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Requirements
Welcome to the AMVR wiki!
An airfield manager demands information for maintaining security and continuity of ground operations on an airfield. Needed informations amongst others are:
- local weather data, with local wind being the most important
- weather forecast
- weather radar
- near airfield traffic and potential danger
- time
Whether forecast or actual measure, this information is essential, with the local wind being the most important. In descending importance are of interest:
- wind
- temperature and dew point
- local athmospheric pressure and QNH trend against official measure, with the official measure to be gathered once from others.
- Lightning and rain/hail radar overlay, will need an internet connectivity to weather forecast providers.
Information about others in-air and whether potentially endangering the ground operation.
The most obvious info about others is position and height. That is a basic function of a radar. Additionally callsign or competitionID in means of an ID as well as vertical speed are of interest in case of both a map display as well as a list display.
Whereas in-air the loci of reach or estimated time o arrival are of interest, on the ground the targets, possibly arriving at the airfield in a certain time are of interest. There should be a visualization similar to collision warning about aircraft’s proximity following these criteria:
- COA: Course Of Arrival. The aircraft's course intersects with a cylinder around the airfield's position.
- TOA: Time Of Arrival within the airfield cylinder will be less than 120 / 60 / 20 / 10 sec with corresponding warning level.
- HOA: Height Of Arrival will be lower than the height of the Cylinder around the airfield's reference point.
In order to not clutter the presentation screen, aircrafts beyond interest should not be displayed. To filter out far aircrafts, more simple filter conditions are appropriate. With heigths exceeding more than 3000m QFE and TOA more than 5 minutes it is assumed to be targets of no interest.
Just a simple UTC display, derived from GPS reception.
All the same as in-flight, minimal interaction with the information display is a top design goal when designing the flight manager’s virtual radar. Thus, a highly parallel presentation is needed, not to switch between information screens, taking time for user interface control interaction, missing in the manager’s awareness time budget.