JP6702598B2 - Track drawing device, track drawing method, and program - Google Patents

Description

The present invention relates to a track drawing device, a track drawing method for drawing a track of an aircraft on a screen, and a program for realizing these.

In recent years, at airline companies and airports, in order to allow a third party to confirm the flight status of the aircraft, attempts have been made to publish the track of the aircraft departing and arriving on the website (see Non-Patent Documents 1 and 2). .. In addition, usually, the track is drawn based on the aircraft position information output by the radar information processing system.

The radar information processing system used at the airport includes a terminal radar information processing system (ARTS: Automated Radar Terminal System) and an airway radar information processing system (RDP: Radar Data Processing System).

The former is a system that specifies the position of the aircraft every 4 seconds and outputs the aircraft position information every 4 seconds. On the other hand, the latter specifies the position of the aircraft every 10 seconds, but outputs the aircraft position information every 1 minute. In air traffic control, either system is used according to the application (see, for example, Patent Documents 1 and 2).

In addition, there is also known a system that intercepts a signal output by an ADS-B (Automatic Dependent Surveillance-Broadcast) mounted on an aircraft and draws a track based on the intercepted signal.

JP, 7-104057, A JP, 2014-2538, A

"Web Track 5", [online], BRUEL & KJAR, [Search on November 5, 2015], Internet <URL:http://webtrak5.bksv.com/> "STEUERZENTRALE FUR MESS- UND FLUGDATEN", [online], Frankfurt Airport, [November 5, 2015 search], Internet <URL:http://franom.fraport.de/franom.php> "Flightradar24", [online], 2015, Flightradar24 AB, [November 5, 2015 search], Internet <URL:http://www.flightradar24.com/33.91,135.67/6>

By the way, when the aircraft position information output by ARTS is used to create the track, the track can be drawn with high accuracy, but the amount of data output is very large. Therefore, when the aircraft position information output by ARTS is used, a system with high processing capability is required as a system for drawing a track, which causes a problem that the cost for constructing the system increases significantly.

On the other hand, when the aircraft position information output by RDP is used, the amount of data that is output is not so large that an increase in cost for building the system can be suppressed. However, the distance that the aircraft travels in one minute is large, and the position specified by the current aircraft position information and the position specified by the aircraft position information one minute before are greatly separated. Therefore, the aircraft position information output by RDP is When used, there is a problem that the accuracy of the track is low and the track tends to be unnatural.

When the signal output from the ADS-B mounted on the aircraft is used, the system needs a device for receiving the signal, and in this case also, the cost for constructing the system increases significantly. In addition, ADS-B is not installed in all aircraft, and there are cases where wakes cannot be created.

An example of an object of the present invention is to solve the above problems and reduce the cost for constructing a system for drawing a track of an aircraft, while improving the accuracy of a drawn track, a track drawing device, and a track drawing method. , And to provide a program.

In order to achieve the above object, a track drawing device according to one aspect of the present invention is a device for drawing a track of an aircraft flying over a set area,
An information acquisition unit that acquires aircraft position information that specifies a transit point of the aircraft and a transit time at which the aircraft passes through the transit point, and
Based on the aircraft position information, for each aircraft, specify the passing point of the aircraft, connect the specified passing point and the passing point with a virtual line along the time series, at that time, continuous When the three or more passing points are not on a straight line, a trail creating unit that creates the trail of the aircraft by arranging these passing points on a continuous virtual curve,
A track drawing unit for drawing a part or all of the created track on the screen,
Is provided.

In order to achieve the above object, the track drawing method according to one aspect of the present invention is a method for drawing a track of an aircraft flying over a set area,
(A) acquiring aircraft position information that specifies a passing point of the aircraft and a passing time at which the aircraft passes the passing point;
(B) On the basis of the aircraft position information, a passing point of the aircraft is specified for each aircraft, and the specified passing point and the passing point are connected by a virtual line along a time series, At this time, when three or more continuous passing points are not on a straight line, these passing points are positioned on a continuous virtual curve to create a track of the aircraft, and
(C) drawing a part or all of the created track on the screen,
It is characterized by having.

