KR101702582B1 - Weather clutter composite and display system and method thereof - Google Patents

Abstract

The present invention relates to a system of combining and displaying weather clutters capable of displaying distribution and intensity of weather clutters on a flight trajectory by combining a predicted flight trajectory of a shot with data of a weather radar installed around a weapon system test site, and a method thereof. The system of combining and displaying weather clutters comprises: a weather radar measuring weather radar data; a weather data transmission server receiving weather radar data measured in the weather radar; a weather data interlinking server receiving the weather radar data from the weather data transmission server through a weather network; and an application (web) server displaying weather clutters existing on the predicted flight trajectory by receiving encrypted weather radar data from the weather data interlinking server through an exclusive network and combining the weather radar data with the predicted flight trajectory data.

Description

WEATHER CLUTTER COMPOSITE AND DISPLAY SYSTEM AND METHOD THEREOF FIELD OF THE INVENTION [0001]

The present invention relates to a weather clutter composite display system and method for displaying weather clutter distribution and intensity on a flight trajectory by combining a weather radar data installed in an area near a weapons system test site and an expected flight locus of a shot.

Changes and forecasts on weather are an important part of everyday life. In the weapons system test site, it is often the case that the flight test for measurement is not carried out due to rain, snow or fog.

It is one of the important tasks to track the guns / ammunition and guided weapons at the weapons system test site and to provide the data by measuring the ballistics data, the optical image, and the event occurrence. For the tracking of guns / ammunition and guided weapons (hereinafter referred to as "coal"), ballistic measuring radar and optical tracking equipment are used.

These instruments are affected by weather clutter, although there is a difference in degree. Clutter is a term used in the field of radar and refers to unwanted signals reflected from the natural environment. Clusters include ground, sponges, weather, birds and worms. Weather clutter includes rain, snow, hail, clouds and fog. The weather clutter is a factor for reducing the radar performance in the microwave signal in the high frequency band and the millimeter wave frequency band. The weather clutter also attenuates the electromagnetic signal and affects the target detection. Especially, when the shot enters the clutter such as the cloud, image tracking using optical tracking equipment can not be performed. When the radar cross section of the shot is smaller than the cloud, The measurement radar will not be able to track.

Therefore, there is a need for a system and method for confirming the distribution and intensity of weather clutter such as clouds on the flight path of the bullet before the flight test, so as to confirm the influence on the measurement equipment in advance.

The present invention provides a weather clutter composite display system and method for intuitively confirming weather clutter distribution and intensity on a flight trajectory before a flight test.

According to an aspect of the present invention, there is provided a climate clutter composite display system including: a weather radar for measuring weather radar data; A meteorological data transmission server receiving meteorological radar data measured in a weather radar; A meteorological data interworking server for receiving weather radar data from a weather data transmission server through a weather network; And an APP (Web) server for receiving the encrypted weather radar data from the weather data interworking server through a dedicated network and displaying the weather clutter on the expected flight trajectory by synthesizing the weather radar data with the expected flight trajectory data; .

According to another aspect of the present invention, there is provided a method for displaying a weather clutter composite, comprising: receiving weather radar data measured by a weather radar; Receiving an expected flight trajectory data of the shot; And displaying the weather clutter present on the expected flight trajectory by combining the received weather radar data and the input anticipated flight trajectory data, Climate clutter is classified and combined with the expected flight trajectory.

The present invention combines the expected flight trajectory indicated by the geographical coordinate system with the weather clutter data received from the weather radar and displays the presence of the weather clutter and the intensity of the weather clutter at the point where the car is flying, By intuitively identifying the distribution of meteor clutter in the expected flight trajectory, the possibility of measurement using ballistic metering radar and optical tracking equipment can be predicted prior to the flight test.

Accordingly, the present invention has the effect of minimizing the influence on the tracking equipment through the change of the launch direction and the launch angle when the climatic clutter is locally located around the flight trajectory. Further, in the present invention, since the weather radar continuously observes data such as the distribution, intensity and speed of the climatic clutter, it can predict the change of climatic clutter around the expected flight trajectory, It is effective.

