CA2320754A1 - Method for representing radar images of an area of action under surveillance - Google Patents
Method for representing radar images of an area of action under surveillance Download PDFInfo
- Publication number
- CA2320754A1 CA2320754A1 CA002320754A CA2320754A CA2320754A1 CA 2320754 A1 CA2320754 A1 CA 2320754A1 CA 002320754 A CA002320754 A CA 002320754A CA 2320754 A CA2320754 A CA 2320754A CA 2320754 A1 CA2320754 A1 CA 2320754A1
- Authority
- CA
- Canada
- Prior art keywords
- image
- radar
- action region
- optical image
- targets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
- G01S13/917—Radar or analogous systems specially adapted for specific applications for traffic control for marine craft or other waterborne vessels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/04—Display arrangements
- G01S7/06—Cathode-ray tube displays or other two dimensional or three-dimensional displays
- G01S7/062—Cathode-ray tube displays or other two dimensional or three-dimensional displays in which different colours are used
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
According to the invention a stationary radar system covering an area of action to be placed under surveillance, such as an airport, seaport or river port, generates radar images. Onto each radar image of the area of action under surveillance which is generated by means of the radar system an optical image (aerial image) of the same area of action is superimposed by means of a data processing system. The combination image of the area of action obtained by this superimposition is transmitted to an observation and surveillance platform of a tower and from there to receiving monitors of moving targets in the area of action and represented on same. From the plurality of moving targets of a combination image the current position of, and possibly also a part of the path already travelled by, a moving target can be shown (by afterglow) on its receiving monitor by means of a differential GPS receiving unit which is assigned to said moving target and with which it can connect.
Description
DESCRIPTION
METHOD FOR DISPLAYING RADAR IMAGES OF AN ACTION REGION TO BE
MONITORED
TECHNICAL FIELD
The invention relates to a method for displaying radar images of an action region to be monitored, such as an airport, a seaport or a river harbor, or a similar action region.
to PRIOR ART
Generally, for monitoring such action regions, a radar system having a downstream data-processing system is used. If a stationary radar system having a rotating antenna, for example the tower of an airport or a corresponding building in a seaport, detects a building, for example, a strung backscatter signal is obtained and displayed on monitors of the radar system.
This display essentially corresponds to a sort of perspective, frontal view of buildings, but includes no notable structures and comprises a plurality of strong, point-shaped backscatter signals. Edges and other prominent, strongly-zo reflective points of a detected building appear especially distinct in the display.
Even a high-resolution radar image does not produce a continuous image that is comparable to a graphic, visual representation of the building that can be obtained with, for example, a camera. Moreover, a radar image is always in black and white.
OBJECT OF THE INVENTION
It is therefore the object of the invention to improve a display obtained with a radar system in that mobile, that is, moving and/or standing ("parked"), targets that are present in a certain action region are far easier to interpret or identity.
According to the invention, this object is accomplished by methods for displaying radar images of an action region to be monitored, such as an airport, a 0 seaport, a river harbor or similar action region, the methods having the features of claim 1 or 2. Advantageous modifications are the subject of the claims that are directly or indirectly dependent on claim 1 or 2.
In a first embodiment of the methods of the invention, with the aid of a data-processing system, an optical image, or a representation that approximates a cartographic representation (referred to hereinafter as map representation or aerial image), of the action region to be monitored is superposed over radar images of an instantaneous status of the action region, the images having been generated by a radar system, and a combination image obtained through the superposing of a radar image and the optics! image (aerial image) is then 2o displayed on a monitor.
In connection with realizing the methods of the invention, a radar system having an antenna that is fixed to a building, preferably the tower of an airport, a seaport or a river harbor, is advantageous; such arrangements are known from DE 40 07 611 C2 or 40 07 612 C2.
