EP2942767B1 - Apparatus and method for warning aircraft - Google Patents
Apparatus and method for warning aircraft Download PDFInfo
- Publication number
- EP2942767B1 EP2942767B1 EP14001651.0A EP14001651A EP2942767B1 EP 2942767 B1 EP2942767 B1 EP 2942767B1 EP 14001651 A EP14001651 A EP 14001651A EP 2942767 B1 EP2942767 B1 EP 2942767B1
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- EP
- European Patent Office
- Prior art keywords
- aircraft
- obstacle
- information
- warning
- trajectory
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- 238000000034 method Methods 0.000 title claims description 12
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/04—Anti-collision systems
- G08G5/045—Navigation or guidance aids, e.g. determination of anti-collision manoeuvers
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G3/00—Traffic control systems for marine craft
- G08G3/02—Anti-collision systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/0004—Transmission of traffic-related information to or from an aircraft
- G08G5/0008—Transmission of traffic-related information to or from an aircraft with other aircraft
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/0017—Arrangements for implementing traffic-related aircraft activities, e.g. arrangements for generating, displaying, acquiring or managing traffic information
- G08G5/0021—Arrangements for implementing traffic-related aircraft activities, e.g. arrangements for generating, displaying, acquiring or managing traffic information located in the aircraft
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/0073—Surveillance aids
- G08G5/0086—Surveillance aids for monitoring terrain
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G7/00—Traffic control systems for simultaneous control of two or more different kinds of craft
- G08G7/02—Anti-collision systems
Definitions
- the invention relates generally to apparatus for, and methods of, warning aircraft of obstacles.
- US2012/0215436 A1 shows a device and method based on radar sensors for monitor- ing obstacles in the close environment of an aircraft moving at low speed and at low altitude, providing alerts based on the criticalitv to the aircrew.
- US2013/096814 A1 shows an on ground collision preventive device for a vehicle using multiple information sources including a database containing obstacle data.
- WO03071371A1 discloses a method and apparatus for indicating aircraft height relative to an obstruction in a terrain awareness warning system.
- tall ships can be a danger to aircraft, particularly in regions where there is significant offshore industry, such as oil and gas industry.
- Ships involved in industrial activity can have height dimensions which present danger to aircraft, due to the presence of cranes and other tall structures (such as parts of oil rigs) carried on such ships. Collisions between ships can be avoided, or least reduced, by use of commercial Automatic Identification Systems (AISs).
- AISs Automatic Identification Systems
- a ship carrying an AIS transponder emits a signal on a dedicated VHF channel, the signal containing information corresponding to the ship's position, speed, direction and identity.
- the AIS transponder also receives such signals from other ships. Trajectories of ships can therefore be compared and suitable action taken to avoid collisions.
- a first aspect of the present invention provides apparatus to be carried on-board of an aircraft for warning the aircraft of an obstacle on the earth's surface, the apparatus comprising a warning system arranged to:
- the invention provides the advantage that an obstacle may be assessed as a potential danger to aircraft using only information corresponding to the obstacle's position and identity; reception of information corresponding to the obstacle's height is not necessary since the obstacle's height is obtained from a database using the obstacle's identity. Since a warning signal is generated only if the aircraft's altitude is comparable to the obstacle's height, and not simply if the obstacle lies on the aircraft horizontal trajectory, the incidence of false alarms is reduced compared to prior art methods which only utilise the obstacle's position in order to decide whether the obstacle presents a danger to aircraft.
- the warning system is arranged to receive third information corresponding to the obstacle's speed and direction and to use the first and third information and the aircraft' horizontal trajectory to calculate whether the aircraft and the obstacle will coincide in horizontal position at a coincidence point, and to generate a warning signal if the aircraft and obstacle are calculated so to coincide and the difference between the height dimension of the obstacle and the altitude of the aircraft at the coincidence point is less than a pre-determined value.
- the warning system is arranged to derive the first and third information, from an Automatic Identification System (AIS) signal.
- AISs are commercially available and are used on ships to provide position, direction, speed and identity information primarily to other ships, but also to aircraft.
- a commercial AIS signal may be used without modification to warn aircraft of ships that may present danger due to their heights, without a high rate of false alarms, even though an AIS signal does not include any information about the height of ship.
- the apparatus comprises a position receiver arranged to receive AIS signals and to pass the AIS signals to the warning system.
- the storage means is comprised within the warning system.
