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: t_pppSatObs
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30 | *
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31 | * Purpose: Satellite observations
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32 | *
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33 | * Author: L. Mervart
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34 | *
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35 | * Created: 29-Jul-2014
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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 |
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42 | #include <iostream>
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43 | #include <cmath>
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44 | #include <newmatio.h>
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45 |
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46 | #include "pppSatObs.h"
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47 | #include "bncconst.h"
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48 | #include "pppEphPool.h"
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49 | #include "pppStation.h"
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50 | #include "bncutils.h"
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51 | #include "bncantex.h"
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52 | #include "pppObsPool.h"
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53 | #include "pppClient.h"
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54 |
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55 | using namespace BNC_PPP;
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56 | using namespace std;
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57 |
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58 | // Constructor
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59 | ////////////////////////////////////////////////////////////////////////////
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60 | t_pppSatObs::t_pppSatObs(const t_satObs& pppSatObs) {
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61 | _prn = pppSatObs._prn;
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62 | _time = pppSatObs._time;
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63 | _outlier = false;
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64 | _valid = true;
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65 | for (unsigned ii = 0; ii < t_frequency::max; ii++) {
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66 | _obs[ii] = 0;
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67 | }
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68 | prepareObs(pppSatObs);
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69 | }
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70 |
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71 | // Destructor
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72 | ////////////////////////////////////////////////////////////////////////////
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73 | t_pppSatObs::~t_pppSatObs() {
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74 | for (unsigned iFreq = 1; iFreq < t_frequency::max; iFreq++) {
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75 | delete _obs[iFreq];
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76 | }
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77 | }
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78 |
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79 | //
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80 | ////////////////////////////////////////////////////////////////////////////
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81 | void t_pppSatObs::prepareObs(const t_satObs& pppSatObs) {
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82 |
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83 | _model.reset();
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84 |
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85 | // Select pseudoranges and phase observations
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86 | // ------------------------------------------
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87 | const string preferredAttrib = "CWP_";
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88 |
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89 | for (unsigned iFreq = 1; iFreq < t_frequency::max; iFreq++) {
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90 | string frqNum = t_frequency::toString(t_frequency::type(iFreq)).substr(1);
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91 | for (unsigned iPref = 0; iPref < preferredAttrib.length(); iPref++) {
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92 | string obsType = (preferredAttrib[iPref] == '_') ? frqNum : frqNum + preferredAttrib[iPref];
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93 | if (_obs[iFreq] == 0) {
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94 | for (unsigned ii = 0; ii < pppSatObs._obs.size(); ii++) {
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95 | const t_frqObs* obs = pppSatObs._obs[ii];
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96 | if (obs->_rnxType2ch == obsType && obs->_codeValid && obs->_phaseValid) {
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97 | _obs[iFreq] = new t_frqObs(*obs);
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98 | _obs[iFreq]->_freqType = t_frequency::type(iFreq);
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99 | }
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100 | }
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101 | }
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102 | }
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103 | }
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104 |
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105 | // Used frequency types
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106 | // --------------------
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107 | _fType1 = t_lc::toFreq(_prn.system(),t_lc::l1);
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108 | _fType2 = t_lc::toFreq(_prn.system(),t_lc::l2);
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109 |
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110 | // Check whether all required frequencies available
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111 | // ------------------------------------------------
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112 | for (unsigned ii = 0; ii < OPT->LCs(_prn.system()).size(); ii++) {
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113 | t_lc::type tLC = OPT->LCs(_prn.system())[ii];
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114 | if (!isValid(tLC)) {
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115 | _valid = false;
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116 | return;
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117 | }
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118 | }
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119 |
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120 | // Find Glonass Channel Number
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121 | // ---------------------------
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122 | if (_prn.system() == 'R') {
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123 | _channel = PPP_CLIENT->ephPool()->getChannel(_prn);
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124 | }
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125 | else {
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126 | _channel = 0;
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127 | }
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128 |
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129 | // Compute Satellite Coordinates at Time of Transmission
