farms.utilities

Common utilities FARMS module.

Functions

calc_beta(aod, alpha)	Calculate the Angstrom turbidity coeff.
calc_dhi(dni, ghi, sza)	Calculate the diffuse horizontal irradiance and correct the direct.
check_range(data, name[, rang])	Ensure that data values are in correct range.
cloud_variability(irrad, cs_irrad, cloud_type)	Add syntehtic variability to irradiance when it's cloudy.
dark_night(irrad_data, sza[, lim])	Enforce zero irradiance when solar angle >= threshold.
linear_variability(csr, var_frac)	Return an array with a linear relation between clearsky ratio and maximum variability fraction.
merge_rest_farms(clearsky_irrad, ...)	Combine clearsky and rest data into all-sky irradiance array.
normal_variability(csr, cloud_type, var_frac)	Get an array with a normal distribution of variability scalars centered at 1 that can be multiplied by a irradiance array with the same shape as csr.
rayleigh(dhi, cs_dhi, fill_flag[, rayleigh_flag])	Perform Rayleigh violation check (all-sky diffuse >= clearsky diffuse).
screen_cld(cld_data[, rng])	Enforce a numeric range on cloud property data.
screen_sza(sza[, lim])	Enforce an upper limit on the solar zenith angle.
ti_to_radius(time_index[, n_cols])	Calculates Earth-Sun Radius Vector.
ti_to_radius_csv(time_index[, n_cols])	Convert a time index to radius.
tri_variability(csr, var_frac[, tri_center])	Return an array with a triangular distribution between clearsky ratio and maximum variability fraction.
uniform_variability(csr, cloud_type, var_frac)	Get an array with uniform variability scalars centered at 1 that can be multiplied by a irradiance array with the same shape as csr.