LICENSE

InSAR.dev Source-Available License
Version 1.0

SPDX-License-Identifier: InSARdev-SAL-1.0

This is a source-available license and is not an OSI-approved open source license.

Copyright (c) 2025 Aleksei Pechnikov (Alexey Pechnikov)
ORCID: https://orcid.org/0000-0001-9626-8615
Contact: alexey@pechnikov.dev

1. DEFINITIONS

"Copyright Holder" means Aleksei Pechnikov (Alexey Pechnikov), as identified
in the copyright notice above.

"Software" means the source code, object code, documentation, and any
accompanying materials provided under this license.

"Derivative Works" means modifications to, or works based on, the Software.

"Non-Commercial Use" means use by individuals exclusively for:
  - Personal learning and self-education
  - Academic coursework, thesis, or dissertation work without external funding
  - Hobby projects with no commercial intent or funding
  - Teaching and classroom instruction at educational institutions (not
    commercial training services)
  - Non-commercial workshops or community education

Non-Commercial Use explicitly excludes any use where the Software or its
outputs contribute to funded research, commercial projects, consulting work,
or revenue-generating activities.

"Commercial Use" means any use that does not qualify as Non-Commercial Use,
including but not limited to:
  - Any use in connection with employment or business activities
  - Any use in grant-funded, institutionally funded, or government-funded research
  - Any use by or on behalf of a corporation, organization, or institution
  - Any use in consulting, contracted work, or paid professional services
  - Academic work where the researcher receives funding related to the work

"Cloud Service" means offering the Software's functionality to third parties
as a hosted service, including but not limited to:
  - SaaS, PaaS, or managed service platforms
  - API wrappers or endpoints exposing the Software's functionality
  - Hosted notebooks, computing environments, or processing pipelines
  - Any service where users interact with the Software over a network
    without obtaining their own license

"Active Subscription" means a paid subscription through an Authorized Subscription
Channel that is active and has not been canceled. Commercial Use rights are
granted only while the subscription remains active. If the subscription is
canceled or becomes inactive (including due to nonpayment, chargeback, fraud
flags, or account suspension by the channel), Commercial Use rights terminate
immediately. Individuals requiring subscriptions include both employees and
contractors.

"Authorized Subscription Channel" means Patreon (https://www.patreon.com/pechnikov)
or any other subscription method listed in the SUBSCRIBE file (the "Subscription
Page"). The Copyright Holder may add or remove Authorized Subscription Channels
by updating the Subscription Page. Such changes do not modify other terms of
this license. Removal of an Authorized Subscription Channel does not affect
subscriptions already paid and active through that channel until the end of the
Paid Period.

"Paid Period" means the billing period already paid for through an Authorized
Subscription Channel.

"Integrate" means embedding or bundling the Software into a product or service
that is distributed, licensed, or made available to third parties. Internal use
(such as internal Docker images or research pipelines not exposed to third
parties) does not constitute integration.

2. GRANT OF RIGHTS

Subject to the terms of this license, you are granted a non-exclusive,
non-transferable, revocable license to use, copy, and modify the Software
as follows:

(a) Non-Commercial Use: You may use, copy, and modify the Software at no
    cost for Non-Commercial Use.

(b) Commercial Use: You may use the Software for Commercial Use only if you
    maintain an Active Subscription. Each individual using the Software for
    Commercial Use requires their own Active Subscription. Access to or use of
    the Software for Commercial Use is permitted only for individuals with their
    own Active Subscription. This grants internal use rights only; integration
    into products or services requires a separate agreement (see Section 3(c)).

(c) Cloud Service Use: You may NOT offer the Software as a Cloud Service
    without a separate cloud license agreement. Contact: alexey@pechnikov.dev

3. RESTRICTIONS

You may NOT:

(a) Remove or alter any copyright notices, license terms, or attribution
    from the Software.

(b) Redistribute the Software or Derivative Works except as permitted under
    Section 4.

(c) Integrate the Software into any commercial product or service without
    a separate written agreement.

(d) Sublicense, sell, or resell the Software.

(e) Represent that you have any ownership rights in the Software.

4. PERMITTED REDISTRIBUTION (NON-COMMERCIAL ONLY)

(a) Unmodified Source: You may redistribute unmodified copies of the Software
    for Non-Commercial purposes, provided you include all copyright notices,
    this license, and attribution to the original author.

