Tools
Working utilities, listed only once they work. Each one states plainly whether it talks to the GDS Physics engine or runs entirely in your browser — that distinction decides whether a result carries an execution certificate, so it is never left to be inferred.
Geodesic Trajectory & Results Explorer. Runs entirely in the browser tab, and reads two shapes of file. Give it an ephemeris or a Monte Carlo ensemble and you get the orbital views: play a 400-day arc back at any rate you can think in, inject a disturbance part-way through and solve the correction that pulls it back. Give it a results table from a run made elsewhere — step size against error, a reference column beside the one being checked, residuals over time — and every column becomes a channel you can plot, difference and read off.
It explores results; it does not produce them. Nothing here re-runs a check or re-derives a number, so a value you read off is only ever as good as the run that wrote the file.
It does not contact the API. The page is served with connect-src 'none', so the browser refuses every outbound request it could attempt; the file you open is never uploaded, never stored, and gone on refresh. Its propagator is JavaScript written for interactivity, not the compiled core engine, so nothing it produces carries an execution certificate. For signed results, call the API.
Open the sandbox →Operation manual — every control explained, how to run a test, the plan-language reference, and what each diagnostic means.
Nothing else is listed here yet. A placeholder — an invented utility, a screenshot of something that does not run — would be indistinguishable from real content to anyone reading the page, and this platform publishes what it can stand behind or publishes nothing.
Entries read PENDING until there is something here to use, the same convention every unmeasured value on this site follows.