Link margin

Margin = CN0 − CN0_req [dB-Hz].

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

Formula

M = CN0 − CN0_req

RF link margin

Primary sources

• NASA Glenn Research Center: Beginner’s Guide to Aeronautics (NASA GRC): Ideal rocket equation, specific impulse, thrust equation, dynamic pressure education pages.
• Free-space path loss (Friis / ITU-style FSPL) (ITU / standard radio engineering): L_fs = 20 log10(d_km) + 20 log10(f_MHz) + 32.44 dB form used in educational link budgets.

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.