KR20210110955A - Predicting method of low-level wind shear using instrument landing system at airport - Google Patents

Abstract

The present invention relates to a wind shear prediction method using an instrument landing system of Jeju international airport, which overcomes limitation in observing wind shear generated in a low altitude air route using a low level wind shear warning system. Specifically, the present invention extracts wind prediction data in an altitude unit of 100 ft along an airport landing route from prediction data of a high resolution numerical model and calculates wind shear using the wind prediction data to rapidly give a warning. Therefore, the present invention significantly reduces a phenomenon in which an aircraft (100), taking off and landing at a low altitude equal to or less than 2000 ft, loses lift force and falls in case of an encounter with strong wind shear. The present invention comprises the steps of: finding a grid point adjacent to an end of a landing strip in a high resolution numerical model; extracting wind prediction data; and interpolating the wind prediction data along a glide slope to calculate wind of a landing route.

Description

Wind shear prediction method using instrument landing facilities at Jeju International Airport {PREDICTING METHOD OF LOW-LEVEL WIND SHEAR USING INSTRUMENT LANDING SYSTEM AT AIRPORT}

The present invention relates to a wind shear prediction method using an instrument landing facility at Jeju International Airport, and more specifically, extracting predicted wind data in units of altitude of 100 ft along an airport landing path from prediction data of a high-resolution numerical model, and predicting wind data Jeju International Airport, which can calculate wind shear using It is related to a wind shear prediction method using an airport instrument landing facility.

In general, wind shear refers to a phenomenon in which the direction or strength of the wind abruptly changes.

In addition, aircraft taking off and landing at low altitudes of less than 2000ft are likely to lose lift and fall if they encounter strong wind shear due to their low speed.

Accordingly, when wind shear is predicted or observed on a runway or air route, a wind shear warning can be issued to the airport.

For example, at Jeju International Airport, a Low Level Wind Shear Alert System (LLWAS) is installed to detect low-level wind shear, and wind shear information is produced every 10 seconds.

However, LLWAS consists of a system that observes horizontal wind shear on the runway and issues a wind shear warning to the airport. There is a need for system development.

Republic of Korea Patent Publication No. 1823992 - Aviation safety support method and server

An object of the present invention is to provide a wind shear prediction method using the Jeju International Airport instrument landing facility that can overcome the limitation of not observing wind shear occurring on a low-altitude air route with a low-rise wind shear warning system.

It is an object of the present invention to extract the predicted wind data in units of altitude of 100 ft along the airport landing path from the prediction data of the high-resolution numerical model, and calculate the wind shear using these predicted wind data to quickly issue an alert, The purpose of this project is to provide a wind shear prediction method using the Jeju International Airport instrument landing facility, which can thoroughly reduce the phenomenon of losing lift and falling when an aircraft taking off and landing at an altitude encounters a strong wind shear due to its low speed.

The present invention for achieving the above object

Jeju International Airport comprising the steps of extracting predicted wind data in units of altitude of 100 ft along the airport landing path from the prediction data of the high-resolution numerical model (S10), and calculating wind shear using the predicted wind data (S20) In the wind shear prediction method using the instrument landing facility,

Extracting predicted wind data along the landing path from the high-resolution numerical model of step S10 includes the steps of finding a grid point close to the runway end in the high-resolution numerical model, and predicting wind along the runway azimuth based on the grid point close to the runway end. The basic features of the technical method include the steps of extracting data and extracting the wind of the landing path by interpolating the extracted predicted wind data along the glide angle.

The present invention has an effect of overcoming the limitation of not observing wind shear occurring on a low-altitude air route with a low-level wind shear warning system.

The present invention extracts predicted wind data in units of altitude of 100 ft along the airport landing path from the prediction data of a high-resolution numerical model and calculates wind shear using these predicted wind data to quickly issue an alert, If an aircraft taking off and landing encounters a strong wind shear due to its low speed, it has the effect of thoroughly reducing the phenomenon of losing lift and falling.

1 is a schematic diagram of low-rise wind shear prediction for explaining a wind shear prediction method using an instrument landing facility at Jeju International Airport according to the present invention.
2 is a table showing information on the runway and glide angle of Jeju International Airport for explaining the wind shear prediction method using the instrument landing facility at Jeju International Airport according to the present invention.
3 is a graph showing a comparison of low-rise wind shear prediction and observation data (in the direction of runway 07A) for explaining a wind shear prediction method using an instrument landing facility at Jeju International Airport according to the present invention.