1 is a view showing a scan region of a weather radar.
Fig. 2 is an example of displaying the detected weather clutter on the PPI of the vapor ladder.
FIG. 3 shows an example of displaying the detected weather clutter on the CAPPI
4 is a configuration diagram of a weather clutter composite display system according to the present invention.
FIG. 5 is a flowchart showing a method of displaying a climatic clutter composite on a flight path of a shot in a weather clutter composite display system according to the present invention. FIG.
6 is a diagram showing an expected flight trajectory of a shot in a geographical coordinate system.
7 shows a weather clutter distribution for the detected distance versus altitude;
8 and 9 are views showing an example of a display method of a weather clutter synthesized with an expected flight locus.

It is necessary to know the distribution of climatic clutter before flight test and to predict the possibility of fluctuation for smooth measurement in flight test on the ammunition system test site.

The present invention relates to a method and system for remotely receiving weather radar data from a weapon system test site near a weapons system test site in a weapons system test site, and then synthesizing (combining) the expected trajectory of the shot, We propose a plan to display.

Fig. 1 shows a scan area of a weather radar. Fig. 2 shows an example of displaying the detected weather clutter on the PPI of the weather ladder, and Fig. 3 shows an example of displaying the detected weather clutter on the CAPPI.

Referring to FIG. 1, a weather radar scans an azimuth angle, scans an azimuth angle, and then detects a weather clutter. The detected weather clutter is displayed on the plan position indicator (PPI) of the weather radar. The PPI displays the detection information in a polar coordinate system as a range and an azimuth.

The weather radar will scan the azimuth angle again after changing the elevation angle, so you can see the weather clutter for the volume in the PPI. In particular, as shown in FIG. 3, weather clutter detection and display data for the horizontal cross section at the same altitude (or altitude) is referred to as CAPPI (constant altitude plan position indicator).

Such weather radar data may be received from a weather station or air force weather radar located nearby if it does not have a separate weather radar. For this purpose, a weather radar data reception system should be constructed to receive weather radar data.

4 is a configuration diagram of a weather clutter composite display system according to the present invention.

4, the weather clutter composite display system includes a weather radar 101 for measuring the weather radar data 109 and a weather radar data 109 measured by the weather radar 101, A weather data interlocking server 105 for receiving and storing the weather radar data 109 from the weather data transmission server 102 via the weather network 103, And receives the encrypted weather radar data 109 from the weather data interworking server 105 and combines the weather radar data 109 and the expected flight log data 110 entered by the operator to generate a weather clerk An APP (Web) server 108 for detecting weather distribution and intensity, and display equipment 11 for displaying weather clutter distribution and intensity for the detected expected flight trajectory. Here, a reference numeral 104 denotes a firewall, and 106 denotes a cryptographic equipment.

The weather radar data 109 may include CAPPI, which is weather clutter detection and display data for a horizontal plane at the same altitude (or altitude).

The expected flight trajectory data 110 includes the expected flight trajectory of the shot and the direction of the shot of the shot.

The operation of the climatic clutter synthesis and display system according to the present invention will now be described with reference to the accompanying drawings.

FIG. 5 is a flow chart showing a method of displaying a climatic clutter synthesis display on a flight path of a shot in a climatic clutter synthesis display system according to the present invention, and FIG. 6 shows an expected flight path of a shot in a geographic coordinate system.

First, the APP server 108 receives the weather radar data 109 from the weather radar 101 (S100). The weather radar data 109 may include CAPPI, which is weather clutter detection and display data for a horizontal plane at the same altitude (or altitude).

That is, the weather radar data 109 received from the weather radar 101 is first stored in the weather data transmission server 102 and then transmitted to the weather data interlocking server 105 via the weather network 103 through the firewall 104 . The weather radar data 109 transmitted to the weather data interworking server 105 is transmitted through the private network 107 after being encrypted in the cryptographic equipment 106 through the firewall 104 and the transmitted encrypted weather radar data 109 (109) is again decrypted in the cryptographic equipment (106) and then transferred to the APP server (108).

