Skip to the tool

📡 Deep-Space Communications Planner

📡 Deep-Space Communications Planner

Turn range into one-way light time, round-trip conversation delay, file-transfer finish time and free-space path loss. Useful for planning when a crew cannot wait for real-time help from Earth.

Illustrative ranges · actual geometry changes continuously
One-way light time
—
Signal round trip
—
Earliest considered reply
—
Last file bit arrives
—
—
—

Vacuum light time uses c = 299,792.458 km/s. Free-space path loss excludes antenna gain, pointing, atmosphere, noise, coding and hardware losses; data time excludes protocol overhead and outages.

More in Astronomy & Space

📦 Astronaut Crew Consumables Planner Turn crew size and mission duration into a first-pass launch mass for water, food, oxygen and daily supplies. Every…
🪐 Astronaut Hohmann Transfer Planner Estimate the two burns, coast time, departure phase angle and repeat opportunity for a coplanar Hohmann transfer…
🧑‍🚀 EVA Timeline & Consumables Check a spacewalk timeline against oxygen, carbon-dioxide removal, battery and cooling endurance. The tightest resource…
🫸 Microgravity Push-Off Planner Model a controlled push across a cabin: impulse sets speed, distance sets coast time, and the same momentum must be…
🌀 True Scale of Space Every body is drawn at its real size and real distance — no compression. Start at the Earth–Moon system (the Moon's…
🪐 3D Solar System Orrery A real 3D orrery of the whole solar system with true orbital mechanics — Kepler's equation is solved every frame, so…
🌫️ Airmass & Extinction Calculator How much of a star's light the atmosphere is stealing at any altitude, in which band, and how long you have before it…
🌀 Astronaut Artificial Gravity Calculator Explore rotating habitats and short-arm centrifuges. Calculate floor gravity, rotation period, rim speed, target RPM…

All 36 tools in Astronomy & Space →