VRS X License Agreement

VRS X END USER LICENSE AGREEMENT Copyright (C) 2026 ADS-B.Pro - Bruno Stelmaszyk All rights reserved. IMPORTANT: READ CAREFULLY BEFORE USING THIS SOFTWARE. 1. DEFINITIONS "Software" refers to VRS X, including all executable files, libraries, documentation, and embedded web interface components. "VRS X", "VRSX", and "VRS-X" are proprietary names and marks used by ADS-B.Pro. 2. GRANT OF LICENSE This software is provided as FREEWARE for personal and commercial use. You are granted a non-exclusive, non-transferable license to use the Software free of charge, subject to the following conditions. 3. RESTRICTIONS You may NOT: a) Modify, alter, adapt, or create derivative works of the Software, including but not limited to the source code, binaries, or web interface components. b) Reverse engineer, decompile, disassemble, or attempt to derive the source code of the Software, except to the extent expressly permitted by applicable mandatory law. c) Remove, alter, obscure, disable, or circumvent any copyright notices, author attributions, proprietary markings, or VRS X branding provided by the Software. Where custom branding is enabled through functionality provided by VRS X, all mandatory VRS X and ADS-B.Pro attribution elements displayed by the Software, including any "Powered by VRS X" attribution, must remain visible and unmodified. d) Use the names "VRS X", "VRSX", "VRS-X", or any confusingly similar names in connection with any other software or product without prior written permission. e) Redistribute modified versions of the Software. f) Sublicense, sell, rent, lease, or otherwise transfer rights to the Software. 4. PERMITTED USES You MAY: a) Use the Software for personal, educational, or commercial purposes. Commercial use may include deploying or operating VRS X as part of a commercial service, customer installation, monitoring environment, or professional solution. This permission does not grant the right to sell, sublicense, rent, lease, or charge a separate license fee for VRS X itself. b) Make copies of the Software for backup purposes. c) Redistribute the Software in its original, unmodified form, provided that this license agreement and all copyright, attribution, and proprietary notices are included. Redistribution does not transfer the distributor's license; each recipient receives the right to use VRS X directly under the terms of this agreement. 5. DISCLAIMER OF WARRANTY THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. THE AUTHOR MAKES NO GUARANTEES REGARDING THE ACCURACY, RELIABILITY, OR COMPLETENESS OF THE DATA DISPLAYED BY THE SOFTWARE. 6. LIMITATION OF LIABILITY IN NO EVENT SHALL ADS-B.PRO, BRUNO STELMASZYK, OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 7. TERMINATION This license is effective until terminated. Your rights under this license will terminate automatically without notice if you fail to comply with any of its terms. Upon termination, you must destroy all copies of the Software in your possession. 8. THIRD-PARTY CODE This Software contains code derived from Virtual Radar Server by Andrew Whewell, licensed under the BSD 3-Clause license. The original copyright notice, conditions, and disclaimer are provided in the BSD 3-Clause License section below. Nothing in this agreement restricts any rights granted to you under the BSD 3-Clause license with respect to the original Virtual Radar Server source code, which remains freely available from its original author. 9. GOVERNING LAW This agreement shall be governed by and construed in accordance with the laws of the Republic of Poland. By using VRS X, you acknowledge that you have read this agreement, understand it, and agree to be bound by its terms and conditions.

Third-Party Attributions

Virtual Radar Server

Copyright (C) 2010 onwards, Andrew Whewell. All rights reserved.

VRS X contains code derived from Virtual Radar Server, originally created by Andrew Whewell. The original work was ported from .NET Framework 4.6 to .NET 10.0. The original Virtual Radar Server is distributed under the BSD 3-Clause license, the full text of which is provided in the BSD 3-Clause License section below.

In accordance with the terms of the BSD 3-Clause license, the original copyright notice, list of conditions, and disclaimer are reproduced in the section below and retained in the headers of all derived source files.

Virtual Radar Server - BSD 3-Clause License

Copyright (C) 2010 onwards, Andrew Whewell All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the author nor the names of the program's contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OF THE SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Data Source Attribution

This software supports importing aircraft data from the OpenSky Network.

The OpenSky aircraft database is a crowdsourced resource provided "as is".

"Bringing Up OpenSky: A Large-scale ADS-B Sensor Network for Research"
Matthias Schäfer, Martin Strohmeier, Vincent Lenders, Ivan Martinovic, and Matthias Wilhelm.
In Proceedings of the 13th IEEE/ACM International Symposium on Information Processing in Sensor Networks (IPSN), pages 83-94, April 2014.

Visit: https://opensky-network.org

Questions?

If you have questions about this license or need permission for uses not covered here, please contact us at info@ads-b.pro.