This version of readsb is licensed under the GPL, v3 or any later version.

Please see the individual source files and the file COPYING
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Copyright (c) 2020 Matthias Wirth <matthias.wirth@gmail.com>

Copyright (c) 2019 Michael Wolf <michael@mictronics.de>

This source code incorporates work that was released under GPL, v2
or later license. For unmodified versions of the original work that
may be used under the terms of that license, please see
https://github.com/flightaware/dump1090

The source code also incorporates work that was released under a
BSD-style license, reproduced below. For unmodified versions
of the original work that may be used under the terms of that
license, please see https://github.com/antirez/dump1090 and
https://github.com/MalcolmRobb/dump1090.

Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>

All rights reserved.

Redistribution and use in source and binary forms, with or without
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 *  Redistributions of source code must retain the above copyright
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