JP2633802B2 - 3D display device for weather radar images - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional display device for weather radar images, and more particularly to an improvement in a display system.

[0002]

2. Description of the Related Art A meteorological pulse radar device generally has an antenna control device and is capable of observing all directions of 360 °, and is capable of changing the observation elevation angle of the radar antenna. Because the purpose is to observe a wide range of rainfall and snow conditions at a low elevation angle, in many cases a planar display ("PPI display": Plan Position Indication)
When the observation elevation angle of the radar antenna is switched, a PPI display is performed by switching the echo intensity for each altitude for each altitude.

Here, the process of calculating echo intensity data for each altitude from observation results at a plurality of observation elevation angles and creating PPI display data is called iso-altitude data processing (CAPPI processing: Constant Altitude PPI processing). However, when it is necessary to grasp the details of rainfall and snow conditions, for example, in river management, or in research observations that analyze the mechanism and structure of rainfall, the vertical distribution of rainfall and snow can be checked at a glance. The PPI display method described above is not suitable as a display method in such a case.

In order to examine the vertical distribution of rainfall and snow, for example, the echo intensity (meteorological radar image) calculated for each altitude is constructed as shown in FIG.
Display is performed in three dimensions in the north-south direction and the altitude direction (FIGS. 7 and 8). This has been realized with the progress of the graphic display technology in recent years.

FIG. 4 shows a weather radar device (1, 2, 3, 4) arranged in a remote place such as a mountain and a remote place, and a three-dimensional display device (7, 8, 9b) arranged in an urban area or the like. ) Are connected by communication lines (5, 6).

The weather radar devices (1, 2, 3, 4)
For example, as shown in FIG. 5, the observation elevation angle (θ
₁ , θ ₂ , θ ₃ , θ ₄ ) are changed at regular time intervals and are periodically repeated, and the antenna control device 3 controls the antenna device 2 to change the elevation angle of the antenna according to this schedule. And the signal processing device 4
Then, the received power data at a plurality of elevation angles are collected (FIG. 6) and transmitted to the three-dimensional display device via the communication lines (5, 6).

The three-dimensional display device is a CAPPI processor 7
And an arithmetic processing unit 8 and a display device 9b. The received power data at a plurality of elevation angles acquired by the weather radar device are input to the CAPPI processing device 7 and the arithmetic processing device 8.

The CAPPI processing device 7 receives the received power data at a plurality of elevation angles (FIG. 6), calculates the echo intensity data for each altitude as described above, and gives it to the arithmetic processing device 8.

The arithmetic processing unit 8 includes a CAPPI processing unit 7
Calculates the rain / snow intensity distribution for each altitude based on the output of
Create I display data and provide it to the display device 9b. In addition, the arithmetic processing unit 8 calculates the amount of rain and snow for each elevation angle in a plurality of elevation angles acquired by the weather radar device input from the communication control device 6, and provides the result to the display device 9b.

The display device 9b displays a map of the observation range at the bottom of the screen with a horizontal extent, and displays a map of the observation range on the upper portion based on the rainfall snow intensity distribution for each altitude calculated by the arithmetic processing unit 8. The echo intensity (weather radar image) formed by associating the wide spread with the altitude direction is displayed.

More specifically, the echo intensity for each altitude is displayed in different colors, and as shown in FIG. 7, the echo intensity for each altitude layer is displayed two-dimensionally and stacked, or
As shown in FIG. 8, a display method is employed in which the echo intensity for each altitude layer is expressed in a finely divided three-dimensional body.

The display device 9b can switch between the three-dimensional display shown in FIGS. 7 and 8 and the PPI display of the rainfall amount for each altitude calculated by the arithmetic processing unit 8.

[0013]

However, in the display methods shown in FIGS. 7 and 8, the structure of the weather echo can be grasped, but it is difficult to associate with the map of the observation range at the bottom of the screen. However, there is a problem that it is difficult to determine the geographical positional relationship of the weather echo.

In order to cope with this problem, conventionally, a plurality of screens having different observation directions are switched and displayed so that the weather echoes can be viewed from different viewpoints, or they are continuously rotated and displayed. Operation is possible, but lacks in agility and requires experience to specify the positional relationship, and improvement is desired.

An object of the present invention is to provide a three-dimensional weather radar image display device provided with a display means capable of easily and quickly specifying the geographical positional relationship of weather echoes without skill.

[0016]

To achieve the above object, a three-dimensional weather radar image display apparatus according to the present invention has the following arrangement. That is, 3 of the weather radar image of the present invention.
A three-dimensional display device for calculating echo intensity data for each altitude from observation results for each elevation obtained by a variable-angle weather radar; an altitude data processing device; An arithmetic processing unit for calculating the distribution of rainfall and snow intensity for each altitude; a map of the observation range is displayed at the bottom of the screen with a horizontal spread, and the rainfall and snowfall for each altitude calculated by the arithmetic processing unit is displayed above the map. A display device for displaying a weather radar image formed by associating a horizontal spread and an altitude direction based on the intensity distribution; and a three-dimensional display device for the weather radar image, comprising: Means for detecting a boundary indicating rainfall snow of a predetermined value or more for each altitude in response to the calculated rainfall snow intensity distribution for each altitude, and superimposing the boundary at all altitudes; Means for projecting and displaying a boundary contour indicating rainfall snow formed in the horizontal plane on the map Ri;
It is characterized by having.

