source: ntrip/trunk/BNC/src/latencychecker.cpp@ 6768

Last change on this file since 6768 was 6768, checked in by weber, 9 years ago

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1// Part of BNC, a utility for retrieving decoding and
2// converting GNSS data streams from NTRIP broadcasters.
3//
4// Copyright (C) 2007
5// German Federal Agency for Cartography and Geodesy (BKG)
6// http://www.bkg.bund.de
7// Czech Technical University Prague, Department of Geodesy
8// http://www.fsv.cvut.cz
9//
10// Email: euref-ip@bkg.bund.de
11//
12// This program is free software; you can redistribute it and/or
13// modify it under the terms of the GNU General Public License
14// as published by the Free Software Foundation, version 2.
15//
16// This program is distributed in the hope that it will be useful,
17// but WITHOUT ANY WARRANTY; without even the implied warranty of
18// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19// GNU General Public License for more details.
20//
21// You should have received a copy of the GNU General Public License
22// along with this program; if not, write to the Free Software
23// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24
25/* -------------------------------------------------------------------------
26 * BKG NTRIP Client
27 * -------------------------------------------------------------------------
28 *
29 * Class: latencyChecker
30 *
31 * Purpose: Check incoming GNSS data for latencies, gaps etc.
32 *
33 * Author: G. Weber
34 *
35 * Created: 02-Feb-2009
36 *
37 * Changes:
38 *
39 * -----------------------------------------------------------------------*/
40
41#include <iostream>
42
43#ifdef WIN32
44#include <windows.h>
45#else
46#include <unistd.h>
47#endif
48
49#include "latencychecker.h"
50#include "bnccore.h"
51#include "bncutils.h"
52#include "bncsettings.h"
53
54using namespace std;
55
56// Constructor
57//////////////////////////////////////////////////////////////////////////////
58latencyChecker::latencyChecker(QByteArray staID) {
59
60 _staID = staID;
61
62 connect(this, SIGNAL(newMessage(QByteArray,bool)),
63 BNC_CORE, SLOT(slotMessage(const QByteArray,bool)));
64
65 bncSettings settings;
66
67 // Notice threshold
68 // ----------------
69 QString obsRate = settings.value("obsRate").toString();
70 _inspSegm = 0;
71 if ( obsRate.isEmpty() ) {
72 _inspSegm = 0;
73 }
74 else if ( obsRate.indexOf("5 Hz") != -1 ) {
75 _inspSegm = 20;
76 }
77 else if ( obsRate.indexOf("1 Hz") != -1 ) {
78 _inspSegm = 10;
79 }
80 else if ( obsRate.indexOf("0.5 Hz") != -1 ) {
81 _inspSegm = 20;
82 }
83 else if ( obsRate.indexOf("0.2 Hz") != -1 ) {
84 _inspSegm = 40;
85 }
86 else if ( obsRate.indexOf("0.1 Hz") != -1 ) {
87 _inspSegm = 50;
88 }
89 _adviseFail = settings.value("adviseFail").toInt();
90 _adviseReco = settings.value("adviseReco").toInt();
91 _adviseScript = settings.value("adviseScript").toString();
92 expandEnvVar(_adviseScript);
93
94 // Latency interval/average
95 // ------------------------
96 _perfIntr = 1;
97 QString perfIntr = settings.value("perfIntr").toString();
98 if ( perfIntr.isEmpty() ) {
99 _perfIntr = 1;
100 }
101 else if ( perfIntr.indexOf("2 sec") != -1 ) {
102 _perfIntr = 2;
103 }
104 else if ( perfIntr.indexOf("10 sec") != -1 ) {
105 _perfIntr = 10;
106 }
107 else if ( perfIntr.indexOf("1 min") != -1 ) {
108 _perfIntr = 60;
109 }
110 else if ( perfIntr.left(5).indexOf("5 min") != -1 ) {
111 _perfIntr = 300;
112 }
113 else if ( perfIntr.indexOf("15 min") != -1 ) {
114 _perfIntr = 900;
115 }
116 else if ( perfIntr.indexOf("1 hour") != -1 ) {
117 _perfIntr = 3600;
118 }
119 else if ( perfIntr.indexOf("6 hours") != -1 ) {
