Index: trunk/BNC/src/RTCM3/RTCM3coDecoder.h
===================================================================
--- trunk/BNC/src/RTCM3/RTCM3coDecoder.h	(revision 11057)
+++ trunk/BNC/src/RTCM3/RTCM3coDecoder.h	(revision 11058)
@@ -82,4 +82,10 @@
   void checkPrnRange(const t_prn& prn);
   QSet<QString>                         _prnOutOfRangeLogged;
+  // IGS-SSR: latest GPS/Galileo/QZSS/SBAS epoch (GPS seconds of week) of
+  // this stream, reference to detect GLONASS/BDS epochs in the outdated
+  // convention of old encoders (GLONASS: UTC seconds of day, BDS: BDT)
+  double                                _igsRefEpoSec = -1.0;
+  QMap<QChar, bncTime>                  _legacyEpochWarned; // warned at most once per hour
+  bool   igsLegacyEpoch(double value, double legacyRef, double period) const;