Changeset 11137 in ntrip for trunk/BNC/src/ephemeris.cpp

Timestamp:

Oct 28, 2026, 9:48:01 PM (19 hours ago)

Author:

stuerze

Message:

eph handling improved

File:

• trunk/BNC/src/ephemeris.cpp (modified) (1 diff)

trunk/BNC/src/ephemeris.cpp

@@ -26 +26 @@
   _clkCorr = 0;
 }
+
+// Is this data set newer than eph (the latest one received)?
+// Usually its TOC is later. An upload of a GPS or QZSS satellite within the
+// curve fit interval (cutover) gets a TOC slightly earlier than that of the
+// data set it replaces (e.g. 01:59:44 instead of 02:00:00, i.e. off the regular
+// grid), and a different IOD; the new upload is broadcast from then on and
+// the corrections of the ACs refer to it.
+////////////////////////////////////////////////////////////////////////////
+bool t_eph::isNewerThan(const t_eph* eph) const {
+  if (eph->_TOC < _TOC) {
+    return true;
+  }
+  const double MAX_CUTOVER_SHIFT = 600.0;  // observed: 16 s, 32 s
+  if ((system() == GPS || system() == QZSS) && system() == eph->system() &&
+      IOD() != eph->IOD() && eph->_TOC - _TOC <= MAX_CUTOVER_SHIFT) {
+    return true;
+  }
+  return false;
+}
+
 // Destructor
 ////////////////////////////////////////////////////////////////////////////