120 _perfIntr = 21600;
121 }
122 else if ( perfIntr.indexOf("1 day") != -1 ) {
123 _perfIntr = 86400;
124 }
125
126 // RTCM message types
127 // ------------------
128 _checkMountPoint = settings.value("miscMount").toString();
129
130 // Initialize private members
131 // --------------------------
132 _maxDt = 1000.0;
133 _wrongEpoch = false;
134 _checkSeg = false;
135 _numSucc = 0;
136 _secSucc = 0;
137 _secFail = 0;
138 _initPause = 0;
139 _currPause = 0;
140 _begCorrupt = false;
141 _endCorrupt = false;
142 _followSec = false;
143 _oldSecGPS = 0;
144 _newSecGPS = 0;
145 _numGaps = 0;
146 _diffSecGPS = 0;
147 _numLat = 0;
148 _sumLat = 0.0;
149 _sumLatQ = 0.0;
150 _meanDiff = 0.0;
151 _minLat = _maxDt;
152 _maxLat = -_maxDt;
153 _curLat = 0.0;
154
155 _checkTime = QDateTime::currentDateTime();
156 _decodeSucc = QDateTime::currentDateTime();
157
158 _decodeStart = QDateTime::currentDateTime();
159 _decodeStop = QDateTime::currentDateTime();
160
161}
162
163// Destructor
164//////////////////////////////////////////////////////////////////////////////
165latencyChecker::~latencyChecker() {
166}
167
168// Perform 'Begin outage' check
169//////////////////////////////////////////////////////////////////////////////
170void latencyChecker::checkReconnect() {
171
172 if (_inspSegm == 0) { return;}
173
174 // Begin outage threshold
175 // ----------------------
176 if ( _decodeStop.isValid() ) {
177 if ( _decodeStop.secsTo(QDateTime::currentDateTime()) > _adviseFail * 60 ) {
178 _decodeStop.setDate(QDate());
179 _decodeStop.setTime(QTime());
180 _begDateOut = _checkTime.toUTC().date().toString("yy-MM-dd");
181 _begTimeOut = _checkTime.toUTC().time().toString("hh:mm:ss");
182 emit(newMessage((_staID
183 + ": Failure threshold exceeded, outage since "
184 + _begDateOut + " " + _begTimeOut).toAscii(), true));
185 callScript(("Begin_Outage "
186 + _begDateOut + " " + _begTimeOut).toAscii());
187 }
188 }
189 _fromReconnect = true;
190 _decodeStart = QDateTime::currentDateTime();
191}
192
193// Perform Corrupt and 'End outage' check
194//////////////////////////////////////////////////////////////////////////////
195void latencyChecker::checkOutage(bool decoded) {
196
197 if (_inspSegm == 0) { return;}
198
199 if (decoded) { _numSucc += 1; }
200
201 if (!_checkPause.isValid() || _checkPause.secsTo(QDateTime::currentDateTime()) >= _currPause ) {
202 if (!_checkSeg) {
203 if ( _checkTime.secsTo(QDateTime::currentDateTime()) > _inspSegm ) {
204 _checkSeg = true;
205 }
206 }
207
208 // Check - once per inspect segment
209 // --------------------------------
210 if (_checkSeg) {
211
212 _checkTime = QDateTime::currentDateTime();
213
214 if (_numSucc > 0) {
215 _secSucc += _inspSegm;
216 _decodeSucc = QDateTime::currentDateTime();
217 if (_secSucc > _adviseReco * 60) {
218 _secSucc = _adviseReco * 60 + 1;
219 }
220 _numSucc = 0;
221 _currPause = _initPause;
222 _checkPause.setDate(QDate());
223 _checkPause.setTime(QTime());
224 }
225 else {
226 _secFail += _inspSegm;
227 _secSucc = 0;
228 if (_secFail > _adviseFail * 60) {
229 _secFail = _adviseFail * 60 + 1;
230 }
231 if (!_checkPause.isValid()) {
232 _checkPause = QDateTime::currentDateTime();
233 }
234 else {
235 _checkPause.setDate(QDate());
236 _checkPause.setTime(QTime());
237 _secFail = _secFail + _currPause - _inspSegm;
238 _currPause = _currPause * 2;
239 if (_currPause > 960) {
240 _currPause = 960;
241 }
242 }
243 }
244
245 // End corrupt threshold
246 // ---------------------
247 if ( _begCorrupt && !_endCorrupt && _secSucc > _adviseReco * 60 ) {
248 _endDateCor = QDateTime::currentDateTime()
249 .addSecs(- _adviseReco * 60)