An optical image refers to a continuous image of the action region to be monitored, the image corresponding to a photographic representation. A
continuous image is an image that is generated to display only the stationary structures that are necessary for the monitoring and management of air or maritime traffic, such as buildings and ground facilities or docks, including the entire flying field/taxiway or the entire harbor. The image does not, however, include any mobile targets that change their position, such as aircraft, ships, tugboats, boarding vehicles, tankers, passenger buses, luggage carts, etc., or any temporarily "parked" (immobile, moored) objects. In other words, in the continuous image or aerial image of an action region to be monitored, such as an airport, a seaport or a river harbor, the flying field/taxiway or the actual harbor region, appears completely empty.
~ According,to a second preferred embodiment of the methods of the invention, the combination image of an action region that has been obtained through the superposing process is displayed on an observation or monitoring platform of a tower of airports, seaports or river harbors; tram there, it is transmitted to receiving monitors of mobile targets in the action region, and o displayed on them. Thus, a connection can be made from the tower to any mobile target carrying personnel, which are typically already provided with the corresponding receiving devices necessary for communication, in order to transmit appropriate information or instructions, possibly also with respect to mobile targets located in the immediate vicinity.
Furthermore, according to a preferred modification of a second embodiment of the methods according to the invention, a device that receives and processes signals of a differential GPS (Global Positioning System), and is respectively associated with a specific mobile target and can be activated by the target, can determine the target's instantaneous position from the plurality of mobile targets displayed on a transmitted. combination image, and possibly highlights at least a portion of the path that this mobile target has traversed (e.g., 1 o with an afterglow) on its receiving monitor, preferably also with color marking. 1f mobile targets detected by the radar system are displayed in color, the mobile target detected by the differential GPS is characterized by a particularly prominent color marking.
If, as is typically the case for most larger airports, seaports or river harbors, a device that processes GPS signals is provided, the method of the invention creates a highly-precise observation and monitoring system for such airports, seaports or river harbors. The linking of the device that processes GPS
signals in a tower and the device that processes differential GPS signals in the mobile targets, and the linking of receiving and display devices that are also 2o generally provided in mobile targets, such as monitors, a display, etc., presents the personnel of mobile targets, such as pilots, captains, navigators and general vehicle operators, not only with precise position information about their own vehicle, but also with comprehensive information about vehicles Located in the immediate and remote surroundings, and their anticipated directions of movement.
In addition, according to the invention, enlarging specific action region sectors of interest, such as through zooming, offers personnel on mobile targets a far better overview, particularly of the immediate vicinity.
According to a further advantageous modification of the invention, an optical image/aerial image of the action region to be monitored, which is to be sup~rposed over the radar image, is stored in the data-processing system. This 1 o type of stored image can then be layered as the background beneath a radar image, which is adapted in its dimensions to the stored image.
Upon the availability of a combination image formed from a radar image and an optical image superposed over the radar image, or an optical image layered as the background beneath the radar image, points, edges, etc., that z s originate from stationary, immobile targets such as buildings or other stationary installations, and can be clearly distinguished on the radar image by persons monitoring the action region detected by the radar, can be interpreted more easily as such, identified precisely with respect to their position, and therefore uniquely associated immediately with any fixed, immobile target.
20 In an advantageous modification of the method of the invention, the optical image is stored in color in the data-processing system, and is therefore ready for retrieval. If such a color optical image is layered as the background beneath a radar image, which has been correspondingly adapted in its dimensions, and can only be displayed in black and white, as stipulated by the system, this further improves the interpretation of the obtained combination image and the association and identification of prominent points, edges, etc., that are particularly emphasized on the radar image.
According to a further advantageous embodiment of the method according to the invention, all of the back-scattered points of stationary elements or targets of a scene that are likewise present in the optical images can be gated out of the radar image, which is preferably superposed over a continuous optical image, or a corresponding color map representation as the background, so only the back-scattered points of targets that are not present in the optical imagelmap representation are represented in the sublayered optical image/map representation.
In this way, it is possible not only to detect incorrectly-parked objects, for example, but also objects such as containers or the like that are parked temporarily, and are known to be halted for preparations for immediate transport, but also to make the monitoring personnel particularly aware of these objects..
