Earth from orbit — NASA Blue Marble

Products · Dynamics

Varaha Simulator

The propagation engine.

High-fidelity orbit propagation, from two-body to numerical Cowell with drag and SRP — five models on one truth, each run audit-tagged.

What it does

Simulator is the dynamics core of the suite. Choose the fidelity a task needs and it holds them all on one truth, recording exactly which forces produced every result — validated against the reference works the industry already trusts.

Five models

Two-body, secular J2, SGP4/SDP4, numerical Cowell (J2/J3/J4, drag, SRP, luni-solar) via Dormand-Prince 5(4), and ephemeris interpolation.

Audit trail

Each run records the exact forces and models that produced it, with its accuracy bounds stated.

Validated

Checked against Vallado, Montenbruck & Gill and Battin reference cases.

Deterministic

Order-preserving and seeded — identical results across machines and runs.

Relevant standards

Standalone, or part of the suite.Simulator runs on the varaha-space engine and ships inside Varaha Constellation Designer alongside every other module.
See the platform

varaha.space

Put Simulator to work on your mission

Available self-hosted, hosted, or on-premise — we will match you to the right deployment and walk a scenario end to end.