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182 | satData->P3 = a1 * satData->P1 + a2 * satData->P2;
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183 | satData->L3 = a1 * satData->L1 + a2 * satData->L2;
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184 | satData->lambda3 = a1 * t_CST::c / f1 + a2 * t_CST::c / f2;
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185 | _epoData->satData[satData->prn] = satData;
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186 | _epoData->tt = satData->tt;
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187 | }
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188 | else {
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189 | delete satData;
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190 | }
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191 | }
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192 |
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193 | // Set Observations Galileo
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194 | // ------------------------
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195 | else if (satData->system() == 'E') {
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196 | if (satData->P1 != 0.0 && satData->P5 != 0.0 &&
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197 | satData->L1 != 0.0 && satData->L5 != 0.0 ) {
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198 | double f1 = t_CST::freq(t_frequency::E1, 0);
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199 | double f5 = t_CST::freq(t_frequency::E5, 0);
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200 | double a1 = f1 * f1 / (f1 * f1 - f5 * f5);
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201 | double a5 = - f5 * f5 / (f1 * f1 - f5 * f5);
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202 | satData->P3 = a1 * satData->P1 + a5 * satData->P5;
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203 | satData->L3 = a1 * satData->L1 + a5 * satData->L5;
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204 | satData->lambda3 = a1 * t_CST::c / f1 + a5 * t_CST::c / f5;
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205 | _epoData->satData[satData->prn] = satData;
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206 | _epoData->tt = satData->tt;
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207 | }
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208 | else {
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209 | delete satData;
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210 | }
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211 | }
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212 | }
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213 |
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214 | //
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215 | ////////////////////////////////////////////////////////////////////////////
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216 | void bncPPPclient::putNewCorrections(QList<QString> corrList) {
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217 | QMutexLocker locker(&_mutex);
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218 |
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219 | // Check the Mountpoint (source of corrections)
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220 | // --------------------------------------------
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221 | if (!_opt->_corrMount.empty()) {
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222 | QMutableListIterator<QString> itm(corrList);
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223 | while (itm.hasNext()) {
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224 | QStringList hlp = itm.next().split(" ");
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225 | if (hlp.size() > 0) {
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226 | QString mountpoint = hlp[hlp.size()-1];
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227 | if (mountpoint != QString(_opt->_corrMount.c_str())) {
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228 | itm.remove();
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229 | }
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230 | }
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231 | }
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232 | }
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233 |
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234 | if (corrList.size() == 0) {
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235 | return;
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236 | }
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237 |
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238 | QListIterator<QString> it(corrList);
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239 | while (it.hasNext()) {
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240 | QString line = it.next();
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241 |
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242 | QTextStream in(&line);
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243 | int messageType;
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244 | int updateInterval;
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245 | int GPSweek;
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246 | double GPSweeks;
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247 | QString prn;
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248 | in >> messageType >> updateInterval >> GPSweek >> GPSweeks >> prn;
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249 |
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250 | if ( t_corr::relevantMessageType(messageType) ) {
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251 | t_corr* cc = 0;
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252 | if (_corr.contains(prn)) {
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253 | cc = _corr.value(prn);
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254 | }
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255 | else {
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256 | cc = new t_corr();
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257 | _corr[prn] = cc;
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258 | }
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259 | cc->readLine(line);
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260 | _corr_tt = cc->tClk;
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261 | }
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262 | else if ( messageType == BTYPE_GPS || messageType == BTYPE_GLONASS ) {
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263 | t_bias* bb = 0;
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264 | if (_bias.contains(prn)) {
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265 | bb = _bias.value(prn);
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266 | }
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267 | else {
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268 | bb = new t_bias();
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269 | _bias[prn] = bb;
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270 | }
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271 | bb->readLine(line);
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272 | }
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273 | }
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274 | }
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275 |
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276 | // Satellite Position
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277 | ////////////////////////////////////////////////////////////////////////////
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278 | t_irc bncPPPclient::getSatPos(const bncTime& tt, const QString& prn,
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279 | ColumnVector& xc, ColumnVector& vv) {
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280 |
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281 | const double MAXAGE = 120.0;
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282 |