In an especially advantageous manner, a combination image generated in accordance with the invention can be used not only to correctly interpret mobile 2 o targets, from smaller vehicles, transport vehicles, luggage carts or the like, up to large vehicles, such as aircraft or ships, but to identify the precise position or the path that has just been traversed by a mobile target.
Furthermore, according to another advantageous embodiment of the invention, al( targets that have been deteoted by the radar system and are not present in the optical image, including standing ("parked") and mobile targets, can be highlighted, for example by the assignment of a color to the targets that remain after al) stationary targets of a scene have been gated out, the targets not being present in the optics( image. In an advantageous modification of the invention, a different color can be assigned to the detected mobile targets from the one assigned to temporarily-parked, standing targets.
Parked and mobile targets that are not present in different sections of the optical image, but have been detected by the radar system, can be represented in different colors.
The method of the invention therefore creates numerous options for considerably facilitating and improving the interpretation of a radar image, not only with respect to mobile targets, but objects or targets that are only present temporarily ("parked"), and for identifying such objects or targets faster and more reliably.
METHOD FOR DISPLAYING RADAR IMAGES OF AN ACTION REGION TO BE
MONITORED
TECHNICAL FIELD
The invention relates to a method for displaying radar images of an action region to be monitored, such as an airport, a seaport or a river harbor, or a similar action region.
to PRIOR ART
Generally, for monitoring such action regions, a radar system having a downstream data-processing system is used. If a stationary radar system having a rotating antenna, for example the tower of an airport or a corresponding building in a seaport, detects a building, for example, a strung backscatter signal is obtained and displayed on monitors of the radar system.
This display essentially corresponds to a sort of perspective, frontal view of buildings, but includes no notable structures and comprises a plurality of strong, point-shaped backscatter signals. Edges and other prominent, strongly-zo reflective points of a detected building appear especially distinct in the display.
Even a high-resolution radar image does not produce a continuous image that is comparable to a graphic, visual representation of the building that can be obtained with, for example, a camera. Moreover, a radar image is always in black and white.
OBJECT OF THE INVENTION
It is therefore the object of the invention to improve a display obtained with a radar system in that mobile, that is, moving and/or standing ("parked"), targets that are present in a certain action region are far easier to interpret or identity.
According to the invention, this object is accomplished by methods for displaying radar images of an action region to be monitored, such as an airport, a 0 seaport, a river harbor or similar action region, the methods having the features of claim 1 or 2. Advantageous modifications are the subject of the claims that are directly or indirectly dependent on claim 1 or 2.
In a first embodiment of the methods of the invention, with the aid of a data-processing system, an optical image, or a representation that approximates a cartographic representation (referred to hereinafter as map representation or aerial image), of the action region to be monitored is superposed over radar images of an instantaneous status of the action region, the images having been generated by a radar system, and a combination image obtained through the superposing of a radar image and the optics! image (aerial image) is then 2o displayed on a monitor.
In connection with realizing the methods of the invention, a radar system having an antenna that is fixed to a building, preferably the tower of an airport, a seaport or a river harbor, is advantageous; such arrangements are known from DE 40 07 611 C2 or 40 07 612 C2.
An optical image refers to a continuous image of the action region to be monitored, the image corresponding to a photographic representation. A
continuous image is an image that is generated to display only the stationary structures that are necessary for the monitoring and management of air or maritime traffic, such as buildings and ground facilities or docks, including the entire flying field/taxiway or the entire harbor. The image does not, however, include any mobile targets that change their position, such as aircraft, ships, tugboats, boarding vehicles, tankers, passenger buses, luggage carts, etc., or any temporarily "parked" (immobile, moored) objects. In other words, in the continuous image or aerial image of an action region to be monitored, such as an airport, a seaport or a river harbor, the flying field/taxiway or the actual harbor region, appears completely empty.
~ According,to a second preferred embodiment of the methods of the invention, the combination image of an action region that has been obtained through the superposing process is displayed on an observation or monitoring platform of a tower of airports, seaports or river harbors; tram there, it is transmitted to receiving monitors of mobile targets in the action region, and o displayed on them. Thus, a connection can be made from the tower to any mobile target carrying personnel, which are typically already provided with the corresponding receiving devices necessary for communication, in order to transmit appropriate information or instructions, possibly also with respect to mobile targets located in the immediate vicinity.
