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SRAD sky view factor modelled using the 1" DEM-S

Created 25/06/2025

Updated 25/06/2025

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Mean monthly solar radiation was modelled across Australia using topography from the 1 arcsecond resolution SRTM-derived DEM-S and climatic and land surface data. The SRAD model (Wilson and Gallant, 2000) was used to derive: • Incoming short-wave radiation on a sloping surface • Short-wave radiation ratio (shortwave on sloping surface / shortwave on horizontal surface) • Incoming long-wave radiation • Outgoing long-wave radiation • Net long-wave radiation • Net radiation • Sky view factor All radiation values are in MJ/m2/day except for short-wave radiation ratio which has no units. The sky view factor is the fraction of the sky visible from a grid cell relative to a horizontal plane. The radiation values are determined for the middle day of each month (14th or 15th) using long-term average atmospheric conditions (such as cloudiness and atmospheric transmittance) and surface conditions (albedo and vegetation cover). They include the effect of terrain slope, aspect and shadowing (for sun positions at 5 minute intervals from sunrise to sunset), direct and diffuse radiation and sky view. The 3 arcsecond resolution versions of these radiation surfaces have been produced from the 1 arcsecond resolution surfaces, by aggregating the cells in a 3x3 window and taking the mean value. The data in this collection are available at 1 arcsecond resolution as 1x1 degree tiles (ESRI grid format) or as a single grid mosaic of Australia (TIFF format), and at 3 arcsecond resolution as a single grid of Australia (TIFF format).

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Additional Info

Field Value
Title SRAD sky view factor modelled using the 1" DEM-S
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/ca45107e-60b5-446e-8299-b7c5c7b9a514
Contact Point
Terrestrial Ecosystem Research Network's Data Discovery
esupport@tern.org.au
Reference Period 11/02/2000 - 22/02/2000
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        113.0,
        -44.0
      ],
      [
        154.0,
        -44.0
      ],
      [
        154.0,
        -10.0
      ],
      [
        113.0,
        -10.0
      ],
      [
        113.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Terrestrial Ecosystem Research Network

Data Source

This dataset was originally found on Terrestrial Ecosystem Research Network "SRAD sky view factor modelled using the 1" DEM-S". Please visit the source to access the original metadata of the dataset:
https://geonetwork.tern.org.au/geonetwork/srv/eng/csw/dataset/srad-sky-view-factor-modelled-using-the-1quot-dem-s