MACIS documentation Wind: 1. Relative frequency of mean wind speed b. Treshold values: mean wind speed greater, greater equal, less, less equal 3, 5, 10, 12, 15 20, 22, 25 kt 2. Relative frequency of gusts (in case of reported gusts) b. Treshold values: Gusts greater, greater equal 15, 20, 25, 30, 35, 40, 45 kt 3. Relative frequency of mean wind speed versus wind direction b. wind direction every 10 (wind direction 0 means VRB) c. intervals for wind speed: calm, 1-5, 6-10, 11-15, 16-20, 21-25, 26-30, 31-35, 36-40, 41-45 kt 4. Relative frequency of mean wind speed versus wind direction class b. wind direction every 30 : N, NNE, ENE, E, ESE, SSE, S, SSW, WSW, W, WNW, NNW c. intervals for wind speed: calm, 1-5, 6-10, 11-15, 16-20, 21-25, 26-30, 31-35, 36-40, 41-45 kt 5. Extreme peak gust For each month and every year b. Wind direction of the extreme peak gust c. Wind speed of the extreme peak gust d. Time of the report of the extreme peak gust Pressure: 1. Mean, maximum and minimum pressure Temporal resolution: 2. Mean, maximum and minimum PressureAltitude Temporal resolution: 3. Mean, maximum and minimum DensityAltitude Temporal resolution: Relative Humidity: 1. Relative frequency of the relative humidity b. Treshold values: Relative humidiy greater than
10, 20, 30, 40, 50, 60, 70, 80, 90 % Significant Weather: 1. Relative frequency of significant weather b. Significant weather grouped by i. Precipitation: All reports containing SN, RA, DZ, SG, PL, UP, GR or GS ii. Thunderstorm: All reports containing TS iii. Showers: All reports containing SH iv. Freezing Precipitation: All reports containing FZ, but not containing FG v. Rain and drizzle: All reports containing RA and DZ, but not containing SH or TS vi. Snow: All reports containing SN, SG and PL, but not containing SH or TS vii. Soft hail and hail: All reports containing GS or GR viii. Fog: All reports containing FG ix. Haze: All reports containing BR, FU, HZ, SA or DU 2. Occurence (mean number of events in the given time) of significant weather b. significant weather grouped as described above Visibility: 1. Relative frequency of visibility b. Treshold values: Visibility greater equal and less than 0,1, 0,2, 0,3, 0,5, 0,8, 1,6, 3,7, 5,0, 8,0 km c. Interval of visiblity: Visibility between 0-0,1; 0,1-0,2; 0,2-0,3; 0,3-0,5; 0-0,8; 0,8-1,6; 1,6-3,7; 3,7-5,0; 5,0-8,0 km Spread: 1. Relative frequency of Spread b. Treshold values: Spread equal or in between the named treshold values
0; 1; 2; 3 to 5; 6 to 10; greater 10 K Ceiling: 1. Relative frequency of Ceiling b. Treshold values: Ceiling and/or vertical visibility greater equal and less than 50, 100, 200, 300, 700, 1500, 2500, 20000 ft AGL c. Intervals of ceiling heights: Ceiling and/or vertical visibility between 0 to 50; 50 to 100; 0 to 200; 200 to 300; 300 to 700, 700 to 1500; 1500 to 2500; 2500 to 20000 ft Total Sky Cover: 1. Relative frequency of total sky cover for clouds lowmark less equal 5000 ft b. classes of total sky cover: CLEAR, FEW, SCT, BKN, OVC, OBSC, UNKNOWN Temperature: 1. Relative frequency for different temperature values b. Temperature values: i. Absolute minimum, absolute maximum ii. Mean minimum, mean maximum iii. Mean temperature 2. Mean number of days b. Temperature values: i. Ice days ii. Frost days iii. Summer days iv. Tropical days Visibility versus Ceiling: 1. Relative frequency of visibility versus ceiling b. Treshold values of visibility greater equal 9999, 8000, 5000, 3700, 1600, 1000, 800, 500, 300, 200, 100 m
c. Treshold values of ceiling greater equal 20000, 18000, 16000, 14000, 12000, 10000, 9000, 8000, 7000, 6000, 5000, 4000, 3000, 2000, 1000, 900, 800, 700, 600, 500, 400, 300, 200, 100 ft AGL Hazard Weather: 1. Relative frequency hazardous weather following the classification of MeteoTrack b. Significant weather grouped by i. Thunderstorm and hail and soft hail ii. Visual limitation, moderate iii. Visual limitation, severe iv. other, light to moderate v. other, severe vi. Freezing precipitation, light vii. Freezing precipitation, moderate viii. Freezing precipitation, severe ix. Snow, severe x. Snow, moderate xi. Snow, light xii. Rain or drizzle, severe xiii. Rain or drizzle, light xiv. Rain or drizzle, moderate 2. Occurence (mean number of events in the given time) of significant weather b. significant weather grouped as described above
Dokumentation Meteorological formulas used for the calculations in MACIS: Density Altitude: http://www.srh.noaa.gov/images/epz/wxcalc/densityaltitude.pdf Pressure Altitude: http://www.srh.noaa.gov/images/epz/wxcalc/pressurealtitude.pdf Station Pressure from QNH: https://de.wikipedia.org/wiki/barometrische_h%c3%b6henformel -> "Internationale Höhenformel" Vapor pressure: Magnusformula Date: 24th August 2016