Further, in order to achieve the above object, a program according to one aspect of the present invention is a program for drawing a track of an aircraft flying over a set area by a computer,
On the computer,
(A) acquiring aircraft position information that specifies a passing point of the aircraft and a passing time at which the aircraft passes the passing point;
(B) On the basis of the aircraft position information, a passing point of the aircraft is specified for each aircraft, and the specified passing point and the passing point are connected by a virtual line along a time series, At this time, when three or more continuous passing points are not on a straight line, these passing points are positioned on a continuous virtual curve to create a track of the aircraft, and
(C) drawing a part or all of the created track on the screen,
Is executed.

As described above, according to the present invention, it is possible to improve the accuracy of the drawn track while reducing the cost required for constructing the system for drawing the track of the aircraft.

FIG. 1 is a block diagram showing a schematic configuration of a track drawing device according to an embodiment of the present invention. FIG. 2 is a block diagram specifically showing the configuration of the track drawing device in the embodiment of the present invention. FIG. 3 is a diagram showing an example of aircraft position information acquired in the embodiment of the present invention. FIG. 4 is a diagram showing an example of operation record information acquired in the embodiment of the present invention. FIG. 5 is a diagram showing an example of aircraft flight information acquired in the embodiment of the present invention. FIG. 6 is a diagram showing an example of a track creating process according to the embodiment of the present invention. FIG. 6A shows a case where a smoothing process is performed, and FIG. 6B is a case where a smoothing process is not performed. Shows the case. FIG. 7: is a figure which shows an example of the setting process of the virtual passing point on the runway in embodiment of this invention, FIG.7(a) shows the case where a virtual passing point is set, and FIG. ) Indicates the case where a virtual passing point is not set. FIG. 8 is a diagram showing an example of passing point deletion processing according to the embodiment of the present invention. FIG. 9 is a diagram showing an example of a track drawn by the track drawing apparatus in the embodiment of the present invention. FIG. 10 is a flowchart showing the operation of the track drawing device in the embodiment of the present invention. FIG. 11 is a block diagram showing an example of a computer that realizes the track drawing device in the embodiment of the present invention.

(Embodiment)
Hereinafter, a track drawing device, a track drawing method, and a program according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11.

[Device configuration]
First, the configuration of the track drawing device according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a schematic configuration of a track drawing device according to an embodiment of the present invention.

A track drawing device 100 according to the present embodiment shown in FIG. 1 is a device for drawing a track of an aircraft flying over a set area. Further, in the present embodiment, the “setting area” is an area in which a specific airport exists and is set in advance, and the wake drawing device 100 allows the aircraft drawing at the specific airport and the aircraft landing at the specific airport. Draw the wake of.

As shown in FIG. 1, the track drawing apparatus 100 includes an information acquisition unit 10, a track creation unit 20, and a track drawing unit 30. Among these, the information acquisition unit 10 acquires aircraft position information that specifies the passing point of the aircraft and the time when the aircraft passes the passing point.

The track creating unit 20 identifies a passing point of each aircraft for each aircraft based on the aircraft position information, connects the specified passing points with passing points by a virtual line in a time series, and To create. Further, at that time, when the three or more continuous passing points are not on a straight line, the track creating unit 20 positions these passing points on a continuous virtual curve. The track drawing unit 30 draws a part or all of the created track on the screen.

In this way, the track drawing device 100 draws a curve as a track when the passing points are not aligned on a straight line. Therefore, even if the passing points are acquired every minute, the wake becomes natural along with the actual flight of the aircraft. Therefore, according to the track drawing device 100, it is possible to improve the accuracy of the drawn track while reducing the cost for constructing the system for drawing the track of the aircraft.

Here, the configuration of the track drawing apparatus 100 according to the present embodiment will be described more specifically with reference to FIGS. 2 to 9. FIG. 2 is a block diagram specifically showing the configuration of the track drawing device in the embodiment of the present invention.

As shown in FIG. 2, in the present embodiment, the information acquisition unit 10 acquires operation record information and aircraft flight information in addition to aircraft position information. Of these, the flight performance information is information that specifies at least the runway used by the aircraft at the airport existing in the set area. In addition, the aircraft flight information is information that specifies at least the takeoff date and time or the landing date and time of the aircraft at the airport.

Further, in the present embodiment, the aircraft position information, the flight performance information, and the aircraft flight information are past data accumulated in the existing system and are acquired from the existing system. In the present embodiment, the track drawing device 100 draws a track of a past aircraft.

