Definition of content and presentation of eGAFOR
The partners have agreed that eGAFOR will be interactive web based product intended primarily for use on mobile devices. Users shall access eGAFOR product via the www.egafor.eu website.
Content of eGAFOR
The eGAFOR product will be a graphical 6 hours forecast divided into three 2-hours intervals. For each time interval it will present user-friendly impact forecast on routes. Impact forecasts shall depend on meteorological forecasts and relation between these forecasts is defined in “Report on defined forecasting criteria for individual MET elements”.
eGAFOR product will consist of:
- Background map with overlaid route network
- Layers with MET element polygons
- Layer with forecasts for each route
Probability classes
In order to meet user request to include probability in the eGAFOR forecast, each forecast MET element (meteorological phenomenon) shall have a corresponding probability of occurrence. The probabilities shall be grouped into three probability classes:
LOW = 10 – 30%
MEDIUM = 30 – 70 %
HIGH = above 70
%
Meteorological forecast
For each time interval of the eGAFOR forecast, each forecast MET element (meteorological phenomenon) shall be entered as a polygon defined by a probability of occurrence and severity or category of the phenomenon. If a MET element is not forecast in the time interval or is not significant, no corresponding polygon shall be entered.
Impact forecast
To make a forecast understandable to users, the eGAFOR system should translate meteorological forecast into impact (state of the route) shown in “traffic-light” colors*. The impact shall be divided into four states:
| RED | Closed |
| ORANGE | Marginal conditions, not suitable for standard VFR operations, high level risk for air crew under VFR conditions (high level of skills and knowledge of local conditions and terrain is prerequisite) |
| YELLOW | Difficult weather condition for VFR operations (high level of skills and knowledge of local conditions is prerequisite) |
| GREEN | Open |
The relation between forecasted MET elements and impact is shown in the Report on defined forecasting criteria for individual MET elements.
*Colors may be subject to change during the defining of the Technical requirements.