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When considering whether to suppress altitude messages, ignore mlat DF17s.

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This commit is contained in:
Oliver Jowett 2015-06-29 12:45:50 +01:00
parent f1f76cb8e3
commit de4e233969
1 changed files with 3 additions and 3 deletions
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6
track.c
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@ -508,12 +508,12 @@ struct aircraft *trackUpdateFromMessage(struct modesMessage *mm)
a->modeACflags &= ~MODEAC_MSG_MODEC_HIT;
}
// If we received an altitude in a DF17/18 squitter recently, ignore
// If we received an altitude in a (non-mlat) DF17/18 squitter recently, ignore
// DF0/4/16/20 altitudes as single-bit errors can attribute them to the wrong
// aircraft
if ((a->bFlags & MODES_ACFLAGS_ALTITUDE_VALID) &&
if ((a->bFlags & ~a->mlatFlags & MODES_ACFLAGS_ALTITUDE_VALID) &&
(now - a->seenAltitude) < 15000 &&
(a->bFlags & MODES_ACFLAGS_LATLON_VALID) &&
(a->bFlags & ~a->mlatFlags & MODES_ACFLAGS_LATLON_VALID) &&
(now - a->seenLatLon) < 15000 &&
mm->msgtype != 17 &&
mm->msgtype != 18) {