This package is a set of tools and libraries derived from https://github.com/etdey/gdl90. A replay file was added for csv-Files coming from Garmin Aviation devices like G1000. In addition the scripts are (at least partially) migrated to Python 3.x.

The package requires Python 3.x and makes use of the Python Standard Library for all functions except where noted. The primary tool components are:

• simulate_GarminFromFile.py -- takes a Garmin csv-File and simulate a ADS-B hardware with this data
• gdl90_receiver.py -- receives a live or recorded data stream from ADS-B hardware
• gld90_recorder.py -- records the raw data stream from ADS-B hardware to file
• gld90_sender.py -- sends a previously recorded data stream to network

The gdl90 subdirectory contains the libraries for decoding and encoding the GDL 90 and UAT messages.

This simulator takes a CSV-File from a Garmin Aviation Device (e.g. G1000) and replays the flight data as simulated ADS-B hardware (although without traffic information).

$ ./simulate_GarminFromFile.py --help
Usage: simulate_GarminFromFile.py {requiredOptions} [otherOptions]

Options:
  -h, --help            show this help message and exit
  -v, --verbose         Verbose reporting on STDERR
  -f FILE, --file=FILE  input file (default=STDIN)
  -c CALLSIGN, --callsign=CALLSIGN
                        Aeroplane Callsign (default=DEUKN)

  Optional:
    -s SPEEDFACTOR, --speedfactor=SPEEDFACTOR
                        time lapse factor (default=5.0)
    -d IP, --dest=IP    destination IP (default=255.255.255.255)
    -p NUM, --port=NUM  destination port (default=43211)

## Receiver

The receiver can be used decode a live data stream or process a recorded GLS 90
file. The output is a line-by-line decoding of the individual message types,
including the optional UAT messages, or a compact text record format that
allows for automated processing.

$ ./gdl90_receiver.py --help Usage: gdl90_receiver.py {requiredOptions} [otherOptions]

GDL-90 Receiver is a data receiver and decoder.

Options: --version show program's version number and exit -h, --help show this help message and exit -v, --verbose Verbose reporting on STDERR

Optional: -p NUM, --port=NUM receive port (default=43211) -s BYTES, --maxsize=BYTES maximum packet size (default=9000) -r PACKETS, --reportcount=PACKETS report after receiving this many packets (default=100) -i FILE, --inputfile=FILE read from input file instead of network --date=YYYY-MM-DD UTC starting date for data (default=now) --plotflight output plotflight format --uat output UAT messages

The decoding library makes use of a non-standard MSG101 from the SkyRadar
hardware for time-of-day (hh:mm) since the MSG00 timestamp is not usable as
defined in the GDL 90 protocol. Since seconds information is not available when
using the SkyRadar hardware, the decoding library self-corrects its internal
estimation of the number of seconds past the minute as messages are received.

Example usage:

$ ./gdl90_receiver.py -i skyradar.20121028.001 --plotflight > ../KML/PlotFlight/skyradar.track.20121028.001.txt

## Recorder

The recorder captures the raw data stream from an ADS-B device and saves it to
a file. It is designed to be run within a device like the RaspberryPi attached
to a wifi network within an aircraft. The raw files are later downloaded and
processed by the `gdl90_receiver.py` program.

The recorder has a dependency on the `netifaces` package for Python. This can
be installed on your target system with the command:

sudo pip install netifaces

When running the recorder in a head-less device like the RPi, this should be
run as root with the ability to automatically start and restart. An
`/etc/inittab` entry such as this accomplishes these needs:

#Run GDL90 recorder fdr1:23:respawn:/usr/bin/python /root/gdl90_recorder.py --slowexit

The `--slowexit` option should be used when running from inittab in order to
prevent init from disabling respawns at boot time when the wifi network is
still initializing. Until a valid network interface exists, the recorder will
exit and needs to be restarted.

$ ./gdl90_recorder.py --help Usage: gdl90_recorder.py {requiredOptions} [otherOptions]

GDL-90 Recorder is a data receiver.

Options: --version show program's version number and exit -h, --help show this help message and exit -v, --verbose Verbose reporting on STDERR --slowexit Delay error exit for 15 seconds

Optional: --interface=name receive interface name (default=) -p NUM, --port=NUM receive port (default=43211) -s BYTES, --maxsize=BYTES maximum packet size (default=1500) --dataflush=SECS seconds between data file flush (default=10) --logprefix=PATH path prefix for log file names (default=/root/skyradar) --rebroadcast=name rebroadcast interface (default=off)

## Sender

The sender is useful for replaying a previously recorded data stream from an
ADS-B hardware device. This can be used for testing an application or the
decoder library.

$ ./gdl90_sender.py --help Usage: gdl90_sender.py {requiredOptions} [otherOptions]

GDL-90 Sender transmits data to the network.

Options: --version show program's version number and exit -h, --help show this help message and exit -v, --verbose Verbose reporting on STDERR -f FILE, --file=FILE input file (default=STDIN)

Optional: -d IP, --dest=IP destination IP (default=255.255.255.255) -p NUM, --port=NUM destination port (default=43211) -s BYTES, --size=BYTES packet size (default=50) --delay=MSEC time between packets (default=10)