Legal Disclaimer
Copyright Notice
Launch Ascent And Vehicle Aerodynamics (LAVA)
Copyright © 2026 United States Government as represented by the Administrator of the National Aeronautics and Space Administration. All Rights Reserved.
Notices
LAVA is provided as a research-oriented computational framework without any express or implied warranties. The accuracy, reliability, and applicability of results generated by LAVA—including all solvers, modules, and post-processing tools—depend on the user's modeling choices, input data, and verification efforts.
By using this software, you acknowledge that you are solely responsible for validating results and ensuring their suitability for your intended purpose. NASA, the LAVA development team, and all contributors or distributing parties assume no liability for any outcomes, damages, or losses arising from the use or misuse of this software.
See the related Software Usage Agreement/License for additional disclaimer, waiver and other liability provisions that apply to the software.
This software may only be used, reproduced, and provided to others as permitted under the terms of the agreement under which it was acquired from the U.S. Government. Otherwise, this software may not be redistributed, shared, or transferred to any unauthorized third parties without explicit permission from the appropriate NASA authorities. Neither title to, nor ownership of, the software is hereby transferred. This notice shall remain on all copies of the software.
Disclaimers
THE SOFTWARE AND/OR TECHNICAL DATA ARE PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY THAT THE SOFTWARE AND/OR TECHNICAL DATA WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT THE SOFTWARE AND/OR TECHNICAL DATA WILL BE ERROR FREE, OR ANY WARRANTY THAT TECHNICAL DATA, IF PROVIDED, WILL CONFORM TO THE SOFTWARE. IN NO EVENT SHALL THE UNITED STATES GOVERNMENT, OR ITS CONTRACTORS OR SUBCONTRACTORS, BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, OR IN ANY WAY CONNECTED WITH THIS SOFTWARE AND/OR TECHNICAL DATA, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT OF THE RESULTS OF, OR USE OF, THE SOFTWARE AND/OR TECHNICAL DATA.
THE UNITED STATES GOVERNMENT DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING THIRD PARTY COMPUTER SOFTWARE, DATA, OR DOCUMENTATION, IF SAID THIRD PARTY COMPUTER SOFTWARE, DATA, OR DOCUMENTATION IS PRESENT IN THE NASA SOFTWARE AND/OR TECHNICAL DATA, AND DISTRIBUTES IT "AS IS."
RECIPIENT AGREES TO WAIVE ANY AND ALL CLAIMS AGAINST THE UNITED STATES GOVERNMENT AND ITS CONTRACTORS AND SUBCONTRACTORS, AND SHALL INDEMNIFY AND HOLD HARMLESS THE UNITED STATES GOVERNMENT AND ITS CONTRACTORS AND SUBCONTRACTORS FOR ANY LIABILITIES, DEMANDS, DAMAGES, EXPENSES OR LOSSES THAT MAY ARISE FROM RECIPIENT'S USE OF THE SOFTWARE AND/OR TECHNICAL DATA, INCLUDING ANY DAMAGES FROM PRODUCTS BASED ON, OR RESULTING FROM, THE USE THEREOF.
IF RECIPIENT FURTHER RELEASES OR DISTRIBUTES THE NASA SOFTWARE AND/OR TECHNICAL DATA, RECIPIENT AGREES TO OBTAIN THIS IDENTICAL WAIVER OF CLAIMS, INDEMNIFICATION AND HOLD HARMLESS AGREEMENT WITH ANY ENTITIES THAT ARE PROVIDED WITH THE SOFTWARE AND/OR TECHNICAL DATA.
Third-Party Software
LAVA includes the following third-party software components:
1. BVH
Copyright © 2022 Arsène Pérard-Gayot MIT License https://github.com/madmann91/bvh/blob/master/LICENSE.txt
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE 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. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
2. kdtree
Copyright © 2007-2011 John Tsiombikas nuclear@member.fsf.org BSD License https://github.com/jtsiomb/kdtree?tab=License-1-ov-file#readme
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.
- The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 AUTHOR 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.
3. libyaml
Copyright © 2017-2020 Ingy döt Net Copyright © 2006-2016 Kirill Simonov MIT License https://github.com/yaml/libyaml/tree/master?tab=MIT-1-ov-file#readme
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE 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. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
4. Geogram
Copyright © 2000-2022 Inria All rights reserved. BSD License https://github.com/BrunoLevy/geogram?tab=License-1-ov-file#readme
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 Inria nor the names of its 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 COPYRIGHT HOLDER OR 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.
