Site & date navigator
Compare the opportunity. Then audit the answer.
Explore three supported de Gerlache candidate sites. See when the Sun and Earth are above the modeled horizon, then compare sites or dates.
Study interval: 6–28 November 2026 UTC · snapshots every 30 minutes · observer 2 m above each site’s nominal Product 78 surface.
dGR101
88.5134° S · 68.0146° W
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Save a site and UTC snapshot, change the site or date, then save another. All timelines use the same study interval. Different validation depth and terrain sampling remain visible. Saved comparisons last while this page stays open.
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Scope & scientific limits
- Three coverage-limited research sites, not a global site search or a site recommendation.
- Snapshots are precomputed at exact 30-minute UTC steps. The browser does not interpolate celestial geometry.
- Timelines copy frozen event-refined intervals. Snapshot spacing is not event-time precision.
- Remaining overlap is precomputed by subtracting the snapshot ET from its frozen simultaneous-interval endpoint; clipped endpoints remain clipped.
- Durations are clipped to Nov 6–28, 2026 UTC. Censored endpoints are not physical rise/set events.
- Sun visibility indicates geometric illumination opportunity, not generated power. Earth visibility is not a link budget or guaranteed communication.
- The local 5 m grid uses unchanged 80/240 m exterior terrain to 250 km. Grid spacing does not certify accuracy.
- The multisite cohort has unequal refinement and validation depth. Detailed representation auditing is available only at dGR101.
NASA data: Product 78 · Product 90 · JPL ephemerides