Is this flight software?

No. SIDUS models are educational reimplementations. Cross-check before any flight decision.

Inclination change

Pure plane-change Δv at orbital speed (combined with Hohmann optional later).

SIDUS educational calculator. Category orbital. Tags: delta-v, maneuver, orbital. Pure SI. Not flight software.

Δv = 2 v sin(Δi / 2)

Pure inclination change cost

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.
AeroVia Aerospace Tools (AeroVia (public calculators)): Public catalog of ISA, dynamic pressure, launch azimuth, RF link, SSO-class tools (domain demand reference).

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