When the weather radar data 109 is received, the operator can obtain the flight path and the launch direction of the bullet before the flight test and input it to the APP server 108 (S110).

In general, the flight trajectory of a shot is displayed in a rectangular coordinate system based on the launch point. Therefore, in order to synthesize the expected trajectory of the shot with the weather radar data, the expected trajectory of the shot should be represented by the geographical coordinate system, so that a series of coordinate conversion process should be performed (S120). The process of converting the color is as follows.

First, the flight trajectory data X (Equation 1) in a rectangular coordinate system based on the launch point is converted into Earth Centered Earth Fixed Cartesian Coordinates (ECEF).

[Equation 1]

행렬을 이용하여 Z축을 중심으로 발사 방위각

만큼 반시계 방향으로 회전한다. Then, the X vector is transformed into

Using the matrix, the firing azimuth around the Z axis

As shown in FIG.

&Quot; (2) "

행렬을 이용하여 Z축과 X축을 변경한다.Since the Z-axis is true north in the in-plane orthogonal coordinate system,

Use the matrix to change the Z and X axes.

&Quot; (3) "

만큼 수학식 4의

행렬을 이용하여 Y축을 중심으로 회전한다.Then the latitude of the launch point

As shown in Equation 4

It rotates around the Y axis using the matrix.

&Quot; (4) "

만큼 수학식 5의

행렬을 이용하여 Z축을 중심으로 반시계 방향으로 회전시킨다. Finally, the longitude of the launch point

As in Equation 5

Rotate counterclockwise around the Z axis using the matrix.

&Quot; (5) "

In Equation (2), the process of Equation (5) can be summarized as Equation (6).

&Quot; (6) "

는 다음의 수학식 7과 같이 나타낼 수 있다. Therefore, the flight trajectory data in the deformed orthogonal coordinate system using Equation (6)

Can be expressed by the following Equation (7).

&Quot; (7) "

를 지리 좌표계로 변환하며, 그 과정은 다음과 같다. Then, the flight trajectory data converted into the above-

To the geographical coordinate system, and the process is as follows.

First, the hardness is calculated using Equation (8).

&Quot; (8) "

Then, the latitude is calculated using Equation 9 and used as an initial value of an iteration loop for obtaining altitude.

&Quot; (9) "

In this case, the altitude is the value when converging to the range of a few centimeters through the iteration loop. The iterative loop is performed by the following equations (10) to (12).

는 지원 타원체의 장반경이며 e는 타원의 제1이심율(the first eccentricity of ellipse)이다.That is, the radius of curvature in the prime vertical at the latitude is calculated using Equation (10). In Equation (10)

Is the long axis of the supporting ellipsoid and e is the first eccentricity of ellipse.

&Quot; (10) "

The initial latitude (Equation 9) is input to Equation 11 to calculate the altitude h, the next initial latitude is updated using Equation 12, and the result is input again to Equation 11 to calculate the altitude .

&Quot; (11) "

&Quot; (12) "

Through the loop operation as described above, it is possible to convert the geomorphic rectangular coordinate system into the geographical coordinate system. The expected trajectory of the shot in the converted geographic coordinate system can be shown in FIG. Figure 7 shows the weather clutter distribution for the detected distance versus altitude.

The APP server 108 analyzes the CAPPI, which is weather data, to detect the distribution of weather clutter with respect to the distance and the altitude as shown in FIG. 7 (S130, S140) The distribution is combined with the expected flight trajectory data indicated by the geographical coordinate system (S150). At this time, since the weather radar scans the azimuth angle while changing the elevation angle, the APP server 108 classifies and extracts climatic cluters according to the estimated flight altitude and combines them with the expected flight locus of the bomb.