- a second aspect of the invention provides a method of warning an aircraft of an obstacle on the earth's surface, the method performed on-board of the aircraft comprising the steps of:
- the method comprises the steps of receiving third information corresponding to the obstacle's speed and direction, and using the first and third information and the aircraft's horizontal trajectory to calculate whether the aircraft and the obstacle will coincide at a horizontal position at a coincidence point, and generating a warning signal if the aircraft and obstacle are calculated so to coincide at the coincidence point and the difference between the height dimension of the obstacle and the altitude of the aircraft at the coincidence point is less than a pre-determined value.
- the first and third information are derived from an AIS signal.
- FIG. 1 shows an apparatus of the invention indicated generally by 10 and comprising a ship position receiver 12, storage means 14 storing a database of ship identities and corresponding height data, and a warning system 16.
- the warning system 16 is a standard commercial collision warning system, for example a Helicopter Terrain Avoidance and Warning System (HTAWS).
- a ship 20 comprises a commercial Automatic Identification System (AIS) transponder (not shown), which emits an AIS signal 22 on a dedicated channel such as a VHF channel.
- the AIS signal 22 comprises information regarding the position, speed, direction and identity of the ship 22.
- the apparatus 10 is carried on an aircraft (not shown).
- the ship position receiver 12 receives the AIS signal 22 and passes a corresponding signal to the warning system 10.
- the warning system 16 also receives information corresponding to the altitude of the aircraft, and its horizontal position (e.g. latitude and longitude) as a function of time.
- an aircraft 50 fitted with the apparatus 10 of Figure 1 and having a horizontal trajectory 52 receives a respective AIS signal from each of ships 54, 56.
- the ship 54 does not lie on the horizontal trajectory 52 and therefore no warning signal is generated in respect of the ships 54.
- the ship 56 does lie on the horizontal trajectory 52.
- the warning system uses the identity of the ship 56 obtained from the AIS signal to look up the height dimension of the ship 56 using the database held in the storage means 14. The height dimension of the ship 56 is then compared to the altitude of the aircraft 50 and a warning is generated if the altitude of the aircraft 50 does not exceed the height dimension of the ship 56 by more than a pre-determined value.
- Figures 3 and 4 illustrate how a warning may be generated based on the trajectory of a ship in addition to its height.
- An aircraft 60 fitted with the apparatus 10 has a horizontal trajectory 62 and receives respective AIS signals from ships 64, 66.
- the warning system 16 of the apparatus is arranged to assess the trajectories of the ships 64, 66 using the respective AIS signal of each ship, and to compare the trajectories to the horizontal trajectory 62 of the aircraft 60.
- the warning system 10 is arranged to establish whether the horizontal trajectory 62 of the aircraft 60 intersects the trajectory of either ship 64, 66, and whether the aircraft 60 will intercept either ship 64, 66 based on their speeds and the speed of the aircraft 60.
- the trajectory and speed of ship 64 are such that the ship 64 and aircraft 60 will coincide.
- the warning system 16 of the apparatus 10 therefore generates a warning signal provided the altitude of the aircraft 62 does not exceed the height of the ship 64 by more than a pre-determined value. In such a case the aircraft 60 may make an avoiding manoeuvre 63 to avoid collision with the ship 64.
- the aircraft 60 and ship 66 will not coincide at a particular horizontal position (e.g. a particular latitude and longitude) and therefore no warning signal is generated in relation to the ship 66.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Ocean & Marine Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Traffic Control Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
- The invention relates generally to apparatus for, and methods of, warning aircraft of obstacles.
- It is known that tall objects having fixed positions on the earth's surface, such as wind turbines, present a serious danger to aircraft. It is known to provide an aircraft with a warning system which includes a database of the positions and heights of such objects so that a pilot may avoid them.
-
US2012/0215436 A1 shows a device and method based on radar sensors for monitor-ing obstacles in the close environment of an aircraft moving at low speed and at low altitude, providing alerts based on the criticalitv to the aircrew. -
US2013/096814 A1 shows an on ground collision preventive device for a vehicle using multiple information sources including a database containing obstacle data. -
WO03071371A1 - A similar problem arises with movable objects on the earth's surface. In particular tall ships can be a danger to aircraft, particularly in regions where there is significant offshore industry, such as oil and gas industry. Ships involved in industrial activity can have height dimensions which present danger to aircraft, due to the presence of cranes and other tall structures (such as parts of oil rigs) carried on such ships. Collisions between ships can be avoided, or least reduced, by use of commercial Automatic Identification Systems (AISs). A ship carrying an AIS transponder emits a signal on a dedicated VHF channel, the signal containing information corresponding to the ship's position, speed, direction and identity. The AIS transponder also receives such signals from other ships. Trajectories of ships can therefore be compared and suitable action taken to avoid collisions. It is also known for aircraft to receive AIS information from ships in order to prevent collisions between ships and aircraft. However, because commercial AIS signals contain no information about the height of a ship, comparing the trajectories of aircraft with those of ships using AIS information leads to a high false alarm rate because many ships will not have a height dimension that results in a danger to aircraft. It is also possible for very tall and movable objects on land to pose a danger to aircraft; currently no system exists to warn aircraft of such objects.