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130 | // -----------------------------------------------------
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131 | _xcSat.ReSize(4); _xcSat = 0.0;
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132 | _vvSat.ReSize(4); _vvSat = 0.0;
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133 | bool totOK = false;
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134 | ColumnVector satPosOld(4); satPosOld = 0.0;
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135 | t_lc::type tLC = isValid(t_lc::cIF) ? t_lc::cIF : t_lc::c1;
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136 | double prange = obsValue(tLC);
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137 | for (int ii = 1; ii <= 10; ii++) {
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138 | bncTime ToT = _time - prange / t_CST::c - _xcSat[3];
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139 | if (PPP_CLIENT->ephPool()->getCrd(_prn, ToT, _xcSat, _vvSat) != success) {
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140 | _valid = false;
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141 | return;
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142 | }
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143 | ColumnVector dx = _xcSat - satPosOld;
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144 | dx[3] *= t_CST::c;
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145 | if (dx.norm_Frobenius() < 1.e-4) {
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146 | totOK = true;
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147 | break;
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148 | }
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149 | satPosOld = _xcSat;
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150 | }
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151 | if (totOK) {
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152 | _model._satClkM = _xcSat[3] * t_CST::c;
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153 | }
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154 | else {
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155 | _valid = false;
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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 | ////////////////////////////////////////////////////////////////////////////
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161 | void t_pppSatObs::lcCoeff(t_lc::type tLC,
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162 | map<t_frequency::type, double>& codeCoeff,
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163 | map<t_frequency::type, double>& phaseCoeff) const {
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164 |
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165 | codeCoeff.clear();
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166 | phaseCoeff.clear();
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167 |
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168 | double f1 = t_CST::freq(_fType1, _channel);
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169 | double f2 = t_CST::freq(_fType2, _channel);
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170 |
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171 | switch (tLC) {
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172 | case t_lc::l1:
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173 | phaseCoeff[_fType1] = 1.0;
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174 | return;
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175 | case t_lc::l2:
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176 | phaseCoeff[_fType2] = 1.0;
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177 | return;
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178 | case t_lc::lIF:
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179 | phaseCoeff[_fType1] = f1 * f1 / (f1 * f1 - f2 * f2);
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180 | phaseCoeff[_fType2] = -f2 * f2 / (f1 * f1 - f2 * f2);
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181 | return;
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182 | case t_lc::MW:
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183 | phaseCoeff[_fType1] = f1 / (f1 - f2);
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184 | phaseCoeff[_fType2] = -f2 / (f1 - f2);
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185 | codeCoeff[_fType1] = -f1 / (f1 + f2);
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186 | codeCoeff[_fType2] = -f2 / (f1 + f2);
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187 | return;
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188 | case t_lc::CL:
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189 | phaseCoeff[_fType1] = 0.5;
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190 | codeCoeff[_fType1] = 0.5;
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191 | return;
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192 | case t_lc::c1:
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193 | codeCoeff[_fType1] = 1.0;
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194 | return;
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195 | case t_lc::c2:
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196 | codeCoeff[_fType2] = 1.0;
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197 | return;
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198 | case t_lc::cIF:
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199 | codeCoeff[_fType1] = f1 * f1 / (f1 * f1 - f2 * f2);
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200 | codeCoeff[_fType2] = -f2 * f2 / (f1 * f1 - f2 * f2);
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201 | return;
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202 | case t_lc::dummy:
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203 | case t_lc::maxLc:
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204 | return;
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205 | }
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206 | }
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207 |
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208 | //
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209 | ////////////////////////////////////////////////////////////////////////////
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210 | bool t_pppSatObs::isValid(t_lc::type tLC) const {
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211 | bool valid = true;
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212 | obsValue(tLC, &valid);
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213 | return valid;
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214 | }
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215 | //
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216 | ////////////////////////////////////////////////////////////////////////////
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217 | double t_pppSatObs::obsValue(t_lc::type tLC, bool* valid) const {
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218 |
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219 | map<t_frequency::type, double> codeCoeff;
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220 | map<t_frequency::type, double> phaseCoeff;
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221 | lcCoeff(tLC, codeCoeff, phaseCoeff);
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222 |
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223 | double retVal = 0.0;
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224 | if (valid) *valid = true;
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225 |
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226 | map<t_frequency::type, double>::const_iterator it;
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227 | for (it = codeCoeff.begin(); it != codeCoeff.end(); it++) {
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228 | t_frequency::type tFreq = it->first;
