sasktran2.Geometry1D

sasktran2.Geometry1D#

class sasktran2.Geometry1D(self: sasktran2._core.Geometry1D, cos_sza: float, solar_azimuth: float, earth_radius_m: float, altitude_grid_m: numpy.ndarray[numpy.float64[m, 1]], interpolation_method: sasktran2._core.InterpolationMethod, geometry_type: sasktran2._core.GeometryType)#

Bases: pybind11_object

Initializes a geometry where the atmosphere varies only in 1 dimension (altitude). The reference point is defined by solar angles at the reference point.

Parameters:

  • cos_sza (float) – Cosine of solar zenith angle at the reference point

  • solar_azimuth (float) – Solar azimuth angle at the reference point.

  • earth_radius_m (float) – Radius of the earth. Only has an effect if geometry_type is not set to PlaneParallel

  • altitude_grid_m (np.array) – One dimensional altitude grid

  • interpolation_method (sasktran2.InterpolationMethod) –

    The interpolation method to use in-between geometry grid points

    sasktran2.InterpolationMethod.LinearInterpolation

    In-between grid points, linear interpolation is assumed. This means that Atmospheric quantities such as extinction, single scatter albedo, should be thought of as sampled on the geometry grid points.

    sasktran2.InterpolationMethod.ShellInterpolation

    Atmospheric quantities such as extinction, single scatter albedo, are assumed to be constant in-between geometry grid points.

  • geometry_type (sasktran2.GeometryType) –

    The global geometry type used inside the radiative transfer calculation.

    sasktran2.GeometryType.Spherical

    All aspects of the calculation are done using spherical geometry.

    sasktran2.GeometryType.PlaneParallel

    All aspects of the calculation are done using plane-parallel geometry.

    sasktran2.GeometryType.PseudoSpherical

    Line of sight integration and the multiple scatter calculation is done using plane parallel geometry, however the initial solar source function is calculated using a spherical geometry.

__init__(self: sasktran2._core.Geometry1D, cos_sza: float, solar_azimuth: float, earth_radius_m: float, altitude_grid_m: numpy.ndarray[numpy.float64[m, 1]], interpolation_method: sasktran2._core.InterpolationMethod, geometry_type: sasktran2._core.GeometryType) → None#

Initializes a geometry where the atmosphere varies only in 1 dimension (altitude). The reference point is defined by solar angles at the reference point.

Parameters:

  • cos_sza (float) – Cosine of solar zenith angle at the reference point

  • solar_azimuth (float) – Solar azimuth angle at the reference point.

  • earth_radius_m (float) – Radius of the earth. Only has an effect if geometry_type is not set to PlaneParallel

  • altitude_grid_m (np.array) – One dimensional altitude grid

  • interpolation_method (sasktran2.InterpolationMethod) –

    The interpolation method to use in-between geometry grid points

    sasktran2.InterpolationMethod.LinearInterpolation

    In-between grid points, linear interpolation is assumed. This means that Atmospheric quantities such as extinction, single scatter albedo, should be thought of as sampled on the geometry grid points.

    sasktran2.InterpolationMethod.ShellInterpolation

    Atmospheric quantities such as extinction, single scatter albedo, are assumed to be constant in-between geometry grid points.

  • geometry_type (sasktran2.GeometryType) –

    The global geometry type used inside the radiative transfer calculation.

    sasktran2.GeometryType.Spherical

    All aspects of the calculation are done using spherical geometry.

    sasktran2.GeometryType.PlaneParallel

    All aspects of the calculation are done using plane-parallel geometry.

    sasktran2.GeometryType.PseudoSpherical

    Line of sight integration and the multiple scatter calculation is done using plane parallel geometry, however the initial solar source function is calculated using a spherical geometry.

Methods

__init__(self, cos_sza, solar_azimuth, ...)

Initializes a geometry where the atmosphere varies only in 1 dimension (altitude).

altitudes(self)

Attributes

refractive_index

The refractive index of the atmosphere.
altitudes(self: sasktran2._core.Geometry1D) → numpy.ndarray[numpy.float64[m, 1]]#
property refractive_index#

The refractive index of the atmosphere. This is used to calculate refraction in the radiative transfer calculation. Defaults to 1.0 which indicates no refractive effects. Only has an effect if the refraction configuration options are enabled in the sasktran2.Config object.