Furthermore, according to a preferred modification of a second embodiment of the methods according to the invention, a device that receives and processes signals of a differential GPS (Global Positioning System), and is respectively associated with a specific mobile target and can be activated by the target, can determine the target's instantaneous position from the plurality of mobile targets displayed on a transmitted. combination image, and possibly highlights at least a portion of the path that this mobile target has traversed (e.g., 1 o with an afterglow) on its receiving monitor, preferably also with color marking. 1f mobile targets detected by the radar system are displayed in color, the mobile target detected by the differential GPS is characterized by a particularly prominent color marking.
If, as is typically the case for most larger airports, seaports or river harbors, a device that processes GPS signals is provided, the method of the invention creates a highly-precise observation and monitoring system for such airports, seaports or river harbors. The linking of the device that processes GPS
signals in a tower and the device that processes differential GPS signals in the mobile targets, and the linking of receiving and display devices that are also 2o generally provided in mobile targets, such as monitors, a display, etc., presents the personnel of mobile targets, such as pilots, captains, navigators and general vehicle operators, not only with precise position information about their own vehicle, but also with comprehensive information about vehicles Located in the immediate and remote surroundings, and their anticipated directions of movement.
In addition, according to the invention, enlarging specific action region sectors of interest, such as through zooming, offers personnel on mobile targets a far better overview, particularly of the immediate vicinity.
According to a further advantageous modification of the invention, an optical image/aerial image of the action region to be monitored, which is to be sup~rposed over the radar image, is stored in the data-processing system. This 1 o type of stored image can then be layered as the background beneath a radar image, which is adapted in its dimensions to the stored image.
Upon the availability of a combination image formed from a radar image and an optical image superposed over the radar image, or an optical image layered as the background beneath the radar image, points, edges, etc., that z s originate from stationary, immobile targets such as buildings or other stationary installations, and can be clearly distinguished on the radar image by persons monitoring the action region detected by the radar, can be interpreted more easily as such, identified precisely with respect to their position, and therefore uniquely associated immediately with any fixed, immobile target.
20 In an advantageous modification of the method of the invention, the optical image is stored in color in the data-processing system, and is therefore ready for retrieval. If such a color optical image is layered as the background beneath a radar image, which has been correspondingly adapted in its dimensions, and can only be displayed in black and white, as stipulated by the system, this further improves the interpretation of the obtained combination image and the association and identification of prominent points, edges, etc., that are particularly emphasized on the radar image.
According to a further advantageous embodiment of the method according to the invention, all of the back-scattered points of stationary elements or targets of a scene that are likewise present in the optical images can be gated out of the radar image, which is preferably superposed over a continuous optical image, or a corresponding color map representation as the background, so only the back-scattered points of targets that are not present in the optical imagelmap representation are represented in the sublayered optical image/map representation.
In this way, it is possible not only to detect incorrectly-parked objects, for example, but also objects such as containers or the like that are parked temporarily, and are known to be halted for preparations for immediate transport, but also to make the monitoring personnel particularly aware of these objects..
In an especially advantageous manner, a combination image generated in accordance with the invention can be used not only to correctly interpret mobile 2 o targets, from smaller vehicles, transport vehicles, luggage carts or the like, up to large vehicles, such as aircraft or ships, but to identify the precise position or the path that has just been traversed by a mobile target.
Furthermore, according to another advantageous embodiment of the invention, al( targets that have been deteoted by the radar system and are not present in the optical image, including standing ("parked") and mobile targets, can be highlighted, for example by the assignment of a color to the targets that remain after al) stationary targets of a scene have been gated out, the targets not being present in the optics( image. In an advantageous modification of the invention, a different color can be assigned to the detected mobile targets from the one assigned to temporarily-parked, standing targets.
Parked and mobile targets that are not present in different sections of the optical image, but have been detected by the radar system, can be represented in different colors.
