EMPYREAN DYNAMICS

User guide

  • About empyrean
    • How it’s built
    • See it in action
    • How the pieces fit together
  • Propagation
    • Inputs and outputs
    • Force-model tiers
    • Uncertainty methods
    • Multi-orbit batch propagation
    • Non-gravitational forces (Yarkovsky / outgassing)
      • Cometary outgassing — model, g(r), and dt
      • Fitting non-grav parameters
    • Events
  • Close approach, B-plane, and impact probability
    • Apophis through 2029
    • Reading the impact-probability table
    • B-plane geometry
    • Method comparison in one query
    • Driving a virtual-asteroid sample with Monte Carlo
    • Cost guidance
  • Orbit determination
    • End-to-end
    • Re-fitting with a prior
    • Evaluating without fitting
    • Stateful sessions
    • Station biases
    • Weighting and catalog debiasing
    • Convergence tolerance
    • Fit acceptability
  • Working with sensitivities
    • Getting a table in the first place
    • Filter to one chain
      • STM convention
    • Propagating a covariance
    • Nonlinearity diagnostic
    • Observation-side partials
  • Data setup
    • What ships via PyPI
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    • Bundled assets
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    • Offline and air-gapped operation
    • Time scales
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    • Network-query caches

Reference

  • Frames, units, and time scales
    • Time scales
    • Reference frames
    • Origins
      • Observer states
    • Units
    • Coordinate representations
  • Glossary
    • Astrodynamics
    • Reference frames and bodies
    • Time scales
    • Observation models
  • Validation
    • What “validated” means here
    • Before you trust a critical number
  • API reference
    • Pipeline entry points
      • empyrean.propagate
      • empyrean.generate_ephemeris
      • empyrean.determine
      • empyrean.evaluate
      • empyrean.refine
      • empyrean.transform_coordinates
      • empyrean.get_states
      • empyrean.get_observer_states
      • empyrean.compute_impact_probabilities
      • empyrean.compute_b_planes
    • I/O helpers
      • empyrean.query_sbdb
      • empyrean.query_horizons
      • empyrean.query_horizons_vectors
      • empyrean.query_observations
      • empyrean.query_radar
      • empyrean.read_ades
      • empyrean.initialize
      • empyrean.download_data
      • empyrean.default_data_dir
      • empyrean.versions
      • empyrean.version_string
    • Coordinates & orbits
      • empyrean.CartesianCoordinates
      • empyrean.KeplerianCoordinates
      • empyrean.CometaryCoordinates
      • empyrean.SphericalCoordinates
      • empyrean.CartesianCovariance
      • empyrean.KeplerianCovariance
      • empyrean.CometaryCovariance
      • empyrean.SphericalCovariance
      • empyrean.CartesianOrbits
      • empyrean.KeplerianOrbits
      • empyrean.CometaryOrbits
      • empyrean.SphericalOrbits
      • empyrean.NonGravParams
      • empyrean.PhotometricParams
      • empyrean.SRPParams
      • empyrean.WideCross
      • empyrean.Epochs
      • empyrean.TimeScale
      • empyrean.Frame
      • empyrean.Origin
      • Continuous thrust
    • Observers
      • empyrean.Observers
    • Propagation
      • empyrean.PropagationConfig
      • empyrean.PropagationResult
      • empyrean.DiagnosticsConfig
      • empyrean.AdvancedIntegratorConfig
      • empyrean.IntegratorChoice
      • empyrean.OriginSwitchingConfig
      • empyrean.EphemerisOverlapPolicy
      • empyrean.ForceModelTier
      • empyrean.UncertaintyMethod
      • empyrean.Auto
      • empyrean.SigmaPoint
      • empyrean.MonteCarlo
      • empyrean.EventConfig
      • empyrean.Events
      • empyrean.EventSummary
      • empyrean.CloseApproachStarts
      • empyrean.CloseApproachEnds
      • empyrean.Periapses
      • empyrean.Impacts
      • empyrean.PossibleImpacts
      • empyrean.AtmosphericEntries
      • empyrean.AtmosphericExits
      • empyrean.CaptureStarts
      • empyrean.CaptureEnds
      • empyrean.ShadowEntries
      • empyrean.ShadowExits
      • empyrean.CovarianceRegimeChanges
      • Tagged covariance
      • System handles
    • Ephemeris
      • empyrean.Ephemeris
      • empyrean.EphemerisConfig
      • empyrean.EphemerisResult
    • Impact probability and B-plane
      • empyrean.ImpactProbabilities
      • empyrean.BPlanes
    • Observation planning
      • empyrean.evaluate_plan
      • empyrean.PlanResult
      • empyrean.PlanMetrics
      • empyrean.PlanCandidates
      • empyrean.PlanEphemeris
      • Planning configuration
    • Math primitives
      • empyrean.eigenvector_max_6x6
      • empyrean.split_gaussian
      • empyrean.MixtureComponent
    • Sensitivity
      • empyrean.StateSensitivities
      • empyrean.ObservationSensitivities
      • empyrean.SENSITIVITY_ROW_RANGE
      • empyrean.SENSITIVITY_ROW_RA
      • empyrean.SENSITIVITY_ROW_DEC
      • empyrean.SENSITIVITY_ROW_VRANGE
      • empyrean.SENSITIVITY_ROW_VRA
      • empyrean.SENSITIVITY_ROW_VDEC
    • Orbit determination
      • empyrean.ADESObservations
      • empyrean.ADESRadarObservations
      • empyrean.ODConfig
      • empyrean.DetermineResult
      • empyrean.DetermineResults
      • empyrean.DetermineFailure
      • empyrean.EvaluateResult
      • empyrean.ObservationResults
      • empyrean.ResidualSummary
      • empyrean.FitSummary
      • empyrean.BandStat
      • empyrean.AcceptabilityReport
      • empyrean.GateRecord
      • empyrean.SolvedCovariance
      • empyrean.StallDelivery
      • empyrean.CovarianceTrust
      • empyrean.TrustGateEvent
      • empyrean.StationBiases
      • empyrean.OutputEpoch
      • empyrean.OutputEpochMode
      • empyrean.Session
      • empyrean.SessionDiff
      • Post-OD photometry
      • OD configuration
v0.10.0
empyrean › API reference › empyrean.SteeringLaw
Index

empyrean.SteeringLaw¶

SteeringLaw = empyrean.orbits.thrust.ConstantRTN | empyrean.orbits.thrust.VelocityTangent | empyrean.orbits.thrust.InertialFixed¶

Represent a PEP 604 union type

E.g. for int | str

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