[297] | 1 | // Part of BNC, a utility for retrieving decoding and
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[464] | 2 | // converting GNSS data streams from NTRIP broadcasters.
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[297] | 3 | //
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[464] | 4 | // Copyright (C) 2007
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[297] | 5 | // German Federal Agency for Cartography and Geodesy (BKG)
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| 6 | // http://www.bkg.bund.de
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[464] | 7 | // Czech Technical University Prague, Department of Geodesy
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[297] | 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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[296] | 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: RTCM3Decoder
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| 30 | *
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| 31 | * Purpose: RTCM3 Decoder
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| 32 | *
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| 33 | * Author: L. Mervart
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| 34 | *
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| 35 | * Created: 24-Aug-2006
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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 <iostream>
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| 42 | #include <math.h>
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[585] | 43 | #include <string.h>
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[296] | 44 |
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| 45 | #include "RTCM3Decoder.h"
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[880] | 46 | #include "RTCM3coDecoder.h"
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[296] | 47 | #include "bncconst.h"
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[511] | 48 | #include "bncapp.h"
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[1035] | 49 | #include "bncutils.h" /* Weber, for latencies */
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[296] | 50 |
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| 51 | using namespace std;
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| 52 |
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| 53 | #ifndef isinf
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| 54 | # define isinf(x) 0
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| 55 | #endif
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| 56 |
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[320] | 57 | // Error Handling
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| 58 | ////////////////////////////////////////////////////////////////////////////
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[504] | 59 | void RTCM3Error(const char*, ...) {
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[505] | 60 | }
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[320] | 61 |
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[296] | 62 | // Constructor
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| 63 | ////////////////////////////////////////////////////////////////////////////
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[970] | 64 | RTCM3Decoder::RTCM3Decoder(const QString& staID) : GPSDecoder() {
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[505] | 65 |
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| 66 | const int LEAPSECONDS = 14; /* only needed for approx. time */
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| 67 |
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[1033] | 68 | QSettings settings;
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| 69 | _checkMountPoint = settings.value("messTypes").toString();
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[1035] | 70 | _corrLate = settings.value("corrLate").toInt();
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[1022] | 71 | _staID = staID;
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| 72 |
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| 73 | // Ensure, that the Decoder uses the "old" convention for the data structure for Rinex2. Perlt
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[689] | 74 | _Parser.rinex3 = 0;
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| 75 |
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[296] | 76 | time_t tim;
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| 77 | tim = time(0) - ((10*365+2+5)*24*60*60 + LEAPSECONDS);
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[505] | 78 |
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| 79 | memset(&_Parser, 0, sizeof(_Parser));
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[296] | 80 | _Parser.GPSWeek = tim/(7*24*60*60);
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| 81 | _Parser.GPSTOW = tim%(7*24*60*60);
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[880] | 82 |
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[939] | 83 | connect(this, SIGNAL(newGPSEph(gpsephemeris*)),
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| 84 | (bncApp*) qApp, SLOT(slotNewGPSEph(gpsephemeris*)));
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| 85 | connect(this, SIGNAL(newGlonassEph(glonassephemeris*)),
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| 86 | (bncApp*) qApp, SLOT(slotNewGlonassEph(glonassephemeris*)));
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| 87 |
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[880] | 88 | // Sub-Decoder for Clock and Orbit Corrections
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| 89 | // -------------------------------------------
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[970] | 90 | _coDecoder = new RTCM3coDecoder(staID);
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[1021] | 91 |
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| 92 | // Mode can be either observations or corrections
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| 93 | // ----------------------------------------------
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| 94 | _mode = unknown;
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[296] | 95 | }
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| 96 |
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| 97 | // Destructor
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| 98 | ////////////////////////////////////////////////////////////////////////////
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| 99 | RTCM3Decoder::~RTCM3Decoder() {
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[880] | 100 | delete _coDecoder;
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[296] | 101 | }
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| 102 |
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| 103 | //
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| 104 | ////////////////////////////////////////////////////////////////////////////
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[649] | 105 | t_irc RTCM3Decoder::Decode(char* buffer, int bufLen) {
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[508] | 106 |
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[913] | 107 | bool decoded = false;
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| 108 |
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[880] | 109 | // Try to decode Clock and Orbit Corrections
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| 110 | // -----------------------------------------
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[1021] | 111 | if (_mode == unknown || _mode == corrections) {
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| 112 | if ( _coDecoder->Decode(buffer, bufLen) == success ) {