250 .toUTC().date().toString("yy-MM-dd");
251 _endTimeCor = QDateTime::currentDateTime()
252 .addSecs(- _adviseReco * 60)
253 .toUTC().time().toString("hh:mm:ss");
254 emit(newMessage((_staID
255 + ": Recovery threshold exceeded, corruption ended "
256 + _endDateCor + " " + _endTimeCor).toAscii(), true));
257 callScript(("End_Corrupted "
258 + _endDateCor + " " + _endTimeCor + " Begin was "
259 + _begDateCor + " " + _begTimeCor).toAscii());
260 _endCorrupt = true;
261 _begCorrupt = false;
262 _secFail = 0;
263 }
264 else {
265
266 // Begin corrupt threshold
267 // -----------------------
268 if ( !_begCorrupt && _secFail > _adviseFail * 60 ) {
269 _begDateCor = _decodeSucc.toUTC().date().toString("yy-MM-dd");
270 _begTimeCor = _decodeSucc.toUTC().time().toString("hh:mm:ss");
271 emit(newMessage((_staID
272 + ": Failure threshold exceeded, corrupted since "
273 + _begDateCor + " " + _begTimeCor).toAscii(), true));
274 callScript(("Begin_Corrupted "
275 + _begDateCor + " " + _begTimeCor).toAscii());
276 _begCorrupt = true;
277 _endCorrupt = false;
278 _secSucc = 0;
279 _numSucc = 0;
280 }
281 }
282 _checkSeg = false;
283 }
284 }
285
286 if (_fromReconnect) {
287 _decodeStart = QDateTime::currentDateTime();
288 }
289
290 // End outage threshold
291 // --------------------
292 if ( _decodeStart.isValid() ) {
293 if ( _decodeStart.secsTo(QDateTime::currentDateTime()) > _adviseReco * 60 ) {
294 _decodeStart.setDate(QDate());
295 _decodeStart.setTime(QTime());
296 _endDateOut = QDateTime::currentDateTime()
297 .addSecs(- _adviseReco * 60)
298 .toUTC().date().toString("yy-MM-dd");
299 _endTimeOut = QDateTime::currentDateTime()
300 .addSecs(- _adviseReco * 60)
301 .toUTC().time().toString("hh:mm:ss");
302 emit(newMessage((_staID
303 + ": Recovery threshold exceeded, outage ended "
304 + _endDateOut + " " + _endTimeOut).toAscii(), true));
305 if ( _begDateOut != "" && _begTimeOut != "" ) {
306 callScript(("End_Outage "
307 + _endDateOut + " " + _endTimeOut + " Begin was "
308 + _begDateOut + " " + _begTimeOut).toAscii());
309 }
310 else {
311 callScript(("End_Outage "
312 + _endDateOut + " " + _endTimeOut).toAscii());
313 }
314 }
315 }
316 _fromReconnect = false;
317 _decodeStop = QDateTime::currentDateTime();
318}
319
320// Perform latency checks (observations)
321//////////////////////////////////////////////////////////////////////////////
322void latencyChecker::checkObsLatency(const QList<t_satObs>& obsList) {
323
324 if (_perfIntr > 0 ) {
325
326 QListIterator<t_satObs> it(obsList);
327 while (it.hasNext()) {
328 const t_satObs& obs = it.next();
329
330 _newSecGPS = static_cast<int>(obs._time.gpssec());
331 if (_newSecGPS != _oldSecGPS) {
332 if (_newSecGPS % _perfIntr < _oldSecGPS % _perfIntr) {
333 if (_numLat > 0) {
334 if (_meanDiff > 0.0) {
335 if ( _checkMountPoint == _staID || _checkMountPoint == "ALL" ) {
336 emit( newMessage(QString("%1: Mean latency %2 sec, min %3, max %4, rms %5, %6 epochs, %7 gaps")
337 .arg(_staID.data())
338 .arg(int(_sumLat/_numLat*100)/100.)
339 .arg(int(_minLat*100)/100.)
340 .arg(int(_maxLat*100)/100.)
341 .arg(int((sqrt((_sumLatQ - _sumLat * _sumLat / _numLat)/_numLat))*100)/100.)
342 .arg(_numLat)
343 .arg(_numGaps)
344 .toAscii(), true) );
345 }
346 } else {
347 if ( _checkMountPoint == _staID || _checkMountPoint == "ALL" ) {
348 emit( newMessage(QString("%1: Mean latency %2 sec, min %3, max %4, rms %5, %6 epochs")
349 .arg(_staID.data())
350 .arg(int(_sumLat/_numLat*100)/100.)
351 .arg(int(_minLat*100)/100.)
352 .arg(int(_maxLat*100)/100.)
353 .arg(int((sqrt((_sumLatQ - _sumLat * _sumLat / _numLat)/_numLat))*100)/100.)