- A first aspect of the present invention provides apparatus to be carried on-board of an aircraft for warning the aircraft of an obstacle on the earth's surface, the apparatus comprising a warning system arranged to:
- (i) receive first information corresponding to the obstacle's identity and obstacle's position and second information corresponding to the aircraft's horizontal and vertical position as a function of time; and
- (ii) calculate an aircraft trajectory for the aircraft using the second information;
- (iii) the apparatus further comprises storage means storing a database of obstacle identities and corresponding height data;
- (iv) the warning system is arranged to retrieve a height dimension of the obstacle from the database using the obstacle's identity as derived from the first information, and
- (v) the warning system is arranged to generate a warning signal if the obstacle lies on or within a pre-determined vicinity the aircraft's horizontal trajectory and the difference between the height dimension of the obstacle and the altitude of the aircraft at the obstacle position of the aircraft trajectory is less than a pre-determined value,
- The invention provides the advantage that an obstacle may be assessed as a potential danger to aircraft using only information corresponding to the obstacle's position and identity; reception of information corresponding to the obstacle's height is not necessary since the obstacle's height is obtained from a database using the obstacle's identity. Since a warning signal is generated only if the aircraft's altitude is comparable to the obstacle's height, and not simply if the obstacle lies on the aircraft horizontal trajectory, the incidence of false alarms is reduced compared to prior art methods which only utilise the obstacle's position in order to decide whether the obstacle presents a danger to aircraft.
- According to the invention, the warning system is arranged to receive third information corresponding to the obstacle's speed and direction and to use the first and third information and the aircraft' horizontal trajectory to calculate whether the aircraft and the obstacle will coincide in horizontal position at a coincidence point, and to generate a warning signal if the aircraft and obstacle are calculated so to coincide and the difference between the height dimension of the obstacle and the altitude of the aircraft at the coincidence point is less than a pre-determined value. This provides for additional assessment of the obstacle as a danger to aircraft by assessing whether it will coincide with the aircraft in horizontal position.
- The warning system is arranged to derive the first and third information, from an Automatic Identification System (AIS) signal. AISs are commercially available and are used on ships to provide position, direction, speed and identity information primarily to other ships, but also to aircraft. In accordance with the invention, a commercial AIS signal may be used without modification to warn aircraft of ships that may present danger due to their heights, without a high rate of false alarms, even though an AIS signal does not include any information about the height of ship.
- According to the invention, the apparatus comprises a position receiver arranged to receive AIS signals and to pass the AIS signals to the warning system.
- Conveniently, the storage means is comprised within the warning system.
- A second aspect of the invention provides a method of warning an aircraft of an obstacle on the earth's surface, the method performed on-board of the aircraft comprising the steps of:
- (i) receiving first information corresponding to the obstacle's identity and obstacle's position and second information corresponding to the aircraft's horizontal and vertical position as a function of time; and
- (ii) calculating an aircraft trajectory for the aircraft using the second information;
- (iii) retrieving a height dimension of the obstacle from a database of obstacle identities and corresponding height data using the obstacle's identity as derived from the first information; and
- (iv) generating a warning signal if the obstacle lies on or within a pre-determined vicinity of the aircraft's horizontal trajectory and the difference between the height dimension of the obstacle and the altitude of the aircraft at the obstacle position of the aircraft trajectory is less than a pre-determined value.
- According to the invention, the method comprises the steps of receiving third information corresponding to the obstacle's speed and direction, and using the first and third information and the aircraft's horizontal trajectory to calculate whether the aircraft and the obstacle will coincide at a horizontal position at a coincidence point, and generating a warning signal if the aircraft and obstacle are calculated so to coincide at the coincidence point and the difference between the height dimension of the obstacle and the altitude of the aircraft at the coincidence point is less than a pre-determined value.
- According to the invention, the first and third information, are derived from an AIS signal.
- Embodiments of the invention are described below by way of example only and with reference to the accompanying drawings in which:
- Figure 1
- shows a block diagram of an apparatus of the invention;
- Figure 2
- illustrates generation of a warning signal based on the position and height of a ship; and
- Figures 3 & 4
- illustrate generation of a warning signal based on the trajectory and height of a ship.
