Propagators

Propagator modules advance spacecraft state from TLE, OMM, ephemeris, or fitted initial conditions over a requested time span. OrbPro2 can use these outputs directly for paths, clocks, RIC-relative displays, and downstream analysis.

What it can do

Run fast catalog propagation with SGP4, high-fidelity force modeling with HPOP, or specialized dynamics such as cislunar propagation while keeping frames, units, time systems, and interpolation metadata explicit.

Reference modules

space-data-network-modules/propagator/sgp4
space-data-network-modules/propagator/hpop
space-data-network-modules/propagator/cislunar

Contract shape

Inputs describe orbit state, epoch, propagation span, step policy, and force configuration. Outputs are time-ordered states, interpolation hints, warnings, and explicit failure records.

Authoring checklist

Declare one-shot propagation and optional stream methods in the SDK manifest.
Use SDS records for orbit inputs and propagated state outputs.
Validate against public SGP4, HPOP, CR3BP, or closed-form orbital cases.
Test the same dist/isomorphic/module.wasm in browser and WasmEdge.