(b) Modified Source: You may redistribute modified versions of the Software
    for Non-Commercial purposes, provided you:
    - Include all original copyright notices and this license
    - License the modified source under this same license
    - Clearly mark your modifications and indicate that changes were made
    - Include attribution to the original author
    - Do not misrepresent the modified version as the original Software

(c) Binary Distribution: You may distribute compiled binaries (including wheels
    or other packaged distributions) of the Software for Non-Commercial purposes
    only if you also provide the complete corresponding source code under this
    same license.

(d) Commercial Redistribution: Any redistribution for Commercial purposes
    requires a separate written agreement. Contact: alexey@pechnikov.dev

5. NO EXTERNAL CONTRIBUTIONS

This project does not accept code contributions from third parties.

You may not submit pull requests, patches, or other modifications for inclusion
in the Software unless you have a separate written agreement with the Copyright
Holder.

Any unsolicited contributions submitted without such an agreement are not
licensed to the Copyright Holder and will not be used, merged, or distributed
as part of the Software.

Bug reports and suggestions are welcome via the project's issue tracker.

6. TRADEMARKS AND ENDORSEMENT

This license does not grant any rights to use the name "InSAR.dev", the
InSAR.dev logo, or any other trademarks or trade names of the Copyright Holder,
except as required for reasonable and customary attribution as permitted under
Section 7.

You may not use the Copyright Holder's name to endorse or promote products
derived from the Software without prior written permission.

7. ATTRIBUTION

Any permitted redistribution of the Software or Derivative Works must include
clear attribution to the original author and a copy of this license.

Attribution is also requested (but not required) in publications, presentations,
or other works describing results produced using the Software.

8. TERMINATION

This license is effective until terminated. If you fail to comply with any
term of this license, you will be notified in writing and given 30 days to
cure the violation. If the violation is not cured within 30 days, your rights
under this license terminate automatically. Upon termination, you must cease
all use and destroy all copies of the Software under your control, except
archival backups kept in the ordinary course of business, which must not be
restored or used except to comply with legal obligations.

Notwithstanding the above, termination is immediate and without cure period
for violations involving unauthorized Cloud Service use, unauthorized
redistribution, or sublicensing.

9. DISCLAIMER OF WARRANTY

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. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU.

10. LIMITATION OF LIABILITY

IN NO EVENT SHALL THE COPYRIGHT HOLDER (AS DEFINED ABOVE) 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.

11. SEVERABILITY

If any provision of this license is held to be unenforceable or invalid, that
provision shall be modified to the minimum extent necessary to make it
enforceable, and the remaining provisions shall continue in full force and effect.

12. NO PATENT RIGHTS

No patent rights are granted under this license. This license does not provide
any express or implied rights to any patents owned or controlled by the
Copyright Holder.

13. ENTIRE AGREEMENT

This license constitutes the entire agreement between you and the Copyright
Holder concerning the Software and supersedes all prior agreements and
understandings.

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QUICK REFERENCE

Free for:
  - Students, educators, and classroom teaching
  - Personal learning and hobby projects
  - Unfunded academic coursework, thesis, or dissertation work
  - Non-commercial workshops and community education

Subscription required for:
  - University or institutional research (including grant-funded)
  - Business, consulting, or professional use
  - Government or corporate projects
  - Subscription grants internal use only; product integration and Cloud
    Service require separate written permission

  See SUBSCRIBE file for subscription options

Not permitted without written permission:
  - Cloud/SaaS/hosted service offerings
  - Resale, sublicensing, or product integration
  - Commercial redistribution

  Contact: alexey@pechnikov.dev

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API SERVICES

The Cache APIs at insar.dev (Sentinel-1 via NASA ASF and Copernicus, and NASA
NISAR) are subject to the same licensing terms as the insardev library.

Free for non-commercial use:
  - Personal learning and self-education
  - Unfunded academic coursework, thesis, or dissertation work
  - Hobby projects with no commercial intent
  - Teaching and classroom instruction

License required for funded academic, institutional, or professional use:
  - Grant-funded, institutional, or government-funded research
  - Business, consulting, or professional services
  - Corporate or organizational projects

For licensing, contact: alexey@pechnikov.dev