Object view
Apparent Earth size or a constant telescope scale, real day/night illumination, persistent station events and an impact endpoint.
Target-Earth for Windows
Views and source-backed geometry
Four complementary views keep physical state, observation events and uncertainty explicit.
Free 3D and stereo
Mono, LR and RL rendering with mouse rotation and zoom. The default camera begins at the small object's viewpoint.
Mollweide
A global surface projection centred at the sub-object longitude, with the terminal impact point shown explicitly.
Earth-relative trajectory
A segmented Hermite trajectory with hourly labels, real Earth occlusion and observation-time station connectors.
Fail-closed precision
Position and velocity are interpolated together only inside source-coherent segments. Independent frames are never joined for appearance. Missing precise states remain visibly unavailable. Validation covers time monotonicity, position, tangent continuity, centre error, projected pixel continuity and terminal impact geometry.