Backyard Roll-Off Observatory Concrete-Pier Eigenfrequency & Horizon Cutoff Sizer

Deterministic Cantilevered steel/concrete pier + tip-mass Rayleigh eigenfrequency f_1 + GEM meridian-flip collision sphere & celestial declination altitude cutoff engine (.dxf, .svg, .pdf, .json) built for PlaneWave, Software Bisque, ZWO, NexDome — zero-upload ephemeral Wasm RAM execution.

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