Local-Flight
NOW evaluation for a Local-Flight mission.
Parameter Overview
The parameter overview displays a parameter summary, containing all parameter limits considered in the evaluation, as well as additional information on the current weather conditions, which allow the pilot to independently assess the weather situation.
The evaluation, combined with the additional weather information, provide an accurate and reliable decision-making basis for the flight mission.
Components that are part of the parameter overview are the following: a parameter summary, a section for wind direction, wind gusts, precipitation, temperature and pressure, cloud cover & visibility, and METAR/TAF data. These are explained in detail below.
Parameter Sections
This summary provides an overview of all limit parameters considered when assessing the flight capability of the mission. In this example, it includes precipitation, visibility, as well as wind gusts and wind speed, both measured at a standard height of 10 meters above ground level. Based on these parameters, the corresponding indication of flight capability is displayed in the window.
The "WIND DIRECTION" section shows wind direction and speed at the significant heights AGL.
The wind-direction indicator on the left illustrates the wind direction at each altitude, with color-coded arrows corresponding to the heights listed on the right:
10 meters AGL: This is the standard height for wind measurements, as defined by the World Meteorological Organization (WMO).
100 meters AGL: This height is roughly above the atmospheric boundary layer, which typically extends up to about 60 meters AGL. At this level, wind is less affected by surface roughness.
300 meters AGL: Height which is just in the range of a typical flight altitude and wind conditions are more stable.
The "WIND GUST" section indicates wind gust speeds at the significant heights, similar to wind speed. A wind gust is referred to when the instantaneous wind speed exceeds the mean wind speed by at least 10 knots (5 m/s). It is therefore defined as a brief and sudden increase in wind speed.
This section provides key precipitation metrics: the precipitation rate in mm/h, the probability of precipitation, the probability of thunder strikes, and the probability of icing.
This section provides information on temperature, relative humidity, and dew point.
This section provides an overview of cloud cover and visibility conditions during the mission timeframe. It lists low cloud coverage, cloud base, cloud ceiling, and visibility.
Here, the METAR and TAF data for the surrounding airports around the flight location are illustrated, listed by airport designation, along with the distance to the flight location (horizontal arrow) and the altitude at which the METAR data is measured.
Based on the latitude and longitude coordinates, a ranking is created with airports sorted by increasing distance. The first three airports from this list are selected.
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