4ecd6958a1
This is possible now that the SBS output doesn't rely on the global block timestamp; the output will look like this: MSG,8,111,11111,4AC954,111111,2015/02/08,17:57:53.917,2015/02/08,17:57:53.936,,,,,,,,,,,,0 MSG,7,111,11111,392AEB,111111,2015/02/08,17:57:53.744,2015/02/08,17:57:53.936,,15375,,,,,,,,,,0 MSG,8,111,11111,392AEB,111111,2015/02/08,17:57:53.917,2015/02/08,17:57:53.936,,,,,,,,,,,,0 MSG,6,111,11111,800387,111111,2015/02/08,17:57:53.919,2015/02/08,17:57:53.936,,,,,,,,4745,0,0,0,0 where the "receive timestamp" (first time column) goes backwards to reflect the original reception time of the delayed message, but the "forwarded timestamp" (second time column) reflects the actual forwarding time.
109 lines
4.8 KiB
C
109 lines
4.8 KiB
C
// Part of dump1090, a Mode S message decoder for RTLSDR devices.
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//
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// track.h: aircraft state tracking prototypes
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//
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// Copyright (c) 2014,2015 Oliver Jowett <oliver@mutability.co.uk>
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//
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// This file is free software: you may copy, redistribute and/or modify it
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// under the terms of the GNU General Public License as published by the
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// This file incorporates work covered by the following copyright and
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// permission notice:
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//
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// Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef DUMP1090_TRACK_H
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#define DUMP1090_TRACK_H
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/* Maximum age of tracked aircraft in seconds */
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#define TRACK_AIRCRAFT_TTL 300
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/* Maximum age of a tracked aircraft with only 1 message received, in seconds */
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#define TRACK_AIRCRAFT_ONEHIT_TTL 30
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/* Structure used to describe the state of one tracked aircraft */
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struct aircraft {
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uint32_t addr; // ICAO address
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char flight[16]; // Flight number
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double signalLevel[8]; // Last 8 Signal Amplitudes
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int altitude; // Altitude
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int speed; // Velocity
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int track; // Angle of flight
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int vert_rate; // Vertical rate.
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time_t seen; // Time at which the last packet was received
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time_t seenLatLon; // Time at which the last lat long was calculated
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uint64_t timestamp; // Timestamp at which the last packet was received
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uint64_t timestampLatLon;// Timestamp at which the last lat long was calculated
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long messages; // Number of Mode S messages received
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int modeA; // Squawk
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int modeC; // Altitude
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long modeAcount; // Mode A Squawk hit Count
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long modeCcount; // Mode C Altitude hit Count
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int modeACflags; // Flags for mode A/C recognition
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int fatsv_emitted_altitude; // last FA emitted altitude
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int fatsv_emitted_track; // last FA emitted angle of flight
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time_t fatsv_last_emitted; // time aircraft was last FA emitted
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// Encoded latitude and longitude as extracted by odd and even CPR encoded messages
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int odd_cprlat;
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int odd_cprlon;
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int even_cprlat;
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int even_cprlon;
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uint64_t odd_cprtime;
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uint64_t even_cprtime;
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double lat, lon; // Coordinated obtained from CPR encoded data
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int bFlags; // Flags related to valid fields in this structure
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struct aircraft *next; // Next aircraft in our linked list
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struct modesMessage first_message; // A copy of the first message we received for this aircraft.
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};
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/* Update aircraft state from data in the provided mesage.
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* Return the tracked aircraft.
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*/
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struct modesMessage;
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struct aircraft *trackUpdateFromMessage(struct modesMessage *mm);
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/* Call periodically */
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void trackPeriodicUpdate();
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#endif
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