SolarModel

For: users supplying solar spectra or checking the package default solar transmission table.

Next: Configure a Scene, Vector RTE & Discretization (Concepts), Library.

The SolarModel module provides Planck-spectrum helpers and solar transmission readers used by vSmartMOM examples and RT configurations. It is intentionally small: it loads or generates spectral inputs, while the CoreRT solver applies those inputs through the solar source-function path.

Spectrum Helpers

Function	Grid	Output
planck_spectrum_wn	wavenumber in cm^-1	black-body radiance in mW m^-2 sr^-1 cm
planck_spectrum_wl	wavelength in micrometers	black-body radiance in W m^-2 sr^-1 um^-1
default_solar_spectrum_at_earth	wavenumber in cm^-1	approximate photon spectrum multiplied by the default solar transmission

The default solar spectrum helper is available as vSmartMOM.SolarModel.default_solar_spectrum_at_earth.

Solar Transmission Tables

Use solar_transmission_from_file when you have an explicit two-column table:

using vSmartMOM

nu_grid = 12900.0:0.02:13100.0
solar = vSmartMOM.SolarModel.solar_transmission_from_file("solar.out", nu_grid)

Use default_solar_transmission when you want the package default table:

solar = vSmartMOM.SolarModel.default_solar_transmission(12900.0:0.02:13100.0)

Default Data Resolution

default_solar_transmission_path resolves the default table in this order:

1. ENV["VSMARTMOM_SOLAR_FILE"], when set;

2. the registered Julia solar artifact, when available;

3. a checksum-verified scratch-space cache downloaded from the legacy vSmartMOM host.

The fallback cache is relocatable and does not write into the package source tree.

Useful APIs

• planck_spectrum_wn, planck_spectrum_wl

• solar_transmission_from_file

• default_solar_transmission_path, default_solar_transmission

• vSmartMOM.SolarModel.default_solar_spectrum_at_earth