354 .arg(_numLat)
355 .toAscii(), true) );
356 }
357 }
358 }
359 _meanDiff = _diffSecGPS / _numLat;
360 _diffSecGPS = 0;
361 _numGaps = 0;
362 _sumLat = 0.0;
363 _sumLatQ = 0.0;
364 _numLat = 0;
365 _minLat = _maxDt;
366 _maxLat = -_maxDt;
367 }
368 if (_followSec) {
369 _diffSecGPS += _newSecGPS - _oldSecGPS;
370 if (_meanDiff>0.) {
371 if (_newSecGPS - _oldSecGPS > 1.5 * _meanDiff) {
372 _numGaps += 1;
373 }
374 }
375 }
376
377 // Compute the observations latency
378 // --------------------------------
379 int week;
380 double sec;
381 currentGPSWeeks(week, sec);
382 const double secPerWeek = 7.0 * 24.0 * 3600.0;
383 if (week < int(obs._time.gpsw())) {
384 week += 1;
385 sec -= secPerWeek;
386 }
387 if (week > int(obs._time.gpsw())) {
388 week -= 1;
389 sec += secPerWeek;
390 }
391 _curLat = sec - obs._time.gpssec();
392 _sumLat += _curLat;
393 _sumLatQ += _curLat * _curLat;
394 if (_curLat < _minLat) {
395 _minLat = _curLat;
396 }
397 if (_curLat >= _maxLat) {
398 _maxLat = _curLat;
399 }
400 _numLat += 1;
401 _oldSecGPS = _newSecGPS;
402 _followSec = true;
403 }
404 }
405 }
406}
407
408// Perform latency checks (corrections)
409//////////////////////////////////////////////////////////////////////////////
410void latencyChecker::checkCorrLatency(int corrGPSEpochTime) {
411
412 if (corrGPSEpochTime < 0) {
413 return;
414 }
415
416 if (_perfIntr > 0) {
417
418 _newSecGPS = corrGPSEpochTime;
419
420 int week;
421 double sec;
422 currentGPSWeeks(week, sec);
423 double dt = fabs(sec - _newSecGPS);
424 const double secPerWeek = 7.0 * 24.0 * 3600.0;
425 if (dt > 0.5 * secPerWeek) {
426 if (sec > _newSecGPS) {
427 sec -= secPerWeek;
428 } else {
429 sec += secPerWeek;
430 }
431 }
432 if (_newSecGPS != _oldSecGPS) {
433 if (int(_newSecGPS) % _perfIntr < int(_oldSecGPS) % _perfIntr) {
434 if (_numLat>0) {
435 QString late;
436 if (_meanDiff>0.) {
437 late = QString(": Mean latency %1 sec, min %2, max %3, rms %4, %5 epochs, %6 gaps")
438 .arg(int(_sumLat/_numLat*100)/100.)
439 .arg(int(_minLat*100)/100.)
440 .arg(int(_maxLat*100)/100.)
441 .arg(int((sqrt((_sumLatQ - _sumLat * _sumLat / _numLat)/_numLat))*100)/100.)
442 .arg(_numLat)
443 .arg(_numGaps);
444 if ( _checkMountPoint == _staID || _checkMountPoint == "ALL" ) {
445 emit(newMessage(QString(_staID + late ).toAscii(), true) );
446 }
447 }
448 else {
449 late = QString(": Mean latency %1 sec, min %2, max %3, rms %4, %5 epochs")
450 .arg(int(_sumLat/_numLat*100)/100.)
451 .arg(int(_minLat*100)/100.)
452 .arg(int(_maxLat*100)/100.)
453 .arg(int((sqrt((_sumLatQ - _sumLat * _sumLat / _numLat)/_numLat))*100)/100.)
454 .arg(_numLat);
455 if ( _checkMountPoint == _staID || _checkMountPoint == "ALL" ) {
456 emit(newMessage(QString(_staID + late ).toAscii(), true) );
457 }
458 }
459 }
460 _meanDiff = int(_diffSecGPS)/_numLat;
461 _diffSecGPS = 0;
462 _numGaps = 0;
463 _sumLat = 0.0;
464 _sumLatQ = 0.0;
465 _numLat = 0;
466 _minLat = 1000.;
467 _maxLat = -1000.;
468 }
469 if (_followSec) {
470 _diffSecGPS += _newSecGPS - _oldSecGPS;
471 if (_meanDiff>0.) {
472 if (_newSecGPS - _oldSecGPS > 1.5 * _meanDiff) {
473 _numGaps += 1;
474 }
475 }
476 }
477 _curLat = sec - _newSecGPS;
478 _sumLat += _curLat;
479 _sumLatQ += _curLat * _curLat;
480 if (_curLat < _minLat) {
481 _minLat = _curLat;
482 }
483 if (_curLat >= _maxLat) {
484 _maxLat = _curLat;
485 }
486 _numLat += 1;
487 _oldSecGPS = _newSecGPS;
488 _followSec = true;
489 }
490 }
491}
492
493// Call advisory notice script
494////////////////////////////////////////////////////////////////////////////
495void latencyChecker::callScript(const char* comment) {
496 if (!_adviseScript.isEmpty()) {
497#ifdef WIN32
498 Sleep(1);
499 QProcess::startDetached(_adviseScript, QStringList() << _staID << comment) ;
500#else
501 sleep(1);
502 QProcess::startDetached("nohup", QStringList() << _adviseScript << _staID << comment) ;
503#endif
504 }
505}
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