Name
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Description
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ApplyUT1Correction
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Flag controlling UT1-UTC time correction. Value should be set to 0 or 1. Value of 1 will apply the correction from the timing corrections file (UT1UTC.dat) when computing UTC. Value of 0 corresponds to no corrections applied resulting in UT1=UTC.
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ComputePolarMotion
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Flag controlling computation of earth's polar motion. Value should be set to 0 or 1. Value of 1 causes polar motion effects to be calculated and added to earth's attitude. Value of 0 causes polar motion effects to be ignored.
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COUpdateInterval
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Update method applied when reading Celestial Object position and velocity information from the planetary forces file (e.g., DE430).
A value of zero will cause the position and velocity to be updated to the full accuracy supplied. This is the instantaneous mode. This mode is recommended.
A positive value will cause the position and velocity to be updated to the nearest specified seconds. This is the quantitized mode. This mode may introduce discontinuities in the Celestial Object modeling and is not recommended.
A negative value will cause the position and velocity to be updated when the requested reading deviates by more that the absolute value in seconds from the previous update. This is the hysteresis mode. This mode may introduce discontinuities in the Celestial Object modeling and is not recommended.
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DeclaredName
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The name of the object as declared.
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DefaultAtmosphereModelFile
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File name for earth's Atmosphereric Model data.
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DefaultDaylightSavingsTimeFile
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File name that provides formulaic values so that FreeFlyer can internally calculate the DST epochs for a given year.
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DefaultDEXXXFile
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File name for Planetary model data.
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DefaultElectronDensityFile
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File name for earth's Atmospheric Electron Density model data.
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DefaultGeopotentialFile
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File name for earth's Geopotential model data.
This property can be overridden for individual Spacecraft using the ForceModel.PlanetoPotentialFilename string array.
The potential file used for each celestial body contains values for the physical properties of the body (Gravity Constant (mu), Body Radius, Reciprocal Flattening). These values are used when propagating the Spacecraft any time a potential file is used. For other calculations that depend on the physical properties of a celestial body, such as Spacecraft.Height or propagation of a Spacecraft with a point mass gravitational model, the celestial body physical properties are accessed using syntax such as "Earth.Mu".
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DefaultHPDragFile
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File name for Harris-Priester drag model data.
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DefaultMagneticFieldFile
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File name for earth's Magnetic model data.
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DefaultSGFFile
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File name for the station geodetics data.
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DefaultSolidTideModelFile
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File name for earth's Solid Tide model data.
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DefaultStarFieldFile
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File name for the star data.
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DefaultUTCTAIConversionFile
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File name for TAI to UTC conversion data.
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DefaultUTCUT1ConversionFile
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File name for UT1 correction data.
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IonosphereOptions
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The object that controls the Ionosphere is modeled.
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Name
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The name displayed for this object in output windows such as views, plots, and reports.
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NoradKeplerEqTolerance
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Controls the tolerance used in solving Kepler's equation in the Norad propagator. 1e-12 is the value suggested in Spacetrack Report #6, and 1e-6 is the value suggested in Spacetrack Report #3.
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NPUpdateInterval
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Update method applied when reading earth's nutation and precession information from the planetary forces file (e.g., DE430).
A positive value will cause the nutation and precession to be updated to the nearest specified seconds. This is the quantitized mode.
A value of zero will cause the nutation and precession to be updated to the full accuracy supplied. This is the instantaneous mode.
A negative value will cause the nutation and precession to be updated when the requested reading deviates by more that the absolute value in seconds from the previous update. This is the hysteresis mode.
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ObjectId
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The unique identifier for the object.
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ObjectType
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The type of the object.
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