ASCOM.Astrometry Namespace

Summary

This namespace contains all ASCOM astrometry components together with associated enums and structures. The astrometry components (Transform, NOVAS-COM and Kepler) are located in the ASCOM.Astrometry.Components namespace while unified enums and structures are in the ASCOM.Astrometry namespace and serve all three components.

Transform is a new component while those familiar with the Kepler and NOVAS-COM components will recognise find all of their functionality in this namespace. Further information is given in the "Which NOVAS" topic at the head of this help file.

Classes

  ClassDescription
Public classDeltaT
Static class containing one member to return the value of Delta T for a given Julian date.

Structures

  StructureDescription
Public structureBodyDescription
Structure to hold body type, number and name
Public structureCatEntry
Structure to hold astrometric catalogue data
Public structureCatEntry3
Catalogue entry structure
Public structureFundamentalArgs
Structure to hold Sun and Moon fundamental arguments
Public structureInSpace
Observer’s position and velocity in a near-Earth spacecraft.
Public structureObject3
Celestial object structure
Public structureObserver
General specification for the observer's location
Public structureOnSurface
Parameters of observer's location
Public structurePosVector
Structure to hold a position vector
Public structureRAOfCio
Right ascension of the Celestial Intermediate Origin (CIO) with respect to the GCRS.
Public structureSiteInfo
Structure to hold site information
Public structureSkyPos
Celestial object's place in the sky
Public structureVelVector
Structure to hold a velocity vector

Enumerations

  EnumerationDescription
Public enumerationAccuracy
Calculation accuracy
Public enumerationBody
Body number starting with Mercury = 1
Public enumerationBodyType
Type of body, Major Planet, Moon, Sun or Minor Planet
Public enumerationCoordSys
Coordinate system of the output position
Public enumerationEarthDeflection
Location of observer, determining whether the gravitational deflection due to the earth itself is applied.
Public enumerationEquinoxType
Type of equinox
Public enumerationEventType
Type of event for which an ephemeris is required
Public enumerationFrameConversionDirection
Direction of frame conversion
Public enumerationGstType
Type of sidereal time
Public enumerationMethod
Computation method
Public enumerationNutationDirection
Direction of nutation correction
Public enumerationObjectType
Type of object
Public enumerationObserverLocation
Location of observer
Public enumerationOrigin
Co-ordinate origin: centre of Sun or solar system barycentre
Public enumerationOutputVectorOption
Output vector reference system
Public enumerationPoleOffsetCorrection
Type of pole ofset
Public enumerationReferenceSystem
Reference system in which right ascension is given
Public enumerationRefractionOption
Type of refraction correction
Public enumerationTarget
Body or location
Public enumerationTransformationDirection
Direction of transformation: ITRS to Terrestrial Intermediate or vice versa
Public enumerationTransformationOption
Type of transformation: Epoch, Equator and Equinox or all three
Public enumerationTransformationOption3
Type of transformation