Specific examples of aircraft position information, flight performance information, and aircraft flight information are shown in FIGS. FIG. 3 is a diagram showing an example of aircraft position information acquired in the embodiment of the present invention. In the example of FIG. 3, the aircraft position information specifies the passing point of the aircraft every minute by latitude and longitude, and also specifies the altitude of the passing point. Further, in FIG. 3, “JSW number” is a number that uniquely identifies an aircraft.

FIG. 4 is a diagram showing an example of operation record information acquired in the embodiment of the present invention. In the example of FIG. 4, the flight record information specifies the runway used by the aircraft by the runway identifier. FIG. 5 is a diagram showing an example of aircraft flight information acquired in the embodiment of the present invention. In the example of FIG. 5, the aircraft flight information identifies the takeoff date and the landing date and time at the airport of the aircraft by the departure airport abbreviation, the takeoff date and time, the arrival airport abbreviation, and the arrival date and time. Further, in the examples of FIGS. 4 and 5, the flight record information and the aircraft flight information are linked to each other based on the flight number and the arrival date and time (ATA) or the takeoff date and time (ATD).

Further, as shown in FIG. 2, the information acquisition unit 10 further acquires noise information. The noise information is information transmitted from a noise measuring station installed in the set area, and is information that specifies a noise measurement value and a measurement time.

In the present embodiment, for example, as shown in FIG. 6, the track creating unit 20 connects the passing points specified from the aircraft position information with a spline curve in a time series to connect the passing points. To create. FIG. 6 is a diagram showing an example of a track creating process according to the embodiment of the present invention. FIG. 6A shows a case where a smoothing process is performed, and FIG. 6B is a case where a smoothing process is not performed. Shows the case.

As shown in FIG. 6A, the track creating unit 20 first specifies the coordinates (latitude and longitude) of the passing points 50a to 50e for each aircraft (flight) based on the aircraft position information. Next, as shown in FIG. 6(a), the track creating unit 20 uses, for example, Catmull-
Perform smoothing processing by Rom etc. so that the specified coordinates are connected by a smooth virtual curve. As a result, the track 51 composed of smooth curves is created.

As described above, in the present embodiment, the aircraft position information represents the passing point of the aircraft every one minute, and is acquired from the airway radar information processing system (RDF). Therefore, since the speed of the aircraft is very high and the distance that the aircraft travels per minute is long, if the passing points are connected by a virtual straight line as shown in FIG. It will be formed, and the shape of the wake will be far from the wake of the actual aircraft. On the other hand, as shown in FIG. 6A, in the present embodiment, the smoothing process is performed as shown in the lower side of FIG. 2, so that the shape of the track is similar to that of an actual aircraft. The shape will be close.

In addition, in the present embodiment, the track creating unit 20 identifies the departure point or the end point of the aircraft based on the flight record information and the aircraft flight information. Specifically, the track creating unit 20 determines whether the specific airport in the set area corresponds to either the departure airport (abbreviation) or the arrival airport (abbreviation) included in the aircraft flight information.

When the result of the determination is that the aircraft corresponds to the arrival airport, the wake preparation unit 20 determines that the aircraft will land at a specific airport and sets the end point of the runway identified by the runway identifier of the flight record information as the end point. Set. On the other hand, when it is determined that the departure airport is applicable, the track creation unit 20 determines that the aircraft will take off from the specific airport and departs from the start point of the runway identified by the runway identifier of the flight record information. Set as a point.

When the starting point is specified, the track creating unit 20 creates a track with the starting point as the starting point, and when the ending point is specified, creates the track with the ending point as the ending point. In this embodiment, the end point and the start point of the runway are set in advance by the longitude and the latitude for each runway.

The track creating unit 20 can also improve the accuracy of the track by setting a virtual passing point 52 on the runway. This point will be described with reference to FIG. 7. FIG. 7: is a figure which shows an example of the setting process of the virtual passing point on the runway in embodiment of this invention, FIG.7(a) shows the case where a virtual passing point is set, and FIG. ) Indicates the case where a virtual passing point is not set.

As shown in FIG. 7A, when the runway creating unit 20 identifies the runway 52 used by the aircraft based on the flight record information, the track creating unit 20 sets a virtual passing point 53 on the identified runway 52. In this case, the track creating unit 20 creates the track 51 of the aircraft so as to pass through the set virtual passing point 53 in addition to the passing point 50 specified from the aircraft position information.

On the other hand, as shown in FIG. 7B, if a track is created only with the passing points 50 specified from the aircraft position information, there is a possibility that the track will not pass on the runway. In this case, it violates the principle that "the aircraft goes straight on the runway at the time of takeoff and landing", and the accuracy of the track decreases.