-
Figure 1 shows an apparatus of the invention indicated generally by 10 and comprising aship position receiver 12, storage means 14 storing a database of ship identities and corresponding height data, and awarning system 16. Thewarning system 16 is a standard commercial collision warning system, for example a Helicopter Terrain Avoidance and Warning System (HTAWS). InFigure 1 , aship 20 comprises a commercial Automatic Identification System (AIS) transponder (not shown), which emits anAIS signal 22 on a dedicated channel such as a VHF channel. TheAIS signal 22 comprises information regarding the position, speed, direction and identity of theship 22. Theapparatus 10 is carried on an aircraft (not shown). Theship position receiver 12 receives theAIS signal 22 and passes a corresponding signal to thewarning system 10. Thewarning system 16 also receives information corresponding to the altitude of the aircraft, and its horizontal position (e.g. latitude and longitude) as a function of time. - Referring to
Figure 2 , anaircraft 50 fitted with theapparatus 10 ofFigure 1 and having ahorizontal trajectory 52 receives a respective AIS signal from each ofships ship 54 does not lie on thehorizontal trajectory 52 and therefore no warning signal is generated in respect of theships 54. However theship 56 does lie on thehorizontal trajectory 52. In this case the warning system uses the identity of theship 56 obtained from the AIS signal to look up the height dimension of theship 56 using the database held in the storage means 14. The height dimension of theship 56 is then compared to the altitude of theaircraft 50 and a warning is generated if the altitude of theaircraft 50 does not exceed the height dimension of theship 56 by more than a pre-determined value. -
Figures 3 and 4 illustrate how a warning may be generated based on the trajectory of a ship in addition to its height. Anaircraft 60 fitted with theapparatus 10 has ahorizontal trajectory 62 and receives respective AIS signals fromships warning system 16 of the apparatus is arranged to assess the trajectories of theships horizontal trajectory 62 of theaircraft 60. Thewarning system 10 is arranged to establish whether thehorizontal trajectory 62 of theaircraft 60 intersects the trajectory of eithership aircraft 60 will intercept eithership aircraft 60. - The trajectory and speed of
ship 64 are such that theship 64 andaircraft 60 will coincide. Thewarning system 16 of theapparatus 10 therefore generates a warning signal provided the altitude of theaircraft 62 does not exceed the height of theship 64 by more than a pre-determined value. In such a case theaircraft 60 may make an avoidingmanoeuvre 63 to avoid collision with theship 64. - Although the trajectory of the
ship 66 intersects the aircrafthorizontal trajectory 62, theaircraft 60 andship 66 will not coincide at a particular horizontal position (e.g. a particular latitude and longitude) and therefore no warning signal is generated in relation to theship 66.
Claims (3)
- Apparatus (10), to be carried on-board of an aircraft, for warning the aircraft of an obstacle on the earth's surface, the apparatus comprising a warning system (16) arranged to:(i) receive first information corresponding to the obstacle's position and second information corresponding to the aircraft's horizontal and vertical position as a function of time; and(ii) calculate an aircraft trajectory for the aircraft using the second information;(iii) the apparatus further comprises storage means (14) storing a database;(iv) generate a warning signal if the obstacle lies on or within a pre-determined vicinity the aircraft's horizontal trajectory and the difference between the height dimension of the obstacle and the altitude of the aircraft at the obstacle position of the aircraft trajectory is less than a pre-determined value;
characterised in that(v) the apparatus comprises a position receiver (12) arranged to receive the first information and pass it to the warning system, whereas the first information additionally comprises the obstacle's identity,(vi) whereas the warning system is arranged to derive the first information from an Automatic Identification System (AIS) signal,(vii) the database contains the obstacle identities and corresponding height data; and(viii) the warning system is arranged to retrieve a height dimension of the obstacle from the database using the obstacle's identity as derived from the first information, wherein the warning system is arranged to receive third information derived from the Automatic Identification System signal (AIS) corresponding to the obstacle's speed and direction and wherein the warning system is arranged to use the first and third information and the aircraft's horizontal trajectory to calculate whether the aircraft and the obstacle will coincide in horizontal position at a coincidence point, and to generate a warning signal only if the aircraft and obstacle are calculated so to coincide and the difference between the height dimension of the obstacle and the altitude of the aircraft at the coincidence point is less than a pre-determined value. - A system according to any preceding claim wherein the storage means is comprised within the warning system.
