Enum AtmDensity 

pub enum AtmDensity {
    Constant(f64),
    Exponential {
        rho0_kg_m3: f64,
        ref_alt_km: f64,
        scale_height_km: f64,
    },
    StdAtm {
        max_alt_km: f64,
    },
    NRLMSISE00 {
        weather: SpaceWeatherData,
    },
    HarrisPriester {
        n_parameter: usize,
    },
}

Density in kg/m^3 and altitudes in kilometers

Variants

Constant(f64)

Homogeneous, static atmospheric mass density ($\text{kg/m}^3$).

Ignores altitude, spatial position, and temporal variations. Useful for analytical baseline tests, sanity-checking drag accelerations, or short propagation steps.

Exponential

Barometric scale-height density model.

Evaluates atmospheric density using a single-layer exponential decay: $$\rho(h) = \rho_0 \exp\left(-\frac{h - h_0}{H}\right)$$ where $h$ is geodetic altitude ($\text{m}$), $h_0$ (ref_alt_m) is the reference altitude, $\rho_0$ (rho0) is reference density ($\text{kg/m}^3$), and $H$ (scale_height_m) is the density scale height.

Limitations: Ignores solar/geomagnetic activity and diurnal variations. Accuracy degrades rapidly outside a narrow altitude band around $h_0$.

Fields

rho0_kg_m3: f64

Reference atmospheric density $\rho_0$ at altitude $h_0$ [kg/m³].

ref_alt_km: f64

Reference geodetic altitude $h_0$ [km].

scale_height_km: f64

Atmospheric scale height $H = \frac{R T}{M g}$ [km].

StdAtm

U.S. Standard Atmosphere 1976 (USSA76) empirical density model.

Evaluates piecewise atmospheric temperature and pressure profiles up to $1,000\text{ km}$ ($10^6\text{ m}$). Assumes hydrostatic equilibrium and perfect gas behavior across defined atmospheric layers.

Limitations: Static global average model. Does not capture solar EUV heating cycles, geomagnetic storm surges, or diurnal day/night atmospheric expansion.

Fields

max_alt_km: f64

Maximum operational altitude [km]. Above this threshold, density returns 0.0 kg/m³.

NRLMSISE00

NRLMSISE-00 empirical atmosphere model.

Computes neutral atmospheric density and composition from 0 to ~1000 km altitude as a function of location, time, solar activity (F10.7), and geomagnetic activity (Ap).

Fields

weather: SpaceWeatherData

HarrisPriester

Harris-Priester atmospheric density model.

Computes density accounting for diurnal atmospheric expansion using tabular min/max density profiles interpolated exponentially across altitude bands, modified by the diurnal bulge angle offset.

Fields

n_parameter: usize

Diurnal bulge parameter $n$ (typically 2 for low inclination, 6 for polar).

Trait Implementations

impl Clone for AtmDensity

fn clone(&self) -> AtmDensity

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AtmDensity

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AtmDensity

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a, 'py> FromPyObject<'a, 'py> for AtmDensity

where Self: Clone,

type Error = PyClassGuardError<'a, 'py>

The type returned in the event of a conversion error.

fn extract( obj: Borrowed<'a, 'py, PyAny>, ) -> Result<Self, <Self as FromPyObject<'a, 'py>>::Error>

Extracts Self from the bound smart pointer obj.

impl<'py> IntoPyObject<'py> for AtmDensity

type Target = AtmDensity

The Python output type

type Output = Bound<'py, <AtmDensity as IntoPyObject<'py>>::Target>

The smart pointer type to use.

type Error = PyErr

The type returned in the event of a conversion error.

fn into_pyobject( self, py: Python<'py>, ) -> Result<<Self as IntoPyObject<'_>>::Output, <Self as IntoPyObject<'_>>::Error>

Performs the conversion.

impl PyClass for AtmDensity

const NAME: &str = "AtmDensity"

Name of the class.

type Frozen = True

Whether the pyclass is frozen.

impl PyClassBaseType for AtmDensity

type LayoutAsBase = <AtmDensity as PyClassImpl>::Layout

type BaseNativeType = <AtmDensity as PyClassImpl>::BaseNativeType

type Initializer = PyClassInitializer<AtmDensity>

type PyClassMutability = <AtmDensity as PyClassImpl>::PyClassMutability

type Layout<T: PyClassImpl> = <<AtmDensity as PyClassBaseType>::BaseNativeType as PyClassBaseType>::Layout<T>

The type of object layout to use for ancestors or descendants of this type.

impl PyClassImpl for AtmDensity

const MODULE: Option<&str> = ::core::option::Option::None

Module which the class will be associated with.

const IS_BASETYPE: bool = true

#[pyclass(subclass)]

const IS_SUBCLASS: bool = false

#[pyclass(extends=…)]

const IS_MAPPING: bool = false

#[pyclass(mapping)]

const IS_SEQUENCE: bool = false

#[pyclass(sequence)]

const IS_IMMUTABLE_TYPE: bool = false

#[pyclass(immutable_type)]

const RAW_DOC: &'static CStr = /// Density in kg/m^3 and altitudes in kilometers

Docstring for the class provided on the struct or enum.

const DOC: &'static CStr

Fully rendered class doc, including the text_signature if a constructor is defined.

type Layout = <<AtmDensity as PyClassImpl>::BaseNativeType as PyClassBaseType>::Layout<AtmDensity>

Description of how this class is laid out in memory

type BaseType = PyAny

Base class

type ThreadChecker = NoopThreadChecker

This handles following two situations:

type Inventory = Pyo3MethodsInventoryForAtmDensity

type PyClassMutability = <<PyAny as PyClassBaseType>::PyClassMutability as PyClassMutability>::ImmutableChild

Immutable or mutable

type Dict = PyClassDummySlot

Specify this class has #[pyclass(dict)] or not.

type WeakRef = PyClassDummySlot

Specify this class has #[pyclass(weakref)] or not.

type BaseNativeType = PyAny

The closest native ancestor. This is PyAny by default, and when you declare #[pyclass(extends=PyDict)], it’s PyDict.

fn items_iter() -> PyClassItemsIter

fn lazy_type_object() -> &'static LazyTypeObject<Self>

fn dict_offset() -> Option<PyObjectOffset>

Used to provide the dictoffset slot (equivalent to tp_dictoffset)

fn weaklist_offset() -> Option<PyObjectOffset>

Used to provide the weaklistoffset slot (equivalent to tp_weaklistoffset

impl PyTypeInfo for AtmDensity

const NAME: &str = <Self as ::pyo3::PyClass>::NAME

👎Deprecated since 0.28.0:

prefer using ::type_object(py).name() to get the correct runtime value

Class name.

const MODULE: Option<&str> = <Self as ::pyo3::impl_::pyclass::PyClassImpl>::MODULE

👎Deprecated since 0.28.0:

prefer using ::type_object(py).module() to get the correct runtime value

Module name, if any.

fn type_object_raw(py: Python<'_>) -> *mut PyTypeObject

Returns the PyTypeObject instance for this type.

fn type_object(py: Python<'_>) -> Bound<'_, PyType>

Returns the safe abstraction over the type object.

fn is_type_of(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type or a subclass of this type.

fn is_exact_type_of(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type.

impl Serialize for AtmDensity

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StaticType for AtmDensity

where f64: StaticType, SpaceWeatherData: StaticType, usize: StaticType,

fn static_type() -> SimpleType

Return the Dhall type that represents this type.