Further, in the present embodiment, when the lane creating unit 20 connects the passing points with the imaginary straight line in a time series, when the imaginary straight line connects any of the passing points to the apex. When an acute angle is formed, the passing point (hereinafter referred to as “protruding point”) that is the apex of the acute angle can be removed to create an aircraft track. FIG. 8 is a diagram showing an example of passing point deletion processing according to the embodiment of the present invention.

In the example of FIG. 8, when the passing points are sequentially connected in time series by a virtual straight line 54, the straight line 54 connecting the passing points 50b and 50c and the passing points 50c and 50d are connected. The straight line 54 forms an acute angle with the passing point 50c as the apex. In this case, the wake obtained will not be obtained on an actual aircraft. Therefore, the track creating unit 20 creates the track 51 having a natural shape by removing the passing point 50c that is the apex of the acute angle.

In the present embodiment, the track drawing unit 30 draws a part or all of the created track on the website in a superimposed manner on the map of the set area. As a result, a part or all of the track is drawn on the screen of the terminal device 200 connected to the track drawing apparatus 10 via the network 40.

Here, a specific example of the drawn track will be described. FIG. 9 is a diagram showing an example of a track drawn by the track drawing apparatus in the embodiment of the present invention. In the example of FIG. 9, a track is represented by an object 60 representing an aircraft. A broken line 61 is attached to the rear of the object 60 for easy understanding of the track.

Specifically, the track drawing unit 30 draws the object 60 on the track created by the track creating unit 20. Further, the track drawing unit 30 moves the object 60 on the track in a time series based on the passing time of each passing point. In the present embodiment, by moving the object 60, a part or the whole of the track is drawn on the screen. Further, the track drawing unit 30 also draws the flight number based on the aircraft flight information. In addition, 62 has shown the airport and 63 has shown the noise measurement station.

Further, as shown in FIG. 9, the track drawing unit 30 also draws the altitude of the aircraft in time series on the screen based on the aircraft position information in addition to the track. By the way, since an aircraft usually gradually raises or lowers its altitude around an airport, the rate of ascent and the rate of descent are each within the set range. Therefore, when the altitude value to be drawn suddenly becomes too high or too low, the track drawing unit 30 determines that the aircraft position information has an error and corrects the altitude value. To do.

Specifically, the track drawing unit 30 corrects the drawing target altitude value so that the setting condition is satisfied when the drawing target altitude value does not satisfy the setting condition. Further, as a specific example of the case where the setting condition is not satisfied, for example, there is a case where the altitude value is greatly deviated from the previous and next values so that the ascending rate and the descending rate of the aircraft exceed the set range. Can be mentioned. Then, when the altitude value to be drawn is corrected, the track drawing unit 30 draws the corrected value on the screen.

In addition, in the example of FIG. 9, the track drawing unit 30 also draws the measured value of the noise measured by the noise measuring station 63 on the screen based on the noise information. By the way, a transmission delay may occur when the airway radar information processing system transmits aircraft position information. When such a transmission delay occurs, the noise level of the aircraft rises before approaching the noise measurement station, or the noise level rises after the aircraft has passed over the noise measurement station, resulting in an unnatural state. Occurs.

Therefore, in the present embodiment, the track creating unit 20 compares the position of the passing point of the aircraft and its passing time with the preset position, measured value, and measuring time of the noise measuring station 63, The passing time at the passing point is corrected according to the comparison result. That is, the track creation unit 20 corrects the passage time so as to be advanced by the amount of the transmission delay so that the above-mentioned unnatural state does not occur. Then, the track drawing unit 30 moves the object in time series based on the corrected passing time, and further draws the measured value of noise based on the measuring time specified by the noise information. This eliminates the occurrence of the above-mentioned unnatural state.

[Device operation]
Next, the operation of the track drawing device 100 according to the embodiment of the present invention will be described with reference to FIG. FIG. 10 is a flowchart showing the operation of the track drawing device in the embodiment of the present invention. In the following description, FIGS. 1 to 9 will be referred to as appropriate. In the present embodiment, the track drawing method is implemented by operating the track drawing device. Therefore, the description of the track drawing method in the present embodiment will be replaced by the following description of the operation of the track drawing apparatus 100.

