Enumerations¶

Reference for enumeration types used across the framework.

Aberration¶

Controls light-time and stellar-aberration correction in ephemeris queries.

Value	Description
`None`	No correction
`LT`	Light-time correction
`LTS`	Light-time plus stellar aberration
`CN`	Converged Newtonian light-time
`CNS`	Converged Newtonian light-time plus stellar aberration
`XLT`	Transmission light-time
`XCN`	Transmission converged Newtonian

RelationnalOperator¶

Used in geometry-finder constraint searches.

Value	Description
`Greater`	Greater than threshold
`Less`	Less than threshold
`Equal`	Equal to threshold
`AbsMin`	Absolute minimum
`AbsMax`	Absolute maximum
`LocalMin`	Local minimum
`LocalMax`	Local maximum

OccultationType¶

Value	Description
`Full`	Full occultation
`Partial`	Partial occultation
`Annular`	Annular occultation
`Any`	Any type of occultation

ShapeType¶

Value	Description
`Ellipsoid`	Ellipsoidal body shape
`Point`	Point body shape

OrbitalElementsType¶

Value	Description
`Osculating`	Osculating (instantaneous) elements
`Mean`	Mean elements (e.g., from TLE/OMM)

Warning

Mean elements cannot call ToStateVector() directly. Use TLE.ToOsculating() instead.

EncounterQualityFlags (Pro)¶

Pro

These flags are produced by the SSA workflow in IO.Astrodynamics.SSA.

Value	Description
`None`	Clean conjunction solution
`MissingProtectedCovariance`	Protected object has no covariance
`MissingSecondaryCovariance`	Secondary object has no covariance
`CovarianceUnavailable`	No covariance for either participant
`CovarianceRemediated`	Covariance was remediated
`StaleCovarianceUsed`	Stale covariance was used
`LowRelativeVelocityEncounter`	2D assumption may be degraded
`SingleCovarianceMaximumPcUsed`	Single-covariance maximum Pc was used

CDM Enumerations (Pro)¶

Pro

These enumerations are in the IO.Astrodynamics.CCSDS.CDM namespace.

Enumeration	Values
`CdmObjectRole`	Object 1 / Object 2 roles
`CdmScreenVolumeFrame`	Screening volume reference frame
`CdmScreenVolumeShape`	Screening volume geometry
`CdmReferenceFrame`	CDM state vector reference frame
`CdmCovarianceMethod`	Covariance computation method
`CdmManeuverable`	Maneuverability status

CrossingDirection¶

Used in the event detection system for g-function zero-crossing triggers.

Value	Description
`NegativeToPositive`	g-function crosses zero from negative to positive
`PositiveToNegative`	g-function crosses zero from positive to negative
`Any`	g-function crosses zero in either direction

OrbitalDirection¶

Used with OrbitalDirectionTarget for TRIAD attitude targets.

Value	Description
`Prograde`	Velocity direction (+v)
`Retrograde`	Anti-velocity direction (-v)
`Nadir`	Toward central body center (-r)
`Zenith`	Away from central body center (+r)
`Normal`	Orbital angular momentum (h = r x v)
`AntiNormal`	Anti-orbital angular momentum

InstrumentShape¶

Value	Description
`Circular`	Circular field of view
`Elliptical`	Elliptical field of view
`Rectangular`	Rectangular field of view

IlluminationAngle¶

Value	Description
`Incidence`	Angle between surface normal and illumination direction
`Emission`	Angle between surface normal and observer direction
`Phase`	Angle between illumination and observer directions

Classification (TLE)¶

Value	Description
`Unclassified`	`'U'` — unclassified
`Classified`	`'C'` — classified
`Secret`	`'S'` — secret