Technical Specs

Lagrangian Particle Tracking Air Dispersion Model


This product is a Microsoft Windows-based program that can be installed in the following Windows operating systems:

  • 32-bit and 64-bit Operating Systems
  • Windows 10

Minimum requirements:

  • An Intel Pentium 4 processor (or equivalent) or higher
  • At least 2 GB of available hard disk space
  • 1 GB of RAM (2 GB recommended)


AUSTAL View is an interface for the AUSTAL model. See below the technical specifications for this model:

Model NameAUSTAL
Developed ByGerman Federal Environmental Agency (UBA)
Model TypeLagrangian particle tracking air dispersion model
Range100 times the source height. For example, for a stack height of 250 m a range of up to 25 km in radius is realistic.
Source TypesPoint, area, volume, line, cooling tower
Pollutants and EmissionsMulti-pollutants can be model in a single run Emissions can be specified as constant or time-dependent
MeteorologyHourly meteorological data in AKT, AKTerm, and AKS formats are accepted by the model. The AKT, AKTerm format contain the hourly data for wind direction, wind speed, and stability class according to Klug/Manier. The AKS file contains the statistics of wind direction, wind velocity and dispersion class.
Note: To support users without access to the above met file formats, AUSTAL View accepts a CSV file with the following hourly met data parameters: wind direction (deg), wind speed (m/s), and Monin-Obukhov Length (m).
TerrainFlat or Elevated. The model accepts terrain data in GridASCII format. Note: AUSTAL View accepts the following terrain data formats: GridASCII, XYZ, USGS DEM, and SRTM.
ReceptorsSingle or nested grid, monitor points
Other OptionsSeveral additional model options are available, such as:
  • Wind field around buildings and terrain
  • Conversion of NO to NO2 (according to guideline VDI 3782 Part 1
  • Variable source parameters (temperature, thermal flow, discharge velocity, and time scale
Output TypeThe output type depends on the pollutant being modeled. Examples of possible outputs are:
  • annual mean of concentration,
  • annual mean of deposition,
  • maximum daily mean with nn exceedances,
  • maximum hourly mean with nn exceedances,
  • estimative of the statistical uncertainty, and
  • time series of hourly concentration (only at monitor point locations)
Regulatory StatusRegulatory air dispersion model in Germany

For a full description of the AUSTAL model, please see the model documentation below:

AUSTAL Model Documentation (English)
AUSTAL Programmbeschreibung (German)