JP5439351B2 - Secondary surveillance radar - Google Patents

Description

  Embodiments described herein relate generally to a secondary monitoring radar used for monitoring flight of an aircraft.

  A radar device such as a Mode S secondary surveillance radar (SSR mode S: Secondary Surveillance Radar Mode S) is used to monitor the flight of the aircraft. The mode S secondary monitoring radar transmits an interrogation signal to a transponder mounted on the aircraft, receives a response signal transmitted from the transponder, analyzes it, and monitors the aircraft.

  The transponder includes a mode S transponder and an ATCRBS transponder that are different in processing and transmission / reception signals. Therefore, the mode S secondary monitoring radar sets an all-call period and a roll-call period, and monitors an aircraft including each transponder. Specifically, during the all call period, a mode S collective question for an aircraft equipped with a mode S transponder and an ATCRBS collective question for an aircraft equipped with an ATCRBS transponder are transmitted and a response to each question is received. Further, the mode S secondary monitoring radar transmits a mode S individual question to the aircraft equipped