Elevation & azimuth
Topocentric elevation, azimuth (N→E), and slant range from site and target geodetic positions (spherical body).
SIDUS educational calculator. Category geometry. Tags: comms, geometry, GNC, pointing, trigonometry. Pure SI. Not flight software.
Formula
el, az from ENU · ρ = |r_tgt − r_site|
Topocentric elevation & azimuth
Primary sources
- Fundamentals of Astrodynamics and Applications (David A. Vallado): Standard reference for two-body, Lambert, maneuvers, and J2. Equations implemented independently in SIDUS.
- Orbital Mechanics for Engineering Students (Howard D. Curtis): Textbook derivations for Hohmann, vis-viva, rocket equation, elements.
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.