source: ntrip/trunk/BNC/src/PPP/pppClient.cpp@ 5877

Last change on this file since 5877 was 5877, checked in by mervart, 8 years ago
File size: 15.8 KB
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1
2// Part of BNC, a utility for retrieving decoding and
3// converting GNSS data streams from NTRIP broadcasters.
4//
5// Copyright (C) 2007
6// German Federal Agency for Cartography and Geodesy (BKG)
7// http://www.bkg.bund.de
8// Czech Technical University Prague, Department of Geodesy
9// http://www.fsv.cvut.cz
10//
11// Email: euref-ip@bkg.bund.de
12//
13// This program is free software; you can redistribute it and/or
14// modify it under the terms of the GNU General Public License
15// as published by the Free Software Foundation, version 2.
16//
17// This program is distributed in the hope that it will be useful,
18// but WITHOUT ANY WARRANTY; without even the implied warranty of
19// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20// GNU General Public License for more details.
21//
22// You should have received a copy of the GNU General Public License
23// along with this program; if not, write to the Free Software
24// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25
26/* -------------------------------------------------------------------------
27 * BKG NTRIP Client
28 * -------------------------------------------------------------------------
29 *
30 * Class: t_pppClient
31 *
32 * Purpose: PPP Client processing starts here
33 *
34 * Author: L. Mervart
35 *
36 * Created: 29-Jul-2014
37 *
38 * Changes:
39 *
40 * -----------------------------------------------------------------------*/
41
42#include <QThreadStorage>
43
44#include <iostream>
45#include <iomanip>
46#include <stdlib.h>
47#include <string.h>
48#include <stdexcept>
49
50#include "pppClient.h"
51#include "pppEphPool.h"
52#include "pppObsPool.h"
53#include "bncconst.h"
54#include "bncutils.h"
55#include "pppStation.h"
56#include "bncantex.h"
57#include "pppFilter.h"
58
59using namespace BNC_PPP;
60using namespace std;
61
62// Global variable holding thread-specific pointers
63//////////////////////////////////////////////////////////////////////////////
64QThreadStorage<t_pppClient*> CLIENTS;
65
66// Static function returning thread-specific pointer
67//////////////////////////////////////////////////////////////////////////////
68t_pppClient* t_pppClient::instance() {
69 return CLIENTS.localData();
70}
71
72// Constructor
73//////////////////////////////////////////////////////////////////////////////
74t_pppClient::t_pppClient(const t_pppOptions* opt) {
75 _output = 0;
76 _opt = new t_pppOptions(*opt);
77 _log = new ostringstream();
78 _ephPool = new t_pppEphPool();
79 _obsPool = new t_pppObsPool();
80 _staRover = new t_pppStation();
81 _filter = new t_pppFilter();
82 _tides = new t_tides();
83
84 if (!_opt->_antexFile.empty()) {
85 _antex = new bncAntex(_opt->_antexFile.c_str());
86 }
87 else {
88 _antex = 0;
89 }
90
91 CLIENTS.setLocalData(this); // CLIENTS takes ownership over "this"
92}
93
94// Destructor
95//////////////////////////////////////////////////////////////////////////////
96t_pppClient::~t_pppClient() {
97 delete _log;
98 delete _opt;
99 delete _ephPool;
100 delete _obsPool;
101 delete _staRover;