Accordingly, the APP server 108 displays the weather clutter synthesized with the expected flight trajectory on the display device 111, so that the presence of the weather clutter and the intensity of the weather clutter can be intuitively determined . In this case, the APP server 108 may display the weather clutter combined with the expected flight trajectory in various ways on the exhibition equipment 111. [

Figs. 8 and 9 show an example of a display method of the weather clutter synthesized with the anticipated flight trajectory.

According to one embodiment, the APP server 108 shows the expected flight trajectory and the weather clutter data synthesized, as shown in FIG. 8, in terms of the launch direction, so that the operator intuitively detects weather clutter Can be confirmed. In accordance with another embodiment, the APP server 108 depicts weather clutter distributed over the altitude of the shot, as shown in FIG. 9, along with the intensity, and allows the operator to review the traceability of the instrumentation radar and optical equipment .

As described above, the present invention combines the expected flight trajectory indicated by the geographical coordinate system and the weather clutter data received from the weather radar, and displays the presence of the weather clutter and the intensity of the weather clutter at the point where the car is flying, By intuitively identifying the distribution of meteor clutter on the expected flight trajectory prior to the flight test, the possibility of measurement using ballistic metering radar and optical tracking equipment can be predicted before the flight test.

In addition, the present invention intuitively confirms the distribution of weather clutter with respect to the expected flight trajectory before the flight test, so that when the weather clutter is locally located around the flight trajectory, The effect can be minimized.

Also, in the present invention, since the weather radar continuously observes data such as the distribution, intensity, and speed of the climatic clutter, it can predict the change of climatic clutter around the expected flight trajectory, .

It will be appreciated that the configurations and methods of the embodiments described above are not to be limited and that the embodiments may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive.

101: meteorological instrument 102: meteorological data transmission server
105: Virtual data interworking server 108: APP server
109: Weather radar data 110: Expected flight trajectory data
111: Exhibition equipment

Claims (9)

A weather radar that scans an azimuth while changing elevation angles to measure elevation constant altitude plan position indicator (CAPPI);
A meteorological data transfer server receiving the CAPPI measured in the weather radar;
A weather data interworking server for receiving CAPPI from the weather data transmission server through a weather network; And
Receiving the encrypted CAPPI from the weather data interworking server, synthesizing the weather clutter classified in the CAPPI and the expected flight trajectory data of the shot, and calculating the weather clutter affecting the measurement performance of the measurement instrument on the expected flight trajectory Exhibiting distribution and intensity A web server,
The web server
(a) analyzing the CAPPI to classify climatic clusters at the expected flight altitude of the shot,
(b) predicting the measurement performance of the metrology equipment based on the distribution and intensity of the weather clutter displayed on the expected flight trajectory to determine the change of the shot direction, the change of the shot angle, and the shot shooting time Climate clutter composite display system. delete 2. The method according to claim 1,
Wherein the operator inputs and stores the predicted flight trajectory of the shot and the shot direction of the shot. delete delete The system according to claim 1, wherein the web server
Wherein the predicted flight trajectory and the combined weather clutter data are displayed for the launch direction. Receiving an altitude-specific constant altitude plan position indicator (CAPPI) measured in a weather radar;
A coordinate transformation of the expected flight path of the rectangular coordinate system into the geographical coordinate system by receiving the expected flight trajectory data of the shot;
Analyzing the received CAPPIs to classify climatic clusters according to the expected flight altitude;
Transforming the predicted flight trajectory of the coordinate transformed geographical coordinate system and the weather clutter for each of the classified flying bombs to display the distribution and intensity of the weather clutter on the expected flight trajectory on the display equipment; And
And estimating the measurement performance of the metering equipment based on the distribution and intensity of the weather clutter displayed on the expected flight trajectory to determine the change of the shooting direction, Wherein the weather clutter composite display method comprises the steps of: delete The method of claim 7, wherein displaying the weather clutter
Wherein the predicted flight trajectory and the combined weather clutter data are displayed for the launch direction.

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