Model Geometry

sasktran2.Geometry1D(cos_sza, solar_azimuth, ...)	A geometry object that depends only on altitude.
sasktran2.Geometry2D(cos_sza, solar_azimuth, ...)	A structured spherical geometry varying in altitude and one angle.

Geometry2D capabilities

The current sasktran2.Engine integration for sasktran2.Geometry2D supports occultation and transmission, exact single scattering, standard emission, and volume-emission-rate sources. Altitude-only constituents remain compatible and are applied across the horizontal grid, while the native 2D constituents can specify horizontally varying volume properties. Existing surface constituents may be used, but the surface itself is spatially uniform.

Multiple scattering, flux observers, line-of-sight refraction, and horizontally varying surfaces are not yet supported with sasktran2.Geometry2D.

Geometry2D engine calculations use the Rust-backed 2D ray tracer and therefore require Rust component support. The SKTRAN_USE_RUST_RAYTRACER CMake option selects the Rust-backed ray tracer only for Geometry1D; disabling it does not disable the Geometry2D ray tracer.