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283 | if (_eph.contains(prn)) {
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284 |
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285 | if (_opt->useOrbClkCorr() && prn[0] != 'E') {
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286 | if (_corr.contains(prn)) {
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287 | t_corr* cc = _corr.value(prn);
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288 | if (cc->ready() && tt - cc->tClk < MAXAGE) {
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289 | t_eph* eLast = _eph.value(prn)->last;
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290 | t_eph* ePrev = _eph.value(prn)->prev;
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291 | if (eLast && eLast->IOD() == cc->iod) {
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292 | eLast->position(tt.gpsw(), tt.gpssec(), xc.data(), vv.data());
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293 | return applyCorr(tt, cc, xc, vv);
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294 | }
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295 | else if (ePrev && ePrev->IOD() == cc->iod) {
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296 | ePrev->position(tt.gpsw(), tt.gpssec(), xc.data(), vv.data());
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297 | return applyCorr(tt, cc, xc, vv);
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298 | }
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299 | }
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300 | }
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301 | }
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302 |
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303 | else {
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304 | t_eph* ee = _eph.value(prn)->last;
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305 | ee->position(tt.gpsw(), tt.gpssec(), xc.data(), vv.data());
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306 | return success;
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307 | }
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308 | }
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309 |
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310 | return failure;
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311 | }
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312 |
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313 | //
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314 | ////////////////////////////////////////////////////////////////////////////
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315 | t_irc bncPPPclient::applyCorr(const bncTime& tt, const t_corr* cc,
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316 | ColumnVector& xc, ColumnVector& vv) {
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317 |
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318 | double dtRao = tt - cc->tRao;
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319 |
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320 | // Position
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321 | // --------
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322 | ColumnVector raoHlp = cc->rao + cc->dotRao * dtRao;
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323 |
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324 | if (raoHlp.norm_Frobenius() > 20.0) {
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325 | return failure;
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326 | }
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327 |
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328 | ColumnVector dx(3);
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329 | RSW_to_XYZ(xc.Rows(1,3), vv, raoHlp, dx);
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330 | xc[0] -= dx[0];
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331 | xc[1] -= dx[1];
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332 | xc[2] -= dx[2];
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333 |
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334 | // Velocity
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335 | // --------
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336 | ColumnVector dotRaoHlp = cc->dotRao;
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337 |
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338 | ColumnVector dv(3);
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339 | RSW_to_XYZ(xc.Rows(1,3), vv, dotRaoHlp, dv);
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340 | vv[0] -= dv[0];
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341 | vv[1] -= dv[1];
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342 | vv[2] -= dv[2];
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343 |
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344 | // Clocks
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345 | // ------
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346 | double dtClk = tt - cc->tClk;
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347 |
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348 | xc[3] += cc->dClk + cc->dotDClk * dtClk + cc->dotDotDClk * dtClk * dtClk
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349 | + cc->hrClk;
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350 |
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351 | return success;
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352 | }
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353 |
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354 | // Correct Time of Transmission
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355 | ////////////////////////////////////////////////////////////////////////////
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356 | t_irc bncPPPclient::cmpToT(t_satData* satData) {
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357 |
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358 | double prange = satData->P3;
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359 | if (prange == 0.0) {
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360 | return failure;
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361 | }
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362 |
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363 | double clkSat = 0.0;
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364 | for (int ii = 1; ii <= 10; ii++) {
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365 |
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366 | bncTime ToT = satData->tt - prange / t_CST::c - clkSat;
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367 |
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368 | ColumnVector xc(4);
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369 | ColumnVector vv(3);
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370 | if (getSatPos(ToT, satData->prn, xc, vv) != success) {
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371 | return failure;
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372 | }
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373 |
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374 | double clkSatOld = clkSat;
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375 | clkSat = xc(4);
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376 |
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377 | if ( fabs(clkSat-clkSatOld) * t_CST::c < 1.e-4 ) {
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378 | satData->xx = xc.Rows(1,3);
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379 | satData->vv = vv;
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380 | satData->clk = clkSat * t_CST::c;
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381 | return success;
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382 | }
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383 | }
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384 |
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385 | return failure;
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386 | }
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387 |
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