Shoreline Hidden Height Check
v1.4
Do distant shorelines or structures lose their lower sections first over water, as curvature predicts?
9 experiments
Repeatable Observation Guides
These experiments connect direct observations to calculations and globe-model predictions.
9 final
2 experiments
Curvature & Horizon
Earth bulge, line of sight, hidden height, and horizon geometry.
5 experiments
Sky, Moon & Latitude
Sun paths, seasons, stars, Moon orientation, and latitude-driven sky behavior.
Space Observation Calendar
v1.1
Do month-ahead astronomy calendars predict real sky events correctly when they are filtered for your location, local time, and hemisphere?
Sunspot Orientation Comparison
v1.0
At the same UTC moment, does the same sunspot pattern rotate with observer location the way globe-Earth viewing geometry predicts?
Moon Orientation Comparison
v1.0
At the same UTC moment, does the same Moon phase and landmark pattern rotate with observer location the way globe-Earth viewing geometry predicts?
2 experiments
Satellites & GNSS
Orbits, passes, dish geometry, and live positioning signals.
Satellite Radio SDR Capture
v1.1
Can you capture a satellite radio downlink with a receive-only SDR at the predicted pass time, frequency, and sky direction the way orbital geometry predicts?