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NUCp tracking and CPR position sanity checks.

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Track NUCp when we compute positions.

Do speed checks when we have an updated position with the same or worse NUCp
before accepting the new position. Don't do speed checks on new postions if
they improve NUCp - assume that the new position is better.

Include NUCp in aircraft.json

Gather stats on reasons for rejecting CPR data due to range/speed check failures.

Expire old positions if we have had no updates for 60 seconds.

Closes #16, closes #17.
This commit is contained in:
Oliver Jowett 2015-02-18 00:12:35 +00:00
parent 38845c2447
commit bfe2cb0336
6 changed files with 164 additions and 42 deletions
Download patch file Download diff file Expand all files Collapse all files

10
net_io.c
View file

@ -776,7 +776,7 @@ char *generateAircraftJson(const char *url_path, int *len) {
if (a->bFlags & MODES_ACFLAGS_CALLSIGN_VALID)
p += snprintf(p, end-p, ",\"flight\":\"%s\"", jsonEscapeString(a->flight));
if (a->bFlags & MODES_ACFLAGS_LATLON_VALID)
p += snprintf(p, end-p, ",\"lat\":%f,\"lon\":%f,\"seen_pos\":%.1f", a->lat, a->lon, (now - a->seenLatLon)/1000.0);
p += snprintf(p, end-p, ",\"lat\":%f,\"lon\":%f,\"nucp\":%u,\"seen_pos\":%.1f", a->lat, a->lon, a->pos_nuc, (now - a->seenLatLon)/1000.0);
if ((a->bFlags & MODES_ACFLAGS_AOG_VALID) && (a->bFlags & MODES_ACFLAGS_AOG))
p += snprintf(p, end-p, ",\"altitude\":\"ground\"");
else if (a->bFlags & MODES_ACFLAGS_ALTITUDE_VALID)
@ -882,9 +882,13 @@ static char * appendStatsJson(char *p,
p += snprintf(p, end-p,
",\"cpr\":{\"global_ok\":%u"
",\"global_bad\":%u"
",\"global_range\":%u"
",\"global_speed\":%u"
",\"global_skipped\":%u"
",\"local_ok\":%u"
",\"local_skipped\":%u"
",\"local_range\":%u"
",\"local_speed\":%u"
",\"filtered\":%u}"
",\"cpu\":{\"demod\":%llu,\"reader\":%llu,\"background\":%llu}"
",\"tracks\":{\"all\":%u"
@ -892,9 +896,13 @@ static char * appendStatsJson(char *p,
",\"messages\":%u}",
st->cpr_global_ok,
st->cpr_global_bad,
st->cpr_global_range_checks,
st->cpr_global_speed_checks,
st->cpr_global_skipped,
st->cpr_local_ok,
st->cpr_local_skipped,
st->cpr_local_range_checks,
st->cpr_local_speed_checks,
st->cpr_filtered,
(unsigned long long)demod_cpu_millis,
(unsigned long long)reader_cpu_millis,