As shown in FIG. 1, first, in the track drawing apparatus 100, the information acquisition unit 10 acquires aircraft position information, flight record information, aircraft flight information, and noise information (step A1). As described above, the aircraft position information, the flight performance information, and the aircraft flight information are past data accumulated in the existing system and are acquired from the existing system.

Next, the track creation unit 20 specifies the starting point or the ending point of each aircraft based on the flight record information and the aircraft flight information, and sets the starting point or the ending point of the track (step A2). ).

Next, the track creating unit 20 sets a virtual passing point 53 on the runway 52 specified by the flight performance information for each aircraft (step A3).

Next, the track creating unit 20 creates a virtual line that becomes a track by connecting, for each aircraft, a passage point identified from the aircraft position information with a spline curve in a time series. (Step A4). Further, in step A4, the track creating unit 20 also executes the process of deleting the protruding points, if necessary.

Next, the track drawing unit 30 draws a part or all of the track created in step A4 for each aircraft on the website (step A5). Specifically, as shown in FIG. 9, the track drawing unit 30 draws the object 60 on the track for each aircraft, and further moves the drawn object in time series on the track.

As described above, according to the track drawing device 100 in the present embodiment, it is possible to create a highly accurate track from the position information that specifies the coordinates of the aircraft every minute. Therefore, it is possible to improve the accuracy of the track while reducing the system cost.

Further, in the above-mentioned example, past data is used as the aircraft position information, flight record information, aircraft flight information, and noise information, but in the present embodiment, these information are real-time information. Is also good. Even if the aircraft position information, flight record information, aircraft flight information, and noise information are real-time information, the track drawing apparatus 100 can create a track for each aircraft and draw it.

[program]
The program in the present embodiment may be any program that causes a computer to execute steps A1 to A5 shown in FIG. By installing and executing this program on a computer, the track drawing apparatus 100 and the track drawing method according to the present embodiment can be realized. In this case, the CPU (Central Processing Unit) of the computer functions as the information acquisition unit 10, the track creation unit 20, and the track drawing unit 30 to perform processing.

Further, the program according to the present embodiment may be executed by a computer system constructed by a plurality of computers. In this case, for example, one of the computers may function as the information acquisition unit 10 and the track creation unit 20, and another computer may function as the track drawing unit 30.

Here, a computer that realizes the track drawing device 100 by executing the program according to the present embodiment will be described with reference to FIG. 11. FIG. 11 is a block diagram showing an example of a computer that realizes the track drawing device in the embodiment of the present invention.

As shown in FIG. 11, the computer 110 includes a CPU 111, a main memory 112, a storage device 113, an input interface 114, a display controller 115, a data reader/writer 116, and a communication interface 117. These units are connected to each other via a bus 121 so that they can communicate with each other.

The CPU 111 expands the program (code) according to the present embodiment stored in the storage device 113 into the main memory 112, and executes these in a predetermined order to perform various calculations. The main memory 112 is typically a volatile storage device such as a DRAM (Dynamic Random Access Memory). Further, the program in the present embodiment is provided in a state of being stored in computer-readable recording medium 120. The program according to the present embodiment may be distributed on the Internet connected via the communication interface 117.

Further, as a specific example of the storage device 113, a semiconductor storage device such as a flash memory can be cited in addition to a hard disk drive. The input interface 114 mediates data transmission between the CPU 111 and an input device 118 such as a keyboard and a mouse. The display controller 115 is connected to the display device 119 and controls the display on the display device 119.

The data reader/writer 116 mediates data transmission between the CPU 111 and the recording medium 120, reads a program from the recording medium 120, and writes the processing result in the computer 110 to the recording medium 120. The communication interface 117 mediates data transmission between the CPU 111 and another computer.

Further, as a specific example of the recording medium 120, a general-purpose semiconductor storage device such as CF (Compact Flash (registered trademark)) and SD (Secure Digital), a magnetic storage medium such as a flexible disk, or a CD- An optical storage medium such as a ROM (Compact Disk Read Only Memory) can be used.

As described above, according to the present invention, it is possible to improve the accuracy of the drawn track while reducing the cost required for constructing the system for drawing the track of the aircraft. INDUSTRIAL APPLICABILITY The present invention is useful in a field in which drawing of an aircraft track is required.

