Machine learning-based turbulence-risk prediction method for the safe operation of aircrafts

Journal of Big Data

Table 3 List of data used

Weather data	Time (UTC)	Altitude (hPa)	Descriptive variables
Weather data	Time (UTC)	Altitude (hPa)	Name	Description
fx106 (FXJP106) [32]	0000Z	500	spd	Wind speed (knots)
fx106 (FXJP106) [32]	0300Z	700	shear	Wind speed difference^a (knots/feet)
fx502 (FXFE502) [32]	0000Z	500	low	Low pressure (yes = 1, no = 0)
			trough	Trough (yes = 1, no = 0)
			alt	Number of contour lines between Wajima and Tateno
MA (Matsumoto high-rise weather)	1200Z^b	500	spd	Wind speed (knots)
		700	hum	Humidity (%)
			dir	Wind direction (°)
			temp	Temperature (°C)
WA (Wajima high-rise weather)	1200Z^b	500	spd	Wind speed (knots)
		700	hum	Humidity (%)
			dir	Wind direction (°)
			temp	Temperature (°C)
TA (Tateno high-rise weather)	1200Z^b	500	spd	Wind speed (knots)
		700	hum	Humidity (%)
			dir	Wind direction (°)
			temp	Temperature (°C)
MMJ meteorological terminal air report (METAR)^c	2310Z		temp	Air temperature (°C)
			dwp	Dew point (°C)
			relh	Relative humidity (%)
			dir	Wind direction (°)
			spd	Wind speed (knots)
			alt	Altimeter (inches)
			vsby	Visibility (miles)
			gust	Wind gust (knots)
			vis1^d	Cloud height level 1 (feet)
			vis2^d	Cloud height level 2 (feet)
			vis3^d	Cloud height level 3 (feet)

^a500 hPa only
^bPrevious day
^cRefers to the weather at Matsumoto Airport. Only the names of METAR elements are used; the time and altitude are not described
^dNot available (NA) values in this field were replaced with 10,000