Antenna Frequency Drift Error Model

SWITCH TO MANUAL

Class in Zendir.Classes | Inherits from UniverseModel

Declaration

class AntennaFrequencyDriftErrorModel;

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Description

The Antenna Frequency Drift Error Model simulates realistic frequency instabilities in antenna oscillators over time. Frequency drift is a critical consideration in communication systems, particularly for spacecraft where environmental conditions and component aging can significantly impact signal accuracy. This model accounts for multiple physical phenomena that contribute to frequency deviation, including temperature variations, component aging, random walk processes, and linear drift from power supply degradation.

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Properties

Declared	Description
AgingRate	The aging rate (dimensionless). Represents the relative frequency changedue to aging. Typical values: 1e-9 to 5e-9 per day for quality oscillators.
AgingTimeConstant	The aging time constant in seconds. Controls how quickly aging effectssaturate. Typical values: 86400 (1 day) to 2592000 (30 days).
DriftRate	The constant drift rate in Hz/s. This represents a linear frequencychange over time, such as from power supply aging.
EnableAgingDrift	Whether to enable aging-related frequency drift.
EnableRandomWalk	Whether to enable random walk (stochastic) frequency drift.
EnableTemperatureDrift	Whether to enable temperature-dependent frequency drift.
MaxRandomWalkDeviation	The maximum random walk deviation in Hz. Prevents unrealisticaccumulation of random drift.
MaxRelativeDeviation	The maximum relative frequency deviation allowed (dimensionless).Default is 100 ppm (100e-6). This prevents physically unrealisticfrequency changes.
QuadraticTemperatureCoefficient	The quadratic temperature coefficient in 1/K² for more accurate modeling.Typical values: -0.04e-6 for AT-cut crystals.
RandomWalkRate	The random walk rate in Hz/√s. This is the standard deviation of therandom walk step per square root of time. Typical values depend onoscillator quality: 0.001 to 0.1 Hz/√s.
ReferenceTemperature	The reference temperature in Kelvin at which the oscillator is calibrated.Default is 298.15 K (25°C).
TemperatureCoefficient	The linear temperature coefficient in 1/K (relative frequency change per Kelvin).Typical values: 0.1e-6 to 1.0e-6 (0.1 to 1.0 ppm/°C) for crystal oscillators.

Inherited	Description
IsEnabled	Is true if the object is currently enabled.
Name	The display name or tag of this object.
Parent	The currently attached parent object.

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Methods

Declared	Description
SetRandomSeed	Sets the random seed for the internal random number generator.

Inherited	Description
FindParentWithID	Returns an attached parent that satisfies the specified ID.
FindParentWithType	Returns an attached parent that satisfies the specified type.
FindRootWithID	Returns a root object that satisfies the specified ID.
FindRootWithType	Returns a root object that satisfies the specified type.