Description
The Constants object type has a number of static properties and methods on it to make it easier to access standard mathematical and physical constants used in space-based mission design. This object is not creatable in script.
Users cannot create instances of this type of object. However, users can access instances of this object type that have been created indirectly, for example as children of other objects. Users can also access any static properties and methods on this object type.
Inheritance Hierarchy: Object->Constants
Available In Editions:
Engineer
Mission
Timing Precision Mode
This page describes functionality in millisecond timing precision mode. Millisecond timing precision mode is deprecated and will be removed in a future release. We recommend that you migrate your Mission Plans to nanosecond timing precision mode.
Click here to see the documentation for this object in nanosecond timing precision mode.
Name
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Description
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Attributes
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DeclaredName
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The name of the object as declared.
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Type: String
Access: Read-Only
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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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Type: String
Access: Read/Write
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ObjectId
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The unique identifier for the object.
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Type: Variable
Access: Read-Only
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ObjectType
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The type of the object.
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Type: String
Access: Read-Only
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Name
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Description
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ClearSavedStates
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Clears previous saved states for this object.
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GetFromFile
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Load the object state from the specified FreeFlyer object file.
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GetFromString
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Load the object state from the specified string.
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PutToFile
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Convert the object state to FreeFlyer object xml and write to a file.
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PutToString
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Convert the object state to FreeFlyer object xml and return as a string.
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ReferenceEquals
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Returns 1 if the argument refers to the calling object and 0 otherwise.
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Restore
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Restore an object's state from a previously saved state.
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Save
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Save the object's state so that it can be restored later.
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Name
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Description
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Attributes
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AU
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Astronomical unit.
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Type: Variable
Access: Read-Only
Units: km
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Boltzmann
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Boltzmann constant.
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Type: Variable
Access: Read-Only
Units: km^2 kg/(s^2 Deg K)
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c
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Speed of light.
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Type: Variable
Access: Read-Only
Units: km/s
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e
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Euler's number.
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Type: Variable
Access: Read-Only
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G
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Universal gravitational constant.
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Type: Variable
Access: Read-Only
Units: km^3/(kg s^2)
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GoldenRatio
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Golden ratio.
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Type: Variable
Access: Read-Only
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GravitationalConstant
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Universal gravitational constant.
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Type: Variable
Access: Read-Only
Units: km^3/(kg s^2)
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h
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Planck constant.
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Type: Variable
Access: Read-Only
Units: km^2 kg/s
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k
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Boltzmann constant.
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Type: Variable
Access: Read-Only
Units: km^2 kg/(s^2 Deg K)
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Pi
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Mathematical constant.
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Type: Variable
Access: Read-Only
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Planck
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Planck constant.
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Type: Variable
Access: Read-Only
Units: km^2 kg/s
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SolarConstant
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The Solar Constant, also known as Mean Solar Flux, is the mean Total Solar Irradiance (TSI) at one AU (astronomical unit). Sometimes denoted as 'S' or 'Gsc', this parameter is used in Solar Radiation Pressure (SRP) force modeling.
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Type: Variable
Access: Read-Only
Units: W/m^2
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SpeedOfLight
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Speed of light.
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Type: Variable
Access: Read-Only
Units: km/s
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StefanBoltzmann
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Stefan-Boltzmann constant.
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Type: Variable
Access: Read-Only
Units: W/(km^2 Deg K^4)
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Name
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Description
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SetAU
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Overrides the constant Astronomical Unit value.
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SetSolarConstant
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Overrides the constant Solar Constant value.
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See also
Mathematical and Physical Constants Guide
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