Hi Product Hunt 👋

GNSS (GPS, Galileo, BeiDou, GLONASS) quietly runs ports, airports, telecom networks, power grids and spacecraft, and it is being jammed and spoofed more often every year. Most teams only find out how their system behaves when it actually happens.

Kshana lets you rehearse that minute in advance. It's an open-source simulator, written in Rust, for positioning, navigation and timing when GNSS is jammed, spoofed or lost:

🛰️ 92 scenario kinds, from RF interference and spoofing detection to clock holdover, integrity, LEO and lunar navigation

🌐 Kshana Studio runs the whole engine in your browser (WebAssembly). Nothing to install, nothing uploaded

🧾 Every figure carries a label saying how it was checked: 176 of 401 capabilities are validated against independent references, 221 are openly marked as modelled, and the misses are published rather than hidden

🔁 Reproducible: the same scenario, seed and engine version give the same bits

🧰 CLI, Rust crate, Python and npm packages, plus an MCP server for AI assistants

🌍 Site, Studio and engine text in 18 languages (machine-translated and labelled as such)

New in 0.40: a mission thread that chains the navigation error budget from launch to landing and names the weakest link, measured clock logs driving holdover, and an emitter-region estimate from aircraft and ship reports.

It's free under AGPL-3.0, with a commercial licence and Kshana Pro for teams that need design optimisation, uncertainty analysis and review-ready dossiers.

I'd love to hear where it breaks for your use case, and which scenario you'd want next.

Advisory software for study and trade-offs; not type-approved navigation equipment.

Label	URL
Website	https://kshana.dev
Try it (Studio)	https://kshana.dev/studio/
GitHub	https://github.com/ashfordeOU/kshana
Docs	https://kshana.dev/docs/
Cite (DOI)	https://doi.org/10.5281/zenodo.20528627