5. yaml-cpp
Copyright © 2008-2015 Jesse Beder MIT License https://github.com/jbeder/yaml-cpp?tab=MIT-1-ov-file#readme
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE 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. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
6. Pyoptsparse
LAVA uses Pyoptsparse, a third-party library licensed under LGPL License 3.0.
For the complete text of the GNU Lesser General Public License v3.0 and GNU General Public License v3.0, please visit: - LGPL v3: https://www.gnu.org/licenses/lgpl-3.0.html - GPL v3: https://www.gnu.org/licenses/gpl-3.0.html
7. Intel MKL
The LAVA executables compiled with Intel compilers statically link MKL which is distributed under the Intel Simplified Software License (Version October 2022)
PIN: Copyright (C) Intel Corporation
Use and Redistribution. You may use and redistribute the software, which is provided in binary form only, (the "Software"), without modification, provided the following conditions are met:
- Redistributions must reproduce the above copyright notice and these terms of use in the Software and in the documentation and/or other materials provided with the distribution.
- Neither the name of Intel nor the names of its suppliers may be used to endorse or promote products derived from this Software without specific prior written permission.
- No reverse engineering, decompilation, or disassembly of the Software is permitted, nor any modification or alteration of the Software or its operation at any time, including during execution.
No other licenses. Except as provided in the preceding section, Intel grants no licenses or other rights by implication, estoppel or otherwise to, patent, copyright, trademark, trade name, service mark or other intellectual property licenses or rights of Intel.
Third party software. "Third Party Software" means the files (if any) listed in the "third-party-software.txt" or other similarly-named text file that may be included with the Software. Third Party Software, even if included with the distribution of the Software, may be governed by separate license terms, including without limitation, third party license terms, open source software notices and terms, and/or other Intel software license terms. These separate license terms solely govern Your use of the Third Party Software.
DISCLAIMER. THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT ARE DISCLAIMED. THIS SOFTWARE IS NOT INTENDED FOR USE IN SYSTEMS OR APPLICATIONS WHERE FAILURE OF THE SOFTWARE MAY CAUSE PERSONAL INJURY OR DEATH AND YOU AGREE THAT YOU ARE FULLY RESPONSIBLE FOR ANY CLAIMS, COSTS, DAMAGES, EXPENSES, AND ATTORNEYS' FEES ARISING OUT OF ANY SUCH USE, EVEN IF ANY CLAIM ALLEGES THAT INTEL WAS NEGLIGENT REGARDING THE DESIGN OR MANUFACTURE OF THE SOFTWARE.
LIMITATION OF LIABILITY. IN NO EVENT WILL INTEL 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.
No support. Intel may make changes to the Software, at any time without notice, and is not obligated to support, update or provide training for the Software.
Termination. Your right to use the Software is terminated in the event of your breach of this license.
Feedback. Should you provide Intel with comments, modifications, corrections, enhancements or other input ("Feedback") related to the Software, Intel will be free to use, disclose, reproduce, license or otherwise distribute or exploit the Feedback in its sole discretion without any obligations or restrictions of any kind, including without limitation, intellectual property rights or licensing obligations.
Compliance with laws. You agree to comply with all relevant laws and regulations governing your use, transfer, import or export (or prohibition thereof) of the Software.
Governing law. All disputes will be governed by the laws of the United States of America and the State of Delaware without reference to conflict of law principles and subject to the exclusive jurisdiction of the state or federal courts sitting in the State of Delaware, and each party agrees that it submits to the personal jurisdiction and venue of those courts and waives any objections. THE UNITED NATIONS CONVENTION ON CONTRACTS FOR THE INTERNATIONAL SALE OF GOODS (1980) IS SPECIFICALLY EXCLUDED AND WILL NOT APPLY TO THE SOFTWARE.
8. Intel runtime libraries
The LAVA executables compiled with Intel compilers statically link the Intel runtime libraries - Intel® Fortran Core Library (libifcoremt) - Intel® Math Library (libimf) - Intel® OpenMP Runtime Library (libiomp5) - Intel® Runtime Core Library (libirc) - Intel® Random Number Generator Library (libirng) - Intel® Short Vector Math Library (libsvml)
These components are Copyright © 2026 Intel Corporation. All rights reserved.
These libraries are provided by Intel Corporation under the "Intel End User License Agreement for Developer Tools." Redistribution and use in binary form, without modification, are permitted provided that the following conditions are met:
- 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.
- No reverse engineering, decompilation, or disassembly of these libraries is permitted.
- Neither the name of Intel Corporation nor the names of its suppliers may be used to endorse or promote products derived from this software without specific prior written permission.
DISCLAIMER: THIS SOFTWARE IS PROVIDED BY INTEL "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 INTEL 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.