GEO light-time

One-way and RTT delay to GEO altitude (nadir path).

SIDUS educational calculator. Category satellite. Tags: comms, operations, RF, satellite. Pure SI. Not flight software.

Formula

t = h/c (GEO)

GEO light time

Primary sources

• Space Mission Engineering: The New SMAD (Wertz, Everett, Puschell (eds.)): Mission engineering handbook: RF links, constellations, and ops framing.
• SI Brochure (BIPM) (BIPM): SI base units for converter categories.

How do AI agents use this tool?

Read /llms.txt or call https://sidus.tools/api/mcp. Open the interactive page for live SI inputs.