SolarRadiation.cpp File Reference

Phase H6a — solar position, clear-sky irradiance, cloud. More...

#include "SolarRadiation.hpp"
#include <algorithm>
#include <cmath>
#include "../../../core/DateTime.hpp"
#include "../../../core/SimulationContext.hpp"
#include "../../../data/TableData.hpp"

Include dependency graph for SolarRadiation.cpp:

Namespaces
namespace	openswmm
namespace	openswmm::transport
namespace	openswmm::transport::heat

Functions
SolarPosition	openswmm::transport::heat::solarPosition (int day_of_year, double hour_local, double lat_deg, double lon_deg, double tz_hours) noexcept
	Sun position by the Spencer (1971) / NOAA formulation.
double	openswmm::transport::heat::airMass (double zenith_deg) noexcept
double	openswmm::transport::heat::pressureFromElevation (double elevation_m) noexcept
	Station pressure [mb] from elevation [m], standard atmosphere.
double	openswmm::transport::heat::birdClearSkyGHI (const SolarPosition &pos, double pressure_mb, const SolarConfig &cfg) noexcept
	Bird & Hulstrom clear-sky global horizontal irradiance [W/m²].
double	openswmm::transport::heat::cloudShortwaveFactor (double cloud_fraction, double k, double n) noexcept
	Cloud attenuation of shortwave, 1 − k·C^n (Kasten–Czeplak).
double	openswmm::transport::heat::cloudLongwaveFactor (double cloud_fraction, double k_lw) noexcept
	Cloud enhancement of atmospheric emissivity, 1 + k_lw·C² (Bolz).
void	openswmm::transport::heat::updateSolarForcing (SimulationContext &ctx) noexcept
	Resolve Jin and C for this step into ctx.heat_state.

Detailed Description

Phase H6a — solar position, clear-sky irradiance, cloud.

Author

Caleb Buahin caleb.nosp@m..bua.nosp@m.hin@g.nosp@m.mail.nosp@m..com

Copyright

Copyright (c) 2026 Caleb Buahin. All rights reserved.

License\n Apache-2.0