102 delete _antex;
103 delete _filter;
104 delete _tides;
105 clearObs();
106}
107
108//
109//////////////////////////////////////////////////////////////////////////////
110void t_pppClient::putEphemeris(const t_eph* eph) {
111 const t_ephGPS* ephGPS = dynamic_cast<const t_ephGPS*>(eph);
112 const t_ephGlo* ephGlo = dynamic_cast<const t_ephGlo*>(eph);
113 const t_ephGal* ephGal = dynamic_cast<const t_ephGal*>(eph);
114 if (ephGPS) {
115 _ephPool->putEphemeris(new t_ephGPS(*ephGPS));
116 }
117 else if (ephGlo) {
118 _ephPool->putEphemeris(new t_ephGlo(*ephGlo));
119 }
120 else if (ephGal) {
121 _ephPool->putEphemeris(new t_ephGal(*ephGal));
122 }
123}
124
125//
126//////////////////////////////////////////////////////////////////////////////
127void t_pppClient::putOrbCorrections(const vector<t_orbCorr*>& corr) {
128 for (unsigned ii = 0; ii < corr.size(); ii++) {
129 _ephPool->putOrbCorrection(new t_orbCorr(*corr[ii]));
130 }
131}
132
133//
134//////////////////////////////////////////////////////////////////////////////
135void t_pppClient::putClkCorrections(const vector<t_clkCorr*>& corr) {
136 for (unsigned ii = 0; ii < corr.size(); ii++) {
137 _ephPool->putClkCorrection(new t_clkCorr(*corr[ii]));
138 }
139}
140
141//
142//////////////////////////////////////////////////////////////////////////////
143void t_pppClient::putBiases(const vector<t_satBias*>& biases) {
144 for (unsigned ii = 0; ii < biases.size(); ii++) {
145 _obsPool->putBias(new t_satBias(*biases[ii]));
146 }
147}
148
149//
150//////////////////////////////////////////////////////////////////////////////
151t_irc t_pppClient::prepareObs(const vector<t_satObs*>& satObs,
152 vector<t_pppSatObs*>& obsVector, bncTime& epoTime) {
153 // Default
154 // -------
155 epoTime.reset();
156
157 // Create vector of valid observations
158 // -----------------------------------
159 int numValidGPS = 0;
160 for (unsigned ii = 0; ii < satObs.size(); ii++) {
161 char system = satObs[ii]->_prn.system();
162 if (system == 'G' || (system == 'R' && OPT->useGlonass())) {
163 t_pppSatObs* pppSatObs = new t_pppSatObs(*satObs[ii]);
164 if (pppSatObs->isValid()) {
165 obsVector.push_back(pppSatObs);
166 if (pppSatObs->prn().system() == 'G') {
167 ++numValidGPS;
168 }
169 }
170 else {
171 delete pppSatObs;
172 }
173 }
174 }
175
176 // Check whether data are synchronized, compute epoTime
177 // ----------------------------------------------------
178 const double MAXSYNC = 0.05; // synchronization limit
179 double meanDt = 0.0;
180 for (unsigned ii = 0; ii < obsVector.size(); ii++) {
181 const t_pppSatObs* satObs = obsVector.at(ii);
182 if (epoTime.undef()) {
183 epoTime = satObs->time();
184 }
185 else {
186 double dt = satObs->time() - epoTime;
187 if (fabs(dt) > MAXSYNC) {
188 LOG << "t_pppClient::prepareObs asynchronous observations" << endl;
189 return failure;
190 }
191 meanDt += dt;
192 }
193 }
194
195 if (obsVector.size() > 0) {
196 epoTime += meanDt / obsVector.size();
197 }
198
199 return success;
200}
201
202// Compute the Bancroft position, check for blunders
203//////////////////////////////////////////////////////////////////////////////
204t_irc t_pppClient::cmpBancroft(const bncTime& epoTime,
205 vector<t_pppSatObs*>& obsVector,
