Earth Simulator

An interactive globe with a geodetic grid, sun/moon subpoints, and user-defined markers.

• Plot two custom lat/lon points with highlight rings.
• Inspect subsolar and sublunar points with day-side visibility overlays.
• Scrub date/time or jump by sidereal days to animate footprints.
• Toggle Sun/Moon overlays and view numeric subpoint readouts.
• Enable sun-synchronous camera to track the subsolar point.
• Use terminator view to stay centered on the dawn/dusk line.
• Show twilight bands with a configurable sun-below-horizon angle.