The method of the invention therefore creates numerous options for considerably facilitating and improving the interpretation of a radar image, not only with respect to mobile targets, but objects or targets that are only present temporarily ("parked"), and for identifying such objects or targets faster and more reliably.
Claims (10)
1. A method for displaying radar images of an action region to be monitored, such as an airport, a seaport or a river harbor, the images having been generated by a stationary radar system with the use of a data-processing system and displaying the action region to be monitored as a representation from the viewing position of the stationary radar system, characterized in that the radar images generated by the radar system, which indicate an instantaneous status of the action region to be monitored, are superposed with an optical image or an image that approximates a cartographic representation (map representation or aerial image) of the same action region, with the aid of the data-processing system, and a combination image of this action region, which has been obtained through the superposing of a radar image and the optical image of the map representation, is displayed,
2. A method for displaying radar images of an action region to be monitored, such as an airport, a seaport or a river harbor, including mobile targets located in the region, the images having been generated by a stationary radar system with the use of a data-processing system and displaying the action region to be monitored as a representation from the viewing position of the stationary radar system, characterized in that, with the aid of the data-processing system, each radar image of an instantaneous status of the action region to be monitored is superposed with an optical image or a representation (map representation or aerial image) of the same action region that approximates a cartographic representation; and that a combination image of this action region, which has been obtained through the superposing of a radar image and the optical image, is displayed on an observation and monitoring platform, and is transmitted from there to receiving monitors of mobile targets in the action region, and displayed on the monitors.
3. The method according to claim 2, characterized in that a differential GPS (Global Positioning System) receiving device, which is respectively associated with a specific mobile target and can be activated by the target, can determine the target's instantaneous position from the plurality of mobile targets displayed on a transmitted combination image, and possibly highlights at least a portion of the path that this mobile target has traversed (e.g., with an afterglow) on its receiving monitor.
4. The method according to claim 3, characterized in that the instantaneous position of only one particular mobile target and, possibly, the path that has been traversed by this target, is or are highlighted by a prominent color marking.
5. The method according to one of the foregoing claims, characterized in that an optical image (aerial image) of 0the action region to be monitored, the image being stored in the data-processing system, is layered as the background beneath the radar image, which has been adapted in its dimensions to the optical image.
6. The method according to one of the foregoing claims, characterized in that a color optical image (aerial image) of the action region to be monitored, the image being stored in the data-processing system, is layered as the background beneath a radar image that has been adapted in its dimensions to the color optical image.
7. The method according to one of the foregoing claims, characterized in that all of the back-scattered points of stationary elements or targets of a scene (present in the optical image) are gated out of the radar image, and only back-scattered points of targets that are not present in the optical image are displayed in the sublayered optical image.
8. The method according to one of the foregoing claims, characterized in that all of the back-scattered points of all stationary elements/targets of a scene are gated out of the radar image, and only the back-scattered points of mobile targets are displayed in the sublayered optical image.
9. The method according to one of the foregoing claims, characterized in that mobile targets that have been detected by the radar system, but are not present in the optical image, are displayed in color.
