User guide

This guide explains how to drive the solver: how to build a configuration, which knobs control which physics, and how to read the results. It is written against the C++ and single-wavenumber JAX APIs, which share the same field names (in snake_case for JAX and camelCase helpers in C++). The batched CUDA and JAX interfaces are covered in Backends & API reference.

• Configuration
  • Dimensions and flags
  • Boundary and source parameters
  • Layer and level arrays
  • Validation rules
  • The RTOutput object
• Outputs
  • Always populated
  • Optional: net-flux components
  • Optional: temperature Jacobians
• Thermal emission
  • Basic setup
  • Boundary temperatures
  • Supplying Planck values directly
• Solar / stellar beam
  • Direct beam and fluxes
  • Combined thermal + solar
  • Mean intensity and the beam
• Phase functions
  • Built-in helpers
  • Arbitrary phase functions
• Boundary conditions
  • Upper boundary
  • Lower boundary: Lambertian surface
  • Lower boundary: diffusion approximation
• Using delta-M scaling
  • When to use it
  • Consistency of derived quantities
• Temperature Jacobians
  • Enabling
  • Reading the Jacobians
  • Practical notes