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229 | if (_obs[tFreq] == 0) {
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230 | if (valid) *valid = false;
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231 | return 0.0;
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232 | }
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233 | else {
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234 | retVal += _obs[tFreq]->_code * it->second;
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235 | }
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236 | }
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237 | for (it = phaseCoeff.begin(); it != phaseCoeff.end(); it++) {
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238 | t_frequency::type tFreq = it->first;
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239 | if (_obs[tFreq] == 0) {
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240 | if (valid) *valid = false;
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241 | return 0.0;
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242 | }
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243 | else {
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244 | retVal += _obs[tFreq]->_phase * it->second;
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245 | }
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246 | }
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247 |
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248 | return retVal;
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249 | }
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250 |
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251 |
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252 | //
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253 | ////////////////////////////////////////////////////////////////////////////
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254 | t_irc t_pppSatObs::cmpModel(const t_pppStation* station) {
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255 |
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256 | // Reset all model values
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257 | // ----------------------
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258 | _model.reset();
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259 |
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260 | // Topocentric Satellite Position
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261 | // ------------------------------
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262 | ColumnVector rSat = _xcSat.Rows(1,3);
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263 | ColumnVector rhoV = rSat - station->xyzApr();
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264 | _model._rho = rhoV.norm_Frobenius();
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265 |
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266 | ColumnVector neu(3);
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267 | xyz2neu(station->ellApr().data(), rhoV.data(), neu.data());
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268 |
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269 | _model._eleSat = acos( sqrt(neu[0]*neu[0] + neu[1]*neu[1]) / _model._rho );
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270 | if (neu[2] < 0) {
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271 | _model._eleSat *= -1.0;
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272 | }
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273 | _model._azSat = atan2(neu[1], neu[0]);
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274 |
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275 | // Satellite Clocks
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276 | // ----------------
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277 | _model._satClkM = _xcSat[3] * t_CST::c;
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278 |
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279 | // Receiver Clocks
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280 | // ---------------
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281 | _model._recClkM = station->dClk() * t_CST::c;
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282 |
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283 | // Sagnac Effect (correction due to Earth rotation)
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284 | // ------------------------------------------------
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285 | ColumnVector Omega(3);
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286 | Omega[0] = 0.0;
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287 | Omega[1] = 0.0;
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288 | Omega[2] = t_CST::omega / t_CST::c;
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289 | _model._sagnac = DotProduct(Omega, crossproduct(rSat, station->xyzApr()));
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290 |
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291 | // Antenna Eccentricity
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292 | // --------------------
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293 | _model._antEcc = -DotProduct(station->xyzEcc(), rhoV) / _model._rho;
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294 |
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295 | // Antenna Phase Center Offsets and Variations
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296 | // -------------------------------------------
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297 | if (PPP_CLIENT->antex()) {
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298 | bool found;
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299 | _model._antPco1 = PPP_CLIENT->antex()->rcvCorr(station->antName(), _model._eleSat, found);
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300 | _model._antPco2 = _model._antPco1;
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301 | }
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302 |
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303 | // Tropospheric Delay
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304 | // ------------------
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305 | _model._tropo = t_tropo::delay_saast(station->xyzApr(), _model._eleSat);
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306 |
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307 | // Phase Wind-Up
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308 | // -------------
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309 | _model._windUp = station->windUp(_time, _prn, rSat);
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310 |
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311 | // Code (and Phase) Biases
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312 | // -----------------------
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313 | const t_satBias* satBias = PPP_CLIENT->obsPool()->satBias(_prn);
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314 | if (satBias) {
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315 | for (unsigned ii = 0; ii < satBias->_bias.size(); ii++) {
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316 | const t_frqBias& bias = satBias->_bias[ii];
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317 | if (_validObs1 && _validObs1->_rnxType2ch == bias._rnxType2ch) {
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318 | _validObs1->_biasJumpCounter = satBias->_jumpCount;
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319 | if (bias._codeValid) {
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320 | _model._biasC1 = bias._code;
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321 | }
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322 | if (bias._phaseValid) {
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323 | _model._biasL1 = bias._phase;