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| 113 | decoded = true;
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[1035] | 114 |
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| 115 | // Latency, Weber
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| 116 | // -------
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| 117 | if ( _corrLate == 2 ) {
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| 118 | if (0<_coDecoder->_epochList.size()) {
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| 119 | for (int ii=0;ii<_coDecoder->_epochList.size();ii++) {
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| 120 | int week;
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| 121 | double sec;
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| 122 | double secGPS = _coDecoder->_epochList[ii];
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| 123 | leapsecGPSWeeks(week, sec);
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| 124 | double dt = fabs(sec - secGPS);
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| 125 | const double secPerWeek = 7.0 * 24.0 * 3600.0;
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| 126 | if (dt > 0.5 * secPerWeek) {
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| 127 | if (sec > secGPS) {
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| 128 | sec -= secPerWeek;
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| 129 | } else {
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| 130 | sec += secPerWeek;
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| 131 | }
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| 132 | }
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| 133 | QString late;
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| 134 | late = QString("%1 ").arg(int((sec - secGPS)*100.)/100.);
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| 135 | if (late != "") {
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| 136 | emit(newMessage(QString(_staID + ": Latency " + late + "sec").toAscii() ) );
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| 137 | }
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| 138 | }
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| 139 | }
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| 140 | }
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| 141 | _coDecoder->_epochList.clear();
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| 142 |
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[1021] | 143 | if (_mode == unknown) {
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| 144 | _mode = corrections;
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[1033] | 145 | // emit(newMessage( (_staID + " : mode set to corrections").toAscii() ));
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[1021] | 146 | }
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| 147 | }
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[913] | 148 | }
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[880] | 149 |
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| 150 | // Remaining part decodes the Observations
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| 151 | // ---------------------------------------
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[1033] | 152 | if (_mode == unknown || _mode == observations || _checkMountPoint == _staID || _checkMountPoint == "ALL") {
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[1021] | 153 | for (int ii = 0; ii < bufLen; ii++) {
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| 154 |
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| 155 | _Parser.Message[_Parser.MessageSize++] = buffer[ii];
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| 156 | if (_Parser.MessageSize >= _Parser.NeedBytes) {
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| 157 |
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[1030] | 158 | // RTCM message types
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| 159 | // ------------------
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| 160 | for (int kk = 0; kk < _Parser.typeSize; kk++) {
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| 161 | _typeList.push_back(_Parser.typeList[kk]);
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| 162 | }
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| 163 | _Parser.typeSize = 0;
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[1021] | 164 |
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[1033] | 165 | while(int rr = RTCM3Parser(&_Parser)) {
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| 166 |
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[1021] | 167 | // GNSS Observations
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| 168 | // -----------------
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| 169 | if (rr == 1 || rr == 2) {
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| 170 | decoded = true;
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| 171 |
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| 172 | if (!_Parser.init) {
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| 173 | HandleHeader(&_Parser);
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| 174 | _Parser.init = 1;
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| 175 | }
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| 176 |
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| 177 | if (rr == 2) {
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[1033] | 178 | // std::cerr << "No valid RINEX! All values are modulo 299792.458!\n";
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| 179 | emit(newMessage( (_staID + ": No valid RINEX! All values are modulo 299792.458!").toAscii() ));
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[1021] | 180 | }
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| 181 |
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| 182 | for (int ii = 0; ii < _Parser.Data.numsats; ii++) {
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| 183 | p_obs obs = new t_obs();
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| 184 | _obsList.push_back(obs);
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| 185 | if (_Parser.Data.satellites[ii] <= PRN_GPS_END) {
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| 186 | obs->_o.satSys = 'G';
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| 187 | obs->_o.satNum = _Parser.Data.satellites[ii];
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[366] | 188 | }
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[1021] | 189 | else if (_Parser.Data.satellites[ii] <= PRN_GLONASS_END) {
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| 190 | obs->_o.satSys = 'R';
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| 191 | obs->_o.satNum = _Parser.Data.satellites[ii] - PRN_GLONASS_START + 1;
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| 192 | }
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[511] | 193 | else {
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[1021] | 194 | obs->_o.satSys = 'S';
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| 195 | obs->_o.satNum = _Parser.Data.satellites[ii] - PRN_WAAS_START + 20;
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| 196 | }
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| 197 | obs->_o.GPSWeek = _Parser.Data.week;
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| 198 | obs->_o.GPSWeeks = _Parser.Data.timeofweek / 1000.0;
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| 199 |
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| 200 | for (int jj = 0; jj < _Parser.numdatatypesGPS; jj++) {
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| 201 | int v = 0;
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| 202 | // sepearated declaration and initalization of df and pos. Perlt