- A method of warning an aircraft of an obstacle on the earth's surface, the method performed on-board of the aircraft comprising the steps of:(i) receiving first information corresponding to the obstacle's position and second information corresponding to the aircraft's horizontal and vertical position as a function of time; and(ii) calculating an aircraft trajectory for the aircraft using the second information;(iii) generating a warning signal on-board of an aircraft if the obstacle lies on or with in a pre-determined vicinity of the aircraft's horizontal trajectory and the difference between the height dimension of the obstacle and the altitude of the aircraft at the obstacle position of the aircraft trajectory is less than a pre-determined value;characterised in that the method further comprises the steps of:(iv) receiving first information corresponding to the obstacle's identity by a position receiver, the first information being derived from an Automatic Identification System (AIS) signal;(v) retrieving a height dimension of the obstacle from a database of obstacle identities and corresponding height data using the obstacle's identity as derived from the first information, further comprising the steps of receiving third information derived from the Automatic Identification System (AIS) signal corresponding to the obstacle's speed and direction, and using the first and third information and the aircraft's horizontal trajectory to calculate whether the aircraft and the obstacle will coincide in horizontal position at a coincidence point, and generating a warning signal only if the aircraft and obstacle are calculated so to coincide at the coincidence point and the difference between the height dimension of the obstacle and the altitude of the aircraft at the coincidence point is less than a pre-determined value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP14001651.0A EP2942767B1 (en) | 2014-05-10 | 2014-05-10 | Apparatus and method for warning aircraft |
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EP14001651.0A EP2942767B1 (en) | 2014-05-10 | 2014-05-10 | Apparatus and method for warning aircraft |
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EP2942767A1 EP2942767A1 (en) | 2015-11-11 |
EP2942767B1 true EP2942767B1 (en) | 2022-06-22 |
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Families Citing this family (3)
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CN110299029A (en) * | 2019-06-25 | 2019-10-01 | 中山市聚云软件科技有限公司 | Ship's particulars detection system and method and bridge superelevation early warning system and method |
CN110500992B (en) * | 2019-08-06 | 2021-06-08 | 安徽省交通规划设计研究总院股份有限公司 | Bridge navigation clearance scale real-time monitoring and early warning system and method |
CN114894103B (en) * | 2022-03-30 | 2023-10-10 | 湖北国际物流机场有限公司 | Ultrahigh ship detection system based on laser technology and detection method thereof |
Citations (3)
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WO2003071371A1 (en) * | 2001-10-11 | 2003-08-28 | Sandel Avionics, Inc. | Method and apparatus for predictive altitude display |
JP3763004B1 (en) * | 2005-08-03 | 2006-04-05 | 国土交通省国土技術政策総合研究所長 | Ship monitoring system near aircraft entry and exit, and ship monitoring method near aircraft entry and exit |
KR101004126B1 (en) * | 2010-09-27 | 2010-12-27 | (주)에디넷 | 3-dimensional vessel traffic service system |
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FR2917222B1 (en) * | 2007-06-05 | 2009-10-30 | Thales Sa | COLLISION PREVENTION DEVICE AND METHOD FOR A GROUND VEHICLE |
WO2009090185A2 (en) * | 2008-01-18 | 2009-07-23 | Heinz Wipf | Method and system for preventing a movable object from entering a protected section |
FR2932279B1 (en) * | 2008-06-10 | 2011-08-19 | Thales Sa | DEVICE AND METHOD FOR MONITORING OBSTRUCTIONS IN THE ENVIRONMENT CLOSE TO AN AIRCRAFT. |
EP2506032B1 (en) * | 2008-06-18 | 2013-10-02 | Saab Ab | Validity check of vehicle position information |
EP2648174B1 (en) * | 2012-03-19 | 2018-05-02 | Hughey & Phillips, LLC | Lighting and collision alerting system |
DE102012110384B4 (en) * | 2012-10-30 | 2019-11-28 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | AIS monitoring system |
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- 2014-05-10 EP EP14001651.0A patent/EP2942767B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003071371A1 (en) * | 2001-10-11 | 2003-08-28 | Sandel Avionics, Inc. | Method and apparatus for predictive altitude display |
JP3763004B1 (en) * | 2005-08-03 | 2006-04-05 | 国土交通省国土技術政策総合研究所長 | Ship monitoring system near aircraft entry and exit, and ship monitoring method near aircraft entry and exit |
KR101004126B1 (en) * | 2010-09-27 | 2010-12-27 | (주)에디넷 | 3-dimensional vessel traffic service system |
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