10 information acquisition unit 20 wake creation unit 30 wake drawing unit 40 network 50, 50a to 50e passing point 51 wake 52 runway 53 virtual passing point 54 virtual straight line 60 object representing an aircraft 61 dashed line connected to an object 62 airport 63 Noise measurement station 100 Track drawing device 110 Computer 111 CPU
112 Main Memory 113 Storage Device 114 Input Interface 115 Display Controller 116 Data Reader/Writer 117 Communication Interface 118 Input Equipment 119 Display Device 120 Recording Medium 121 Bus 200 Terminal Device

Claims (18)

A device for drawing a track of an aircraft flying over a set area,
Aircraft position information that identifies the transit point of the aircraft and the transit time when the aircraft passes the transit point, operation record information that identifies at least the runway used by the aircraft at the airport existing in the setting area, and the aircraft An information acquisition unit that acquires aircraft flight information that specifies at least takeoff date or landing date and time at the airport , and
Based on the aircraft position information, for each aircraft, specify the passing point of the aircraft, connect the specified passing point and the passing point with a virtual line along the time series, at that time, continuous When the three or more passing points are not on a straight line, a trail creating unit that creates the trail of the aircraft by arranging these passing points on a continuous virtual curve,
A track drawing unit for drawing a part or all of the created track on the screen,
Equipped with
The track creation unit determines whether the airport is a departure airport or an arrival airport based on the aircraft flight information, and based on the determination result and the flight record information, the departure point or the end point of the aircraft. Specifying a point, further, based on the operation record information, the runway used by the aircraft is specified, a virtual passing point is set on the specified runway,
When the starting point is specified, the starting point is set as the starting point, and the track is created so as to pass through the set virtual passing point,
When the end point is specified, the track is created so that the end point is the end point and the set virtual passing point is passed.
A track-drawing device characterized in that The track creating section creates the track by connecting the specified passing point and the passing point with a spline curve.
The track drawing apparatus according to claim 1. The track drawing unit draws an object on the track, and further, based on the passing time of each of the passing points, moves the object in a time series, thereby partially or entirely of the track. Draw on the screen,
Track writing apparatus according to claim 1 or 2. The information acquisition unit, further, from the noise measurement station installed in the setting area, to acquire the noise information that specifies the measurement value of the noise and the measurement time,
The track creating unit compares the position of the passing point and the passing time thereof, the position of the noise measurement station set in advance, the measurement value, and the measurement time, and depending on the result of the comparison, Correct the passing time at the passing point,
The track drawing unit moves the object along a time series based on the corrected passing time for each of the passing points, and further based on the measurement time included in the noise information, in time series. Draw the measured value on the screen along,
The track drawing device according to claim 3 . When the track creating unit connects the specified passing point and the passing point with a virtual straight line along a time series, the virtual straight line causes an acute angle with any passing point as an apex. when it is formed, by removing a passing point became apex of the acute angle, creating a wake of the aircraft, track writing apparatus according to any one of claims 1-4. The information acquisition unit acquires, as the aircraft position information, information that further specifies the altitude of the aircraft in addition to the passing point and the time,
The track drawing unit draws the altitude of the aircraft on the screen along a time series in addition to the track based on the aircraft position information, and at that time, the value of the altitude to be drawn satisfies the setting condition. If not satisfied, the corrected altitude value be drawn, draw values after correction on the screen, track writing apparatus according to any one of claims 1-5. A method for drawing a track of an aircraft flying over a set area, comprising:
(A) Aircraft position information that identifies a passing point of the aircraft and a passing time when the aircraft passes through the passing point, flight performance information that identifies at least a runway used by the aircraft at an airport existing in the setting area, And acquiring aircraft flight information that identifies at least the take-off date or landing date of the aircraft at the airport , and
(B) On the basis of the aircraft position information, a passing point of the aircraft is specified for each aircraft, and the specified passing point and the passing point are connected by a virtual line along a time series, At this time, when three or more continuous passing points are not on a straight line, these passing points are positioned on a continuous virtual curve to create a track of the aircraft, and
(C) drawing a part or all of the created track on the screen,
Have a,
In the step (b), whether the airport is a departure airport or an arrival airport is determined based on the aircraft flight information, and the departure point of the aircraft is determined based on the determination result and the flight record information. Or, to specify the end point, further, based on the flight performance information, to identify the runway used by the aircraft, set a virtual passing point on the identified runway,
When the starting point is specified, the starting point is set as the starting point, and the track is created so as to pass through the set virtual passing point,
