Pytheia 2.0.0 — Telescope pointing analysis

Pointing analysis, with the details in view.

Two mount conventions

Analyze altitude–azimuth and equatorial observations, with latitude specified for HA/Dec mode.

First-order and rigorous fitting

Compare the linear approximation with an iterated Bayesian MAP fit using full rotations.

Useful diagnostics

Inspect fitted coefficients, uncertainties, correlations, residuals, and convergence. Add your own terms in the editable additional-term file.

WINDOWS · 64-BIT

Download Pytheia 2.0.0

Currently available for Windows 64-bit. Contact Orionis to express interest in Linux or macOS availability.

The complete package includes its own Python runtime and dependencies. Extract the entire ZIP before running it. A separately issued signed evaluation licence is required.

Download Windows ZIP · 103.89 MB Download checksum Windows setup guide

Verify the download

In PowerShell, run:

Get-FileHash .\Pytheia200_Evaluation_WINDOWS_FINAL_26L28U.zip -Algorithm SHA256

Compare the result with this SHA-256:

9401C7CA3F8F706DE7F3745A830B8820C3A98CC58C6D9D50023F3CC894B55504

PERSONALIZED EVALUATION

Request your 30-day licence.

Email Orionis with the name to appear after Licensed to. This may be an individual or an institution. For an institution, include a contact person and reply address.

Open licence-request email

This opens your email application; you review and send the request. If no email app opens, write to contact@orionisgroup.com with the subject “Pytheia 2.0.0 evaluation request”.

How the period works

30 UTC calendar days, beginning on the UTC issuance date. Expiry is at 00:00 UTC on the exclusive expiry date shown in the signed licence.

The clock starts on issuance, not installation or first use. Orionis supplies the signed licence, signature, and agreement identifying your name and period.

Commercial licensing and support arrangements are handled separately through Orionis.

Start with the reference dataset.

The bundled example has 120 observations and eight fitted terms. Its converged rigorous total RMS is 2.5608 arcseconds. This is a reference result for that dataset, not an accuracy guarantee for another telescope.

Validated release package

The scientific core passed 41 preserved tests. The Windows package was extracted and activated on a second computer using its bundled runtime. Reports and recipient attribution were checked.

Known runtime warning

Some calculations display a pandas chained-assignment warning. The preserved scientific tests and reference results pass with the warning present. It is documented in the package release notes.

Questions before you start?

Do I need to install Python?

No. The Windows package includes an isolated Python runtime and the required dependencies. Keep every package folder together.

Where do I change the model settings?

Edit settings.ini. You can also pass a different settings file to Pytheia200.exe. The Windows setup guide gives both commands.

What happens when the licence expires?

Licensed calculations stop. The evaluation agreement describes your rights and obligations, including retention of your data, independently written terms, and generated reports.

Are older downloads still available?

Yes. Pytheia100 v1.1.0 and v1.0.0 remain on their previous-release pages.