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324 | }
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325 | }
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326 | if (_validObs2 && _validObs2->_rnxType2ch == bias._rnxType2ch) {
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327 | _validObs2->_biasJumpCounter = satBias->_jumpCount;
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328 | if (bias._codeValid) {
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329 | _model._biasC2 = bias._code;
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330 | }
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331 | if (bias._phaseValid) {
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332 | _model._biasL2 = bias._phase;
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333 | }
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334 | }
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335 | }
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336 | }
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337 |
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338 | // Tidal Correction
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339 | // ----------------
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340 | _model._tide = -DotProduct(station->tideDspl(), rhoV) / _model._rho;
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341 |
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342 | // Ionospheric Delay
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343 | // -----------------
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344 | // TODO
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345 |
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346 | // Ocean Loading
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347 | // -------------
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348 | // TODO
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349 |
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350 | // Set Model Set Flag
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351 | // ------------------
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352 | _model._set = true;
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353 |
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354 | return success;
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355 | }
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356 |
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357 | //
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358 | ////////////////////////////////////////////////////////////////////////////
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359 | void t_pppSatObs::printModel() const {
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360 | LOG.setf(ios::fixed);
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361 | LOG << "MODEL for Satellite " << _prn.toString() << endl
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362 | << "RHO: " << setw(12) << setprecision(3) << _model._rho << endl
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363 | << "ELE: " << setw(12) << setprecision(3) << _model._eleSat * 180.0 / M_PI << endl
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364 | << "AZI: " << setw(12) << setprecision(3) << _model._azSat * 180.0 / M_PI << endl
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365 | << "SATCLK: " << setw(12) << setprecision(3) << _model._satClkM << endl
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366 | << "RECCLK: " << setw(12) << setprecision(3) << _model._recClkM << endl
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367 | << "SAGNAC: " << setw(12) << setprecision(3) << _model._sagnac << endl
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368 | << "ANTECC: " << setw(12) << setprecision(3) << _model._antEcc << endl
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369 | << "PCO1: " << setw(12) << setprecision(3) << _model._antPco1 << endl
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370 | << "PCO2: " << setw(12) << setprecision(3) << _model._antPco2 << endl
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371 | << "TROPO: " << setw(12) << setprecision(3) << _model._tropo << endl
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372 | << "WINDUP: " << setw(12) << setprecision(3) << _model._windUp << endl
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373 | << "BIASC1: " << setw(12) << setprecision(3) << _model._biasC1 << endl
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374 | << "BIASC2: " << setw(12) << setprecision(3) << _model._biasC2 << endl
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375 | << "BIASL1: " << setw(12) << setprecision(3) << _model._biasL1 << endl
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376 | << "BIASL2: " << setw(12) << setprecision(3) << _model._biasL2 << endl
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377 | << "TIDES: " << setw(12) << setprecision(3) << _model._tide << endl;
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378 |
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379 | //// beg test
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380 | LOG << "PCO L3: " << setw(12) << setprecision(3)
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381 | << lc(t_lc::lIF, _model._antPco1, _model._antPco2, 0.0, 0.0) << endl;
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382 |
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383 | LOG << "WIND L3:" << setw(12) << setprecision(3)
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384 | << lc(t_lc::lIF, _model._windUp * t_CST::c / _f1,
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385 | _model._windUp * t_CST::c / _f2, 0.0, 0.0) << endl;
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386 |
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387 | LOG << "OBS-CMP P3: " << _prn.toString() << " "
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388 | << setw(12) << setprecision(3) << obsValue(t_lc::cIF) << " "
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389 | << setw(12) << setprecision(3) << cmpValue(t_lc::cIF) << " "
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390 | << setw(12) << setprecision(3) << obsValue(t_lc::cIF) - cmpValue(t_lc::cIF) << endl;
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391 |
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392 | LOG << "OBS-CMP L3: " << _prn.toString() << " "
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393 | << setw(12) << setprecision(3) << obsValue(t_lc::lIF) << " "
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394 | << setw(12) << setprecision(3) << cmpValue(t_lc::lIF) << " "
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395 | << setw(12) << setprecision(3) << obsValue(t_lc::lIF) - cmpValue(t_lc::lIF) << endl;
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396 |
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397 | LOG << "OBS-CMP MW: " << _prn.toString() << " "
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398 | << setw(12) << setprecision(3) << obsValue(t_lc::MW) << " "
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399 | << setw(12) << setprecision(3) << cmpValue(t_lc::MW) << " "
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400 | << setw(12) << setprecision(3) << obsValue(t_lc::MW) - cmpValue(t_lc::MW) << endl;
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401 | //// end test
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402 | }
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403 |
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404 | //
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405 | ////////////////////////////////////////////////////////////////////////////
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406 | double t_pppSatObs::cmpValueForBanc(t_lc::type tLC) const {
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407 | return cmpValue(tLC) - _model._rho - _model._sagnac - _model._recClkM;