206 ColumnVector& xyzc, bool print) {
207
208 t_lc::type tLC = (OPT->dualFreqRequired() ? t_lc::cIF : t_lc::c1);
209
210 while (true) {
211 Matrix BB(obsVector.size(), 4);
212 int iObs = -1;
213 for (unsigned ii = 0; ii < obsVector.size(); ii++) {
214 const t_pppSatObs* satObs = obsVector.at(ii);
215 if ( satObs->isValid() && satObs->prn().system() == 'G' &&
216 (!satObs->modelSet() || satObs->eleSat() >= OPT->_minEle) ) {
217 ++iObs;
218 BB[iObs][0] = satObs->xc()[0];
219 BB[iObs][1] = satObs->xc()[1];
220 BB[iObs][2] = satObs->xc()[2];
221 BB[iObs][3] = satObs->obsValue(tLC) - satObs->cmpValueForBanc(tLC);
222 }
223 }
224 if (iObs + 1 < OPT->_minObs) {
225 LOG << "t_pppClient::cmpBancroft not enough observations" << endl;
226 return failure;
227 }
228 BB = BB.Rows(1,iObs+1);
229 bancroft(BB, xyzc);
230
231 xyzc[3] /= t_CST::c;
232
233 // Check Blunders
234 // --------------
235 const double BLUNDER = 100.0;
236 double maxRes = 0.0;
237 unsigned maxResIndex = 0;
238 for (unsigned ii = 0; ii < obsVector.size(); ii++) {
239 const t_pppSatObs* satObs = obsVector.at(ii);
240 if ( satObs->isValid() && satObs->prn().system() == 'G' &&
241 (!satObs->modelSet() || satObs->eleSat() >= OPT->_minEle) ) {
242 ColumnVector rr = satObs->xc().Rows(1,3) - xyzc.Rows(1,3);
243 double res = rr.norm_Frobenius() - satObs->obsValue(tLC)
244 - (satObs->xc()[3] - xyzc[3]) * t_CST::c;
245 if (fabs(res) > maxRes) {
246 maxRes = fabs(res);
247 maxResIndex = ii;
248 }
249 }
250 }
251 if (maxRes < BLUNDER) {
252 if (print) {
253 LOG.setf(ios::fixed);
254 LOG << string(epoTime) << " BANCROFT:" << ' '
255 << setw(14) << setprecision(3) << xyzc[0] << ' '
256 << setw(14) << setprecision(3) << xyzc[1] << ' '
257 << setw(14) << setprecision(3) << xyzc[2] << ' '
258 << setw(14) << setprecision(3) << xyzc[3] * t_CST::c << endl << endl;
259 }
260 break;
261 }
262 else {
263 t_pppSatObs* satObs = obsVector.at(maxResIndex);
264 LOG << "t_pppClient::cmpBancroft outlier " << satObs->prn().toString()
265 << " " << maxRes << endl;
266 delete satObs;
267 obsVector.erase(obsVector.begin() + maxResIndex);
268 }
269 }
270
271 return success;
272}
273
274// Compute A Priori GPS-Glonass Offset
275//////////////////////////////////////////////////////////////////////////////
276double t_pppClient::cmpOffGG(vector<t_pppSatObs*>& obsVector) {
277
278 t_lc::type tLC = (OPT->dualFreqRequired() ? t_lc::cIF : t_lc::c1);
279 double offGG = 0.0;
280
281 if (OPT->useGlonass()) {
282
283 while (obsVector.size() > 0) {
284 offGG = 0.0;
285 double maxRes = 0.0;
286 int maxResIndex = -1;
287 t_prn maxResPrn;
288 unsigned nObs = 0;
289 for (unsigned ii = 0; ii < obsVector.size(); ii++) {
290 t_pppSatObs* satObs = obsVector.at(ii);
291 if ( satObs->isValid() && satObs->prn().system() == 'R' &&
292 (!satObs->modelSet() || satObs->eleSat() >= OPT->_minEle) ) {
293 double ll = satObs->obsValue(tLC) - satObs->cmpValue(tLC);
294 ++nObs;
295 offGG += ll;
296 if (fabs(ll) > fabs(maxRes)) {
297 maxRes = ll;
298 maxResIndex = ii;
299 maxResPrn = satObs->prn();
300 }
301 }
302 }
303
304 if (nObs > 0) {
305 offGG = offGG / nObs;
306 }
307 else {
308 offGG = 0.0;
309 }
310
311 if (fabs(maxRes) > 1000.0) {
312 LOG << "t_pppClient::cmpOffGG outlier " << maxResPrn.toString() << " " << maxRes << endl;
