Documentation

Help & User Manuals

Full section-by-section walkthroughs for each calculator — what every field means, how the live checks work, and how to read the 3D preview.

Dome Calculator Manual

Measurement worksheet, mount offset conventions, live dome-azimuth calculation, sky coverage sweep, meridian/celestial equator reference lines, and the local horizon model.

Read the Dome Manual →

Roll-Off-Roof Manual

Building & mount geometry, custom wall shapes, roof travel and roof-shape modeling, telescope swing-radius clearance, and the horizon-file export.

Read the ROR Manual →

Quick tips — both tools

The status banner at the top of each calculator is the fastest check — green means go, amber means something was auto-adjusted, red means look closer.
Both tools support Save Setup / Load Setup — export your configuration as a JSON file so you can pick up where you left off.
Both have a dark/light mode toggle in the header.
Nothing you enter is sent anywhere — both tools run entirely in your browser. See the Privacy Policy for details.