When the end point is specified, the track is created so that the end point is the end point and the set virtual passing point is passed.
A method for drawing a wake characterized by the following. In the step (b), the track is created by connecting the specified passing point and the passing point with a spline curve.
The track drawing method according to claim 7 . In the step (c), an object is drawn on the track, and further, the object is moved in a time series based on the passing time at each of the passing points, whereby a part of the track or Draw everything on the screen,
The track drawing method according to claim 7 . In the step (a), further, noise information specifying a noise measurement value and a measurement time is acquired from a noise measuring station installed in the setting area,
In the step (b), the position of the passing point and the passing time thereof are compared with the preset position of the noise measuring station, the measured value, and the measuring time, and the result of the comparison is determined. Correct the passing time at the passing point,
In the step (c), the object is moved in a time series based on the corrected passing time for each of the passing points, and further, based on the measurement time included in the noise information, Draw the measured value on the screen along a series,
The track drawing method according to claim 9 . In the step (b), when the specified passing point and the passing point are connected by a virtual straight line in a time series, one of the passing points is made an apex by the virtual straight line. When an acute angle is formed, the passing point that is the apex of the acute angle is removed to create a track of the aircraft,
The track drawing method according to claim 7 . In the step (a), as the aircraft position information, in addition to the passing point and the time, information that further specifies the altitude of the aircraft is acquired,
In the step (c), based on the aircraft position information, in addition to the track, the altitude of the aircraft is drawn on the screen in chronological order, and at this time, the value of the altitude to be drawn is set. 12. The track drawing method according to claim 7 , wherein when the condition is not satisfied, the altitude value to be drawn is corrected and the corrected value is drawn on the screen. A program for drawing a track of an aircraft flying over a set area by a computer,
On the computer,
(A) Aircraft position information that identifies a passing point of the aircraft and a passing time when the aircraft passes through the passing point, flight performance information that identifies at least a runway used by the aircraft at an airport existing in the setting area, And acquiring aircraft flight information that identifies at least the take-off date or landing date of the aircraft at the airport , and
(B) On the basis of the aircraft position information, a passing point of the aircraft is specified for each aircraft, and the specified passing point and the passing point are connected by a virtual line along a time series, At this time, when three or more continuous passing points are not on a straight line, these passing points are positioned on a continuous virtual curve to create a track of the aircraft, and
(C) drawing a part or all of the created track on the screen,
Was executed,
In the step (b), whether the airport is a departure airport or an arrival airport is determined based on the aircraft flight information, and the departure point of the aircraft is determined based on the determination result and the flight record information. Or, to specify the end point, further, based on the flight performance information, to identify the runway used by the aircraft, set a virtual passing point on the identified runway,
When the starting point is specified, the starting point is set as the starting point, and the track is created so as to pass through the set virtual passing point,
When the end point is specified, the track is created so that the end point is the end point and the set virtual passing point is passed.
program. In the step (b), the track is created by connecting the specified passing point and the passing point with a spline curve.
The program according to claim 13 . In the step (c), an object is drawn on the track, and further, the object is moved in a time series based on the passing time at each of the passing points, whereby a part of the track or Draw everything on the screen,
The program according to claim 13 or 14 . In the step (a), further, noise information specifying a noise measurement value and a measurement time is acquired from a noise measuring station installed in the setting area,
In the step (b), the position of the passing point and the passing time thereof are compared with the preset position of the noise measuring station, the measured value, and the measuring time, and the result of the comparison is determined. Correct the passing time at the passing point,
In the step (c), the object is moved in a time series based on the corrected passing time for each of the passing points, and further, based on the measurement time included in the noise information, Draw the measured value on the screen along a series,
The program according to claim 15 . In the step (b), when the specified passing point and the passing point are connected by a virtual straight line in a time series, one of the passing points is made an apex by the virtual straight line. When an acute angle is formed, the passing point that is the apex of the acute angle is removed to create a track of the aircraft,
The program according to any one of claims 13 to 16 . In the step (a), as the aircraft position information, in addition to the passing point and the time, information that further specifies the altitude of the aircraft is acquired,
In the step (c), based on the aircraft position information, in addition to the track, the altitude of the aircraft is drawn on the screen in chronological order, and at this time, the value of the altitude to be drawn is set. The program according to claim 13 , wherein when the condition is not satisfied, the altitude value to be drawn is corrected and the corrected value is drawn on the screen.

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