313 obsVector.erase(obsVector.begin() + maxResIndex);
314 }
315 else {
316 break;
317 }
318 }
319 }
320
321 return offGG;
322}
323
324//
325//////////////////////////////////////////////////////////////////////////////
326void t_pppClient::initOutput(t_output* output) {
327 _output = output;
328 _output->_numSat = 0;
329 _output->_pDop = 0.0;
330 _output->_error = false;
331}
332
333//
334//////////////////////////////////////////////////////////////////////////////
335void t_pppClient::clearObs() {
336 for (unsigned ii = 0; ii < _obsRover.size(); ii++) {
337 delete _obsRover.at(ii);
338 }
339 _obsRover.clear();
340}
341
342//
343//////////////////////////////////////////////////////////////////////////////
344void t_pppClient::finish(t_irc irc) {
345
346 clearObs();
347
348 _output->_epoTime = _epoTimeRover;
349
350 if (irc == success) {
351 _output->_xyzRover[0] = _staRover->xyzApr()[0] + _filter->x()[0];
352 _output->_xyzRover[1] = _staRover->xyzApr()[1] + _filter->x()[1];
353 _output->_xyzRover[2] = _staRover->xyzApr()[2] + _filter->x()[2];
354
355 xyz2neu(_staRover->ellApr().data(), _filter->x().data(), _output->_neu);
356
357 copy(&_filter->Q().data()[0], &_filter->Q().data()[6], _output->_covMatrix);
358
359 _output->_numSat = _filter->numSat();
360 _output->_pDop = _filter->PDOP();
361 _output->_error = false;
362 }
363 else {
364 _output->_error = true;
365 }
366 _output->_log = _log->str();
367 delete _log; _log = new ostringstream();
368}
369
370//
371//////////////////////////////////////////////////////////////////////////////
372t_irc t_pppClient::cmpModel(t_pppStation* station, const ColumnVector& xyzc,
373 vector<t_pppSatObs*>& obsVector) {
374
375 bncTime time;
376 time = _epoTimeRover;
377 station->setName(OPT->_roverName);
378 station->setAntName(OPT->_antNameRover);
379 if (OPT->xyzAprRoverSet()) {
380 station->setXyzApr(OPT->_xyzAprRover);
381 }
382 else {
383 station->setXyzApr(xyzc.Rows(1,3));
384 }
385 station->setNeuEcc(OPT->_neuEccRover);
386
387 // Receiver Clock
388 // --------------
389 station->setDClk(xyzc[3]);
390
391 // Tides
392 // -----
393 station->setTideDspl( _tides->displacement(time, station->xyzApr()) );
394
395 // Observation model
396 // -----------------
397 vector<t_pppSatObs*>::iterator it = obsVector.begin();
398 while (it != obsVector.end()) {
399 t_pppSatObs* satObs = *it;
400 if (satObs->isValid()) {
401 satObs->cmpModel(station);
402 }
403 if (satObs->isValid() && satObs->eleSat() >= OPT->_minEle) {
404 ++it;
405 }
406 else {
407 delete satObs;
408 it = obsVector.erase(it);
409 }
410 }
411
412 return success;
413}
414
415//
416//////////////////////////////////////////////////////////////////////////////
417void t_pppClient::processEpoch(const vector<t_satObs*>& satObs, t_output* output) {
418
419 try {
420 initOutput(output);
421
422 // Prepare Observations of the Rover
423 // ---------------------------------
424 if (prepareObs(satObs, _obsRover, _epoTimeRover) != success) {
425 return finish(failure);
426 }
427
428 LOG << "\nResults of Epoch ";
429 if (!_epoTimeRover.undef()) LOG << string(_epoTimeRover);
430 LOG << "\n--------------------------------------\n";
431
432 for (int iter = 1; iter <= 2; iter++) {
433 ColumnVector xyzc(4); xyzc = 0.0;