[0017]

The operation of the three-dimensional weather radar image display apparatus of the present invention configured as described above will be described. In the three-dimensional weather radar image display device of the present invention, a boundary indicating rainfall snow above a predetermined value is detected for each altitude, and a boundary contour indicating rainfall snow in a horizontal plane is obtained by superimposing the boundaries at all altitudes. It is projected and displayed on the map.

As a result, the geographical positional relationship of the three-dimensionally displayed weather echo distribution can be grasped at a glance on one screen, so that the geographical positional relationship can be specified immediately.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a three-dimensional weather radar image display apparatus according to one embodiment of the present invention. In the present invention, the display device 9a shown in FIG. 4 is obtained by adding some functions to the display device 9a, and other configurations are the same as those of the conventional device.

The display device 9a of the present invention performs the following operations. First, based on the rainfall snow intensity distribution at each altitude calculated by the arithmetic processing device 8, a boundary indicating rainfall snow of a predetermined value or more at each altitude is detected. Here, the predetermined value adopts the lowest rainfall snowfall, for example, the rainfall snowfall of 2 mm / h.

Next, the detected boundaries for all the altitudes are superimposed for all altitudes to obtain a boundary contour indicating rainfall and snow in a horizontal plane.

Then, a boundary contour indicating rainfall snow formed in a horizontal plane by superposition is projected and displayed on a map.
At this time, only the boundary contour (line) may be displayed, but from the viewpoint of visibility, the gradation in the contour may be changed and projected on a map like a shadow of a weather echo distribution.

As a result, as shown in FIGS. 2 and 3, the geographical positional relationship of the distribution of the three-dimensionally displayed weather echo can be easily and quickly grasped at a glance on one screen.

[0024]

As described above, the three-dimensional weather radar image display apparatus according to the present invention detects a boundary indicating rainfall or snowfall of a predetermined value or more for each altitude, and superimposes the boundaries at all altitudes on a horizontal plane. Since means for obtaining a boundary contour indicating rainfall and snow within the area and projecting and displaying the boundary contour on a map are provided,
The geographical position of the distribution of weather echoes displayed in three dimensions is 1
You can grasp at a glance on one screen and immediately identify the geographical location. Therefore, it is possible to provide very useful information for river management work that requires detailed rainfall and snowfall data for measures against actual rainfall and snowfall, and for work on analyzing the mechanism and structure of rainfall and snow from a research and research perspective. There is.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a three-dimensional weather radar image display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a three-dimensional display example of weather echo intensity (at each altitude stratum) according to the display method of the present invention.

FIG. 3 is a diagram illustrating an example of a three-dimensional weather echo intensity display (stereo combination) according to the display method of the present invention.

FIG. 4 is a configuration block diagram of a conventional three-dimensional weather radar image display device.

FIG. 5 is a diagram illustrating an example of a change aspect of an observation elevation angle of a radar antenna.

FIG. 6 is a conceptual diagram of acquisition of iso-altitude echo intensity and calculation of weather echo intensity distribution.

FIG. 7 is a diagram showing a three-dimensional display example of weather echo intensity (each altitude layer) according to a conventional display method.

FIG. 8 is a diagram showing an example of a three-dimensional weather echo intensity display (stereo combination) according to a conventional display method.

[Explanation of symbols]

 Reference Signs List 1 transceiver 2 antenna device 3 antenna control device 4 signal processing device 5 communication control device 6 communication control device 7 CAPPI processing device 8 arithmetic processing device 9a display device

Claims (2)

(57) [Claims] An iso-altitude data processor for calculating echo intensity data for each altitude from an observation result for each elevation obtained by a variable-elevation-type meteorological radar; An arithmetic processing unit for calculating the distribution of the intensity of rainfall and snow for each; a map of the observation range is displayed at the bottom of the screen with a horizontal spread, and the rainfall and snow for each altitude calculated by the arithmetic processing unit above the display; A display device for displaying a weather radar image formed by associating a horizontal spread and an altitude direction based on the intensity distribution; and a three-dimensional display device for the weather radar image, comprising: Means for detecting a boundary indicating rainfall snow of a predetermined value or more for each altitude in response to the rainfall snow intensity distribution at each altitude, and superimposing the boundary at all altitudes; Means for projecting and displaying a boundary contour indicating rainfall snow formed in a plane on the map;
A three-dimensional display device for weather radar images, comprising: 2. The three-dimensional weather radar image display device according to claim 1, wherein the display device includes means for displaying the inside of the boundary contour projected and displayed on the map with different gradations. A three-dimensional display device for weather radar images, characterized in that: