Credits

sattools-web reimagines existing free software for the web. This page mirrors the repository's ATTRIBUTIONS.md — attribution is a feature here, not a footnote.

Heritage

• sattools — Cees Bassa, GPL-2.0. The origin of every capability on this platform.
• sattools alpha5 fork — Eelke Visser. Alpha-5 catalog-number support.
• SGP4/SDP4 — Hoots, Roehrich, Vallado et al. (Spacetrack Report #3; AIAA 2006-6753).

Libraries

• cedar-solve and cedar-detect — Steven Rosenthal, Apache-2.0; forked from Tetra3 — European Space Agency.
• python-sgp4 and Skyfield — Brandon Rhodes, MIT.
• satellite.js — MIT. Astropy — BSD-3-Clause.
• FastAPI, Next.js, Celery, SQLAlchemy, Playwright.

Data providers

• CelesTrak — Dr. T.S. Kelso.
• Space-Track — accessed only with per-user credentials.
• Mike McCants — community element sets.
• SatNOGS DB — Libre Space Foundation.
• Hipparcos/Tycho-2 catalogs — European Space Agency.

sattools-web is free software (AGPL-3.0) by the Libre Space Foundation. Source: gitlab.com/librespacefoundation/sattools-web.