A preferred embodiment of the wind shear prediction method using the instrument landing facility at Jeju International Airport according to the present invention will be described with reference to the drawings, and as such an embodiment, there may be a plurality of them, and through this embodiment, the present invention A better understanding of the purpose, features and advantages is achieved.

1 is a schematic diagram of a low-rise wind shear prediction for explaining a wind shear prediction method using an instrument landing facility at Jeju International Airport according to the present invention, and FIG. 2 is a wind shear prediction using an instrument landing facility at Jeju International Airport according to the present invention. It is a table showing information on the runway and glide angle of Jeju International Airport for explaining the method, and FIG. 3 is a comparison of low-rise wind shear prediction and observation data for explaining the wind shear prediction method using the Jeju International Airport instrument landing facility according to the present invention ( 07A runway direction).

The wind shear prediction method using the Jeju International Airport instrument landing facility according to the present invention is installed in Jeju International Airport to predict wind shear occurring on the landing path of Jeju International Airport, for example, as shown in FIGS. 1 to 3 . Instrument landing facilities and runway information can be utilized, and the wind change according to the altitude change of 100 ft suggested by the Fifth Air Navigation Conference (Montreal, 1967) can be used (5 kt/100 ft) to apply the appropriate wind shear generation standard.

Specifically, the wind shear prediction method using the instrument landing facility at Jeju International Airport according to the present invention uses the instrument landing facility and runway information installed in Jeju International Airport to apply the landing route, for example, as shown in FIG. 1 . can

The wind shear prediction of the Jeju International Airport landing route is largely divided into two stages.

The first step (S10) is to extract predicted wind data in units of altitude of 100 ft along the landing path of Jeju International Airport from the prediction data of the high-resolution numerical model. The second step (S20) is to calculate the wind shear using the extracted predicted wind data.

In order to apply the movement path of the aircraft 100 landing at Jeju International Airport to low-rise wind shear prediction, the instrument landing facility and runway information installed in Jeju International Airport may be used.

The instrument landing facility is one of the navigation safety facilities installed for the safe landing of the aircraft 100, and provides information such as the location, centerline, and glide angle of the runway 200 to induce safe landing of the aircraft 100.

The aircraft 100 that land according to the guidance of the instrument landing facility descends obliquely to the end of the runway of the runway 200 according to a predetermined route.

Specifically, Jeju International Airport has two runways 200, such as the main runway (07/25) and the auxiliary runway (13/31), and the aircraft 100 taking off and landing use the main runway except in special cases. use.

Therefore, low-rise wind shear prediction is made on the main runway landing path, and it is divided into 07A and 25A according to the landing direction (here, A (Approaching) means landing). The information on the azimuth angle of the 07/25 runway, latitude and longitude and altitude at the end of the runway, and the glide angle required for setting the landing route at Jeju International Airport is shown in FIG. 2 .

And, the extraction of predicted wind data along the landing path in the high-resolution numerical model of step S10 consists of the following three steps. The first step is to find grid points close to the runway end in the high-resolution numerical model. The second step is to extract the predicted wind data along the runway azimuth based on the grid points close to the runway end, and the third step is to extract the wind of the landing path by interpolating the extracted predicted wind data along the glide angle.

Furthermore, the wind shear calculation used in step S20 uses the change in wind size per 100 ft of altitude specified in "Manual on Low-Level Wind Shear (ICAO, 2005)" and follows Equation 1 below.

-------------------- [식 1]

-------------------- [Equation 1]

Here, ｕ and ｖ stand for the west and south winds, respectively, and ｈ stands for the altitude. The subscripts A and B denote two points with different elevations, and the unit of the velocity component is knots and the unit of the length component is feet.

Furthermore, since the low-rise wind shear calculation in step S20 uses the predicted wind data extracted by interpolation in units of altitude of 100 ft along the landing path of Jeju International Airport for wind shear calculation, Equation 1 can be simplified as Equation 2 below. .

-------------------- [식 2]

-------------------- [Equation 2]

Furthermore, the low-rise wind shear calculated in step S20 is compared with the wind shear rating table below proposed by the Fifth Air Navigation Conference (Montreal, 1967) to determine the wind shear warning grade. The wind shear rating table proposed by the Fifth Air Navigation Conference (Montreal, 1967) is as follows.

