SkySim¶

This is the documentation for skysim: a package to simulate the optical spectrum of sky brightness and extinction.

This package implements models described in:

Noll 2012, “An atmospheric radiation model for Cerro Paranal. I. The optical spectral range”, 10.1051/0004-6361/201219040
Leinert 1998, “The 1997 reference of diffuse night sky brightness”, 10.1051/aas:1998105

Links¶

skysim requires python 3.6 or greater, as well as the following packages:

Compute optical airglow emission and transmission.

Refer to Section 4 of Nolll 2012 for details.

`airglow_scattering`(z)	Calculate net Rayleigh and Mie scattering of airglow emission.
`airmass_ag`(z)	Calculate the effective airmass of airglow emission from ~90km.
`get_airglow`(lam, z[, p, H, Rayleigh, Mie, …])	Calculate airglow flux.

Compute scattering and absorption effects on transmission.

Refer to Section 2 of Noll 2012 for details.

`tau0M`(lam[, lam0, k0, alpha])	Calculate zenith optical depth due to Mie scattering off aerosols.
`tau0R`(lam[, p, H])	Calculate zenith optical depth due to Rayleigh scattering.
`tau0ma`(lam)	Calculate zenith optical depth of molecular absorption.
`tau0o3`(lam)	Calculate zenith optical depth of ozone absorption.

Compute optical zodiacal scattering and extinction.

See Section 3.3 of Noll 2012 for details.

`airmass_zodi`(zenith_angle)	Calculate the airmass used for zodiacal light calculations.
`ecl_elong`(ecl_lon, ecl_lat)	Calculate the elongation for a specified ecliptic longitude and latitude.
`get_zodiacal`(lam, ecl_lon, ecl_lat, z[, p, …])	Calculate zodiacal flux.
`get_zodiacal_flux500`(ecl_lon, ecl_lat)	Return zodical flux at 500nm incident above the atmosphere.
`zodiacal_color_factor`(lam, elong)	Calculate the redenning of the solar spectrum.
`zodiacal_scattering`(I0)	Calculate net Rayleigh and Mie scattering of zodiacal light.