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| 203 | int df;
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| 204 | int pos;
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| 205 | df = _Parser.dataflag[jj];
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| 206 | pos = _Parser.datapos[jj];
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[511] | 207 | if ( (_Parser.Data.dataflags[ii] & df)
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| 208 | && !isnan(_Parser.Data.measdata[ii][pos])
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| 209 | && !isinf(_Parser.Data.measdata[ii][pos])) {
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[1021] | 210 | v = 1;
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[511] | 211 | }
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[1021] | 212 | else {
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| 213 | df = _Parser.dataflagGPS[jj];
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| 214 | pos = _Parser.dataposGPS[jj];
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| 215 | if ( (_Parser.Data.dataflags[ii] & df)
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| 216 | && !isnan(_Parser.Data.measdata[ii][pos])
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| 217 | && !isinf(_Parser.Data.measdata[ii][pos])) {
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| 218 | v = 1;
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| 219 | }
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[627] | 220 | }
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[1021] | 221 | if (!v) {
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| 222 | continue;
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[627] | 223 | }
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[1021] | 224 | else
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| 225 | {
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[1044] | 226 | int isat = (_Parser.Data.satellites[ii] < 120
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| 227 | ? _Parser.Data.satellites[ii]
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| 228 | : _Parser.Data.satellites[ii] - 80);
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| 229 |
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[1021] | 230 | // variables df and pos are used consequently. Perlt
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| 231 | if (df & GNSSDF_C1DATA) {
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| 232 | obs->_o.C1 = _Parser.Data.measdata[ii][pos];
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| 233 | }
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| 234 | else if (df & GNSSDF_C2DATA) {
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| 235 | obs->_o.C2 = _Parser.Data.measdata[ii][pos];
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| 236 | }
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| 237 | else if (df & GNSSDF_P1DATA) {
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| 238 | obs->_o.P1 = _Parser.Data.measdata[ii][pos];
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| 239 | }
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| 240 | else if (df & GNSSDF_P2DATA) {
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| 241 | obs->_o.P2 = _Parser.Data.measdata[ii][pos];
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| 242 | }
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| 243 | else if (df & (GNSSDF_L1CDATA|GNSSDF_L1PDATA)) {
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[1044] | 244 | obs->_o.L1 = _Parser.Data.measdata[ii][pos];
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| 245 | obs->_o.SNR1 = _Parser.Data.snrL1[ii];
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| 246 | obs->_o.lock_timei_L1 = _Parser.lastlockl1[isat];
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[1021] | 247 | }
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| 248 | else if (df & (GNSSDF_L2CDATA|GNSSDF_L2PDATA)) {
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[1044] | 249 | obs->_o.L2 = _Parser.Data.measdata[ii][pos];
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| 250 | obs->_o.SNR2 = _Parser.Data.snrL2[ii];
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| 251 | obs->_o.lock_timei_L2 = _Parser.lastlockl2[isat];
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[1021] | 252 | }
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| 253 | else if (df & (GNSSDF_S1CDATA|GNSSDF_S1PDATA)) {
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| 254 | obs->_o.S1 = _Parser.Data.measdata[ii][pos];
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| 255 | }
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| 256 | else if (df & (GNSSDF_S2CDATA|GNSSDF_S2PDATA)) {
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| 257 | obs->_o.S2 = _Parser.Data.measdata[ii][pos];
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| 258 | }
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[627] | 259 | }
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[511] | 260 | }
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[366] | 261 | }
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[296] | 262 | }
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[1021] | 263 |
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| 264 | // GPS Ephemeris
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| 265 | // -------------
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| 266 | else if (rr == 1019) {
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| 267 | decoded = true;
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| 268 | gpsephemeris* ep = new gpsephemeris(_Parser.ephemerisGPS);
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| 269 | emit newGPSEph(ep);
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| 270 | }
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| 271 |
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| 272 | // GLONASS Ephemeris
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| 273 | // -----------------
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| 274 | else if (rr == 1020) {
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| 275 | decoded = true;
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| 276 | glonassephemeris* ep = new glonassephemeris(_Parser.ephemerisGLONASS);
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| 277 | emit newGlonassEph(ep);
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| 278 | }
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[296] | 279 | }
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| 280 | }
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| 281 | }
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[1021] | 282 | if (_mode == unknown && decoded) {
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| 283 | _mode = observations;
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[1033] | 284 | // emit(newMessage( (_staID + " : mode set to observations").toAscii() ));
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[1021] | 285 | }
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[296] | 286 | }
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[1021] | 287 |
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| 288 | if (decoded) {
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| 289 | return success;
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[658] | 290 | }
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| 291 | else {
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[1021] | 292 | return failure;
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[658] | 293 | }
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[296] | 294 | }
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