A wind shear warning is generated when a wind shear of a moderate or higher grade is predicted on the landing route of Jeju International Airport. Information that can be included in the warning can be graphed as shown in FIG. 3 on the direction of the landing path where wind shear is expected to occur, the altitude of occurrence, and the wind shear grade and size.

3, the x-axis represents the strength of the wind shear, and the y-axis represents the altitude of the landing path.

At this time, the observation is the wind shear calculated by substituting the wind data observed from the Aircraft Meteorological Data Relay (AMDAR) into Equation 1, and the x mark indicates that the aircraft HL7719 is at 0742~0745 UTC on October 1, 2017. Observed AMDAR data were used, and moderate wind shear with intensity 6.27 kt/100 ft was observed at altitudes between 90 and 950 ft, and the + sign is AMDAR observed by aircraft HL7716 between 0827-0829 UTC on October 1, 2017. Data were used and this is an indication of observed moderate windshear with an intensity of 7.29 kt/100 ft at altitudes between 50 and 830 ft.

And, the prediction is made by extracting the predicted wind data in units of altitude of 100 ft along the airport landing route from the prediction data of the high-resolution scale detailed numerical data calculation system (Korea Meteorological Administration Post Processing, KMAPP), which is a 100 m-resolution numerical model, and using these predicted wind data. This is the wind shear calculated by using the 14-hour forecast data on September 30, 2017, 18UTC as the initial field (KMAPP predicts 00, 16, 12, and 18UTC as the initial field for 48 hours four times a day, UTC: World Standard time, 00UTC = 9:00 a.m.).

Therefore, as shown in Figure 3, it can be seen that a moderate grade wind shear of 5.14 kt/100 ft is predicted at an altitude of 565.6 ft, and a very low wind shear of 1 kt/100 ft or less is predicted at an altitude of 1265.6 ft or higher, and these results are based on AMDAR From the observation data, the wind shear calculated from the observed wind data and the occurrence altitude and intensity class are similar.

As such, the wind shear prediction method using the instrument landing facility at Jeju International Airport according to the present invention can overcome the limitation of not observing wind shear occurring on low-altitude air routes with a low-rise wind shear warning system, and in particular, a high-resolution numerical model. Aircraft taking off/landing at altitudes less than 2000ft ( 100) is a low speed, so if you encounter a strong wind shear, you will lose lift and fall down completely.

The present invention can be used in the industrial field for predicting wind shear on an airport landing path to induce a safe landing of an aircraft.

100: aircraft
200: runway

Claims (4)

Jeju International Airport comprising the steps of extracting predicted wind data in units of altitude of 100 ft along the airport landing path from the prediction data of the high-resolution numerical model (S10), and calculating wind shear using the predicted wind data (S20) In the wind shear prediction method using the instrument landing facility,
Extracting the predicted wind data along the landing path from the high-resolution numerical model of step S10 includes the steps of finding a grid point close to the runway end in the high-resolution numerical model, and predicting wind along the runway azimuth based on the grid point close to the runway end. A wind shear prediction method using an instrument landing facility at Jeju International Airport, comprising the steps of extracting data and extracting the wind of the landing path by interpolating the extracted predicted wind data along the glide angle. According to claim 1,
The wind shear calculation in step S20 uses the change in wind size per 100 ft of altitude specified in "Manual on Low-Level Wind Shear (ICAO, 2005)" and utilizes the Jeju International Airport instrument landing facility, characterized in that it follows Equation 1 below. A wind shear prediction method.

[Equation 1]
ｕ and ｖ stand for west and south winds, respectively, and ｈ stands for altitude. The subscripts A and B denote two points with different altitudes, and the unit of the velocity component is knots and the unit of the length component is feet. 3. The method of claim 2,
The wind shear calculation in step S20 uses the predicted wind data extracted by interpolation in units of altitude of 100 ft along the airport landing path for wind shear calculation, so Equation 1 is simplified as Equation 2 below. Wind shear prediction method using landing facilities.

[Equation 2] 4. The method of claim 3,
The low-rise wind shear calculated in step S20 is compared with the wind shear rating table below suggested by the Fifth Air Navigation Conference (Montreal, 1967) to determine the wind shear warning grade. Shea prediction method.

Images