10. The method according to one of the foregoing claims, characterized in that mobile targets that have been detected by the radar system in different sectors (not present in the optical image) are displayed in different colors.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19806450.0 | 1998-02-17 | ||
| DE19806450A DE19806450A1 (en) | 1998-02-17 | 1998-02-17 | Method for monitoring airports, sea ports or other action region |
| PCT/EP1999/001028 WO1999042855A1 (en) | 1998-02-17 | 1999-02-17 | Method for representing radar images of an area of action under surveillance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2320754A1 true CA2320754A1 (en) | 1999-08-26 |
Family
ID=7857957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002320754A Abandoned CA2320754A1 (en) | 1998-02-17 | 1999-02-17 | Method for representing radar images of an area of action under surveillance |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1057044A1 (en) |
| CA (1) | CA2320754A1 (en) |
| DE (1) | DE19806450A1 (en) |
| WO (1) | WO1999042855A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465628C (en) * | 2004-06-08 | 2009-03-04 | 安捷伦科技有限公司 | Optically-augmented microwave imaging system and method |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8446321B2 (en) | 1999-03-05 | 2013-05-21 | Omnipol A.S. | Deployable intelligence and tracking system for homeland security and search and rescue |
| US7570214B2 (en) | 1999-03-05 | 2009-08-04 | Era Systems, Inc. | Method and apparatus for ADS-B validation, active and passive multilateration, and elliptical surviellance |
| US7782256B2 (en) | 1999-03-05 | 2010-08-24 | Era Systems Corporation | Enhanced passive coherent location techniques to track and identify UAVs, UCAVs, MAVs, and other objects |
| US7889133B2 (en) | 1999-03-05 | 2011-02-15 | Itt Manufacturing Enterprises, Inc. | Multilateration enhancements for noise and operations management |
| US7667647B2 (en) | 1999-03-05 | 2010-02-23 | Era Systems Corporation | Extension of aircraft tracking and positive identification from movement areas into non-movement areas |
| US7908077B2 (en) | 2003-06-10 | 2011-03-15 | Itt Manufacturing Enterprises, Inc. | Land use compatibility planning software |
| US7777675B2 (en) | 1999-03-05 | 2010-08-17 | Era Systems Corporation | Deployable passive broadband aircraft tracking |
| US8203486B1 (en) | 1999-03-05 | 2012-06-19 | Omnipol A.S. | Transmitter independent techniques to extend the performance of passive coherent location |
| US7739167B2 (en) | 1999-03-05 | 2010-06-15 | Era Systems Corporation | Automated management of airport revenues |
| US7965227B2 (en) | 2006-05-08 | 2011-06-21 | Era Systems, Inc. | Aircraft tracking using low cost tagging as a discriminator |
| US8314816B2 (en) * | 2009-06-08 | 2012-11-20 | Honeywell International Inc. | System and method for displaying information on a display element |
| EP3385747B1 (en) | 2017-04-05 | 2021-03-31 | Axis AB | Method, device and system for mapping position detections to a graphical representation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3210694A1 (en) * | 1982-03-24 | 1983-10-06 | Siemens Ag | Flight surveillance device |
| NL8802289A (en) * | 1988-09-16 | 1990-04-17 | Hollandse Signaalapparaten Bv | TOUR SEARCH SENSOR. |
| US5335298A (en) * | 1991-08-19 | 1994-08-02 | The United States Of America As Represented By The Secretary Of The Army | Automated extraction of airport runway patterns from radar imagery |
| US5448243A (en) * | 1991-12-30 | 1995-09-05 | Deutsche Forschungsanstalt Fur Luft- Und Raumfahrt E.V. | System for locating a plurality of objects and obstructions and for detecting and determining the rolling status of moving objects, such as aircraft, ground vehicles, and the like |
| US5179385A (en) * | 1992-01-02 | 1993-01-12 | International Marine Industries, Inc. | Visual navigation aid with point of interest feature |
| SG66213A1 (en) * | 1995-01-31 | 1999-07-20 | Mitsubishi Electric Corp | Display apparatus for flight control |
-
1998
- 1998-02-17 DE DE19806450A patent/DE19806450A1/en not_active Withdrawn
-
1999
- 1999-02-17 CA CA002320754A patent/CA2320754A1/en not_active Abandoned
- 1999-02-17 WO PCT/EP1999/001028 patent/WO1999042855A1/en not_active Application Discontinuation
- 1999-02-17 EP EP99906241A patent/EP1057044A1/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465628C (en) * | 2004-06-08 | 2009-03-04 | 安捷伦科技有限公司 | Optically-augmented microwave imaging system and method |
| US7940208B2 (en) | 2004-06-08 | 2011-05-10 | Agilent Technologies, Inc. | Optically-augmented microwave imaging system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999042855A1 (en) | 1999-08-26 |
| EP1057044A1 (en) | 2000-12-06 |
| DE19806450A1 (en) | 1999-08-26 |
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