434 bool print = (iter == 2);
435 if (cmpBancroft(_epoTimeRover, _obsRover, xyzc, print) != success) {
436 return finish(failure);
437 }
438 if (cmpModel(_staRover, xyzc, _obsRover) != success) {
439 return finish(failure);
440 }
441 }
442
443 _offGG = cmpOffGG(_obsRover);
444
445 // Store last epoch of data
446 // ------------------------
447 _obsPool->putEpoch(_epoTimeRover, _obsRover);
448
449 // Process Epoch in Filter
450 // -----------------------
451 if (_filter->processEpoch(_obsPool) != success) {
452 return finish(failure);
453 }
454 }
455 catch (Exception& exc) {
456 LOG << exc.what() << endl;
457 return finish(failure);
458 }
459 catch (t_except msg) {
460 LOG << msg.what() << endl;
461 return finish(failure);
462 }
463 catch (const char* msg) {
464 LOG << msg << endl;
465 return finish(failure);
466 }
467 catch (...) {
468 LOG << "unknown exception" << endl;
469 return finish(failure);
470 }
471
472 return finish(success);
473}
474
475//
476////////////////////////////////////////////////////////////////////////////
477double lorentz(const ColumnVector& aa, const ColumnVector& bb) {
478 return aa[0]*bb[0] + aa[1]*bb[1] + aa[2]*bb[2] - aa[3]*bb[3];
479}
480
481//
482////////////////////////////////////////////////////////////////////////////
483void t_pppClient::bancroft(const Matrix& BBpass, ColumnVector& pos) {
484
485 if (pos.Nrows() != 4) {
486 pos.ReSize(4);
487 }
488 pos = 0.0;
489
490 for (int iter = 1; iter <= 2; iter++) {
491 Matrix BB = BBpass;
492 int mm = BB.Nrows();
493 for (int ii = 1; ii <= mm; ii++) {
494 double xx = BB(ii,1);
495 double yy = BB(ii,2);
496 double traveltime = 0.072;
497 if (iter > 1) {
498 double zz = BB(ii,3);
499 double rho = sqrt( (xx-pos(1)) * (xx-pos(1)) +
500 (yy-pos(2)) * (yy-pos(2)) +
501 (zz-pos(3)) * (zz-pos(3)) );
502 traveltime = rho / t_CST::c;
503 }
504 double angle = traveltime * t_CST::omega;
505 double cosa = cos(angle);
506 double sina = sin(angle);
507 BB(ii,1) = cosa * xx + sina * yy;
508 BB(ii,2) = -sina * xx + cosa * yy;
509 }
510
511 Matrix BBB;
512 if (mm > 4) {
513 SymmetricMatrix hlp; hlp << BB.t() * BB;
514 BBB = hlp.i() * BB.t();
515 }
516 else {
517 BBB = BB.i();
518 }
519 ColumnVector ee(mm); ee = 1.0;
520 ColumnVector alpha(mm); alpha = 0.0;
521 for (int ii = 1; ii <= mm; ii++) {
522 alpha(ii) = lorentz(BB.Row(ii).t(),BB.Row(ii).t())/2.0;
523 }
524 ColumnVector BBBe = BBB * ee;
525 ColumnVector BBBalpha = BBB * alpha;
526 double aa = lorentz(BBBe, BBBe);
527 double bb = lorentz(BBBe, BBBalpha)-1;
528 double cc = lorentz(BBBalpha, BBBalpha);
529 double root = sqrt(bb*bb-aa*cc);
530
531 Matrix hlpPos(4,2);
532 hlpPos.Column(1) = (-bb-root)/aa * BBBe + BBBalpha;
533 hlpPos.Column(2) = (-bb+root)/aa * BBBe + BBBalpha;
534
535 ColumnVector omc(2);
536 for (int pp = 1; pp <= 2; pp++) {
537 hlpPos(4,pp) = -hlpPos(4,pp);
538 omc(pp) = BB(1,4) -
539 sqrt( (BB(1,1)-hlpPos(1,pp)) * (BB(1,1)-hlpPos(1,pp)) +
540 (BB(1,2)-hlpPos(2,pp)) * (BB(1,2)-hlpPos(2,pp)) +
541 (BB(1,3)-hlpPos(3,pp)) * (BB(1,3)-hlpPos(3,pp)) ) -
542 hlpPos(4,pp);
543 }
544 if ( fabs(omc(1)) > fabs(omc(2)) ) {
545 pos = hlpPos.Column(2);
546 }
547 else {
548 pos = hlpPos.Column(1);
549 }
550 }
551}
552
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