Download Prague Sky Model Coefficient Data — download_sky

This model which allows for sun angles below the horizon, wide spectral ranges including infrared, polarization, as well rendering at altitude) need to download a coefficient file. There are three versions of this dataset, listed here in order of increasing size:

Usage

download_sky_data(sea_level = TRUE, wide_spectrum = FALSE)

Arguments

sea_level: Default TRUE. Download the sea‑level–only data. Set to FALSE to download the full‑altitude dataset.
wide_spectrum: Default FALSE. If TRUE, downloads the wide‑spectrum (55‑channel, polarised) version. Valid only when sea_level = TRUE.

Value

Invisibly, the full path to the data file.

Details

Argument combination	File	Size
`sea_level = TRUE, wide_spectrum = FALSE`	`SkyModelDatasetGround.dat`	107MB
`sea_level = TRUE, wide_spectrum = TRUE`	`PragueSkyModelDatasetGroundInfra.dat`	574MB
`sea_level = FALSE`	`SkyModelDataset.dat`	2.4GB

Examples

if (FALSE) { # \dontrun{
  # Standard (11‑channel, sea‑level) coefficients
  download_sky_data()

  # Wide‑spectrum sea‑level coefficients
  download_sky_data(wide_spectrum = TRUE)

  # Full altitude‑range coefficients
  download_sky_data(sea_level = FALSE)
} # }