Ground track

Lat/lon samples of a satellite ground track on an equirectangular map (SGP4 or spherical Kepler).

SIDUS educational calculator. Category satellite. Tags: earth-observation, geo, operations, satellite. Pure SI. Not flight software.

Formula

φ(t), λ(t) · SGP4 or Kepler

Ground track lat/lon samples

Primary sources

satellite.js (MIT License): Browser SGP4/SDP4 propagation library used by SIDUS satellite tools.
Fundamentals of Astrodynamics and Applications (David A. Vallado): Standard reference for two-body, Lambert, maneuvers, and J2. Equations implemented independently in SIDUS.
CelesTrak™ (CelesTrak™): TLE sets, NORAD element documentation, and Vallado software companion hosting.

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.

Open interactive tool · SIDUS