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Update README-json.md

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henry1952 2019-04-13 09:41:21 +02:00 committed by GitHub
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@ -37,9 +37,10 @@ This file contains dump1090's list of recently seen aircraft. The keys are:
* now: the time this file was generated, in seconds since Jan 1 1970 00:00:00 GMT (the Unix epoch).
* messages: the total number of Mode S messages processed since dump1090 started.
* aircraft: an array of JSON objects, one per known aircraft. Each aircraft has the following keys. Keys will be omitted if data is not available.
* hex: the 24-bit ICAO identifier of the aircraft, as 6 hex digits. The identifier may start with '~', this means that the address is a non-ICAO address (e.g. from TIS-B).
* type:
* flight: the flight name / callsign
* hex: the 24-bit ICAO identifier of the aircraft, as 6 hex digits.
The identifier may start with '~', this means that the address is a non-ICAO address (e.g. from TIS-B).
* type: type of the modeS address e.g. ADS-B, ADR-R, TIS-B
* flight: callsign, the flight name or aircraft registration as 8 chars (2.2.8.2.6)
* alt_baro: the aircraft barometric altitude in either feet or meters
* alt_geom: geometric (GNSS / INS) altitude in either feet or meters
* gs: ground speed in knots
@ -53,30 +54,36 @@ This file contains dump1090's list of recently seen aircraft. The keys are:
* true_heading: Heading, degrees clockwise from true north
* baro_rate: Rate of change of barometric altitude, feet/minute
* geom_rate: Rate of change of geometric (GNSS / INS) altitude, feet/minute
* squawk: identity (Squawk), encoded as 4 hex digits
* squawk: Mode A code (Squawk), encoded as 4 octal digits, useful for ADS-B report correlation with SSR data
* emergency: provide asdditional information regarding aircraft status (2.2.3.2.7.8.1.1)
* category: emitter category to identify particular aircraft or vehicle types (values A0 - D7) (2.2.3.2.5.2)
- Set A: Light, Small, Large, High Vortex Large, High Performance, Rotorcraft
- Set B: Glider, Lighter than Air, Parachutist, Ultralight, Unmanned Areal Vehicel, Space/Transatmospheric vehicle
- Set C: Emergency Vehicle, Service Vehicle, Obstruction
- Set A:
1 Light, 2 Small, 3 Large, 4 High Vortex Large, 5 Heavy, 6 High Performance, 7 Rotorcraft
- Set B:
1 Glider,2 Lighter than Air, 3 Parachutist, 4 Ultralight, 6 Unmanned Areal Vehicel, 7 Space/Transatmospheric vehicle
- Set C:
1 Emergency Vehicle, 2 Service Vehicle, 3..5 Obstruction
- Set D: Reserved
* nav_qnh: altimeter setting (QFE or QNH/QNE), millibars
* nav_altitude: selected altitude
* nav_heading: selected heading
* nav_modes: ['autopilot', 'vnav', 'althold', 'approach', 'lnav', 'tcas']
* nav_modes: target state and status with 'autopilot', 'vnav', 'althold', 'approach', 'lnav', 'tcas'
* lat, lon: the aircraft position in decimal degrees
* nic: Navigation Integrity Category (2.2.3.2.7.2.6)
* rc: Radius of Containment in meters
* rc: Radius of Containment, (Rc)
is the radius that there is a 95% probability the aircraft is within that radius of its stated position,
both horizontally and vertically.
* seen_pos: how long ago (in seconds before "now") the position was last updated
* version: ADS-B Version Number 0, 1, 2 (3-7 are reserved) (2.2.3.2.7.5)
* nic_baro: Navigation Integrity Category for Barometric Altitude (2.2.5.1.35)
* nac_p: Navigation Accuracy for Position (2.2.5.1.35)
* nac_v: Navigation Accuracy for Velocity (2.2.5.1.19)
* sil: Source Integity Level (2.2.5.1.40)
probability of the reported horizontal position exceeding the radius of containment defined by the NIC
* sil_type: unknown, perHour, perSample
* gva: Geometric Vertical Accuracy (2.2.3.2.7.2.8)
* sda: System Design Assurance (2.2.3.2.7.2.4.6)
* mlat: list of fields based on MLAT e.g. ['lat', 'lon', 'nic', 'rc', 'nac_v']
* mlat: list of fields based on MLAT e.g. 'lat', 'lon', 'nic', 'rc', 'nac_v'
* tisb: ??? list of fields based on TIS-B ???
* messages: total number of Mode S messages received from this aircraft
* seen: how long ago (in seconds before "now") a message was last received from this aircraft