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408 | }
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409 |
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410 | //
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411 | ////////////////////////////////////////////////////////////////////////////
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412 | double t_pppSatObs::cmpValue(t_lc::type tLC) const {
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413 |
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414 | if (!_validObs2 && t_lc::need2ndFreq(tLC)) {
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415 | return 0.0;
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416 | }
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417 |
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418 | // Non-Dispersive Part
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419 | // -------------------
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420 | double nonDisp = _model._rho + _model._recClkM - _model._satClkM
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421 | + _model._sagnac + _model._antEcc + _model._tropo
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422 | + _model._tide;
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423 |
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424 | // Add Dispersive Part
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425 | // -------------------
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426 | double L1 = nonDisp + _model._antPco1 - _model._biasL1 + _model._windUp * t_CST::c / _f1;
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427 | double L2 = nonDisp + _model._antPco2 - _model._biasL2 + _model._windUp * t_CST::c / _f2;
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428 | double C1 = nonDisp + _model._antPco1 - _model._biasC1;
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429 | double C2 = nonDisp + _model._antPco2 - _model._biasC2;
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430 |
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431 | return this->lc(tLC, L1, L2, C1, C2);
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432 | }
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433 |
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434 | //
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435 | ////////////////////////////////////////////////////////////////////////////
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436 | double t_pppSatObs::lambda(t_lc::type tLC) const {
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437 |
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438 | if (tLC == t_lc::l1) {
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439 | return t_CST::c / _f1;
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440 | }
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441 | else if (tLC == t_lc::l2) {
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442 | return t_CST::c / _f2;
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443 | }
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444 | else if (tLC == t_lc::lIF) {
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445 | return t_CST::c / (_f1 + _f2);
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446 | }
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447 | else if (tLC == t_lc::MW) {
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448 | return t_CST::c / (_f1 - _f2);
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449 | }
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450 | else if (tLC == t_lc::CL) {
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451 | return t_CST::c / _f1 / 2.0;
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452 | }
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453 |
|
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454 | return 0.0;
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455 | }
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456 |
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457 | //
|
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458 | ////////////////////////////////////////////////////////////////////////////
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459 | double t_pppSatObs::sigma(t_lc::type tLC) const {
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460 |
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461 | ColumnVector sig(4);
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462 | sig(1) = OPT->_sigmaL1;
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463 | sig(2) = OPT->_sigmaL1;
|
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464 | sig(3) = OPT->_sigmaC1;
|
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465 | sig(4) = OPT->_sigmaC1;
|
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466 |
|
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467 | ColumnVector coeff(4);
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468 | lc(tLC, sig(1), sig(2), sig(3), sig(4), &coeff);
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469 |
|
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470 | ColumnVector sp = SP(sig, coeff); // Schur product
|
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471 |
|
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472 | // Elevation-Dependent Weighting
|
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473 | // -----------------------------
|
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474 | double cEle = 1.0;
|
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475 | if ( (OPT->_eleWgtCode && t_lc::includesCode(tLC)) ||
|
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476 | (OPT->_eleWgtPhase && t_lc::includesPhase(tLC)) ) {
|
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477 | double eleD = eleSat()*180.0/M_PI;
|
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478 | double hlp = fabs(90.0 - eleD);
|
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479 | cEle = (1.0 + hlp*hlp*hlp*0.000004);
|
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480 | }
|
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481 |
|
---|
482 | return cEle * sp.norm_Frobenius();
|
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483 | }
|
---|
484 |
|
---|
485 | //
|
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486 | ////////////////////////////////////////////////////////////////////////////
|
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487 | double t_pppSatObs::maxRes(t_lc::type tLC) const {
|
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488 |
|
---|
489 | ColumnVector res(4);
|
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490 | res(1) = OPT->_maxResL1;
|
---|
491 | res(2) = OPT->_maxResL1;
|
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492 | res(3) = OPT->_maxResC1;
|
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493 | res(4) = OPT->_maxResC1;
|
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494 |
|
---|
495 | ColumnVector coeff(4);
|
---|
496 | lc(tLC, res(1), res(2), res(3), res(4), &coeff);
|
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497 |
|
---|
498 | ColumnVector sp = SP(res, coeff); // Schur product
|
---|
499 |
|
---|
500 | return sp.norm_Frobenius();
|
---|
501 | }
|
---|
502 |
|
---|
503 | //
|
---|
504 | ////////////////////////////////////////////////////////////////////////////
|
---|
505 | void t_pppSatObs::setRes(t_lc::type tLC, double res) {
|
---|
506 | _res[tLC] = res;
|
---|
507 | }
|
---|
508 |
|
---|
509 | //
|
---|
510 | ////////////////////////////////////////////////////////////////////////////
|
---|
511 | double t_pppSatObs::getRes(t_lc::type tLC) const {
|
---|
512 | map<t_lc::type, double>::const_iterator it = _res.find(tLC);
|
---|
513 | if (it != _res.end()) {
|
---|
514 | return it->second;
|
---|
515 | }
|
---|
516 | else {
|
---|
517 | return 0.0;
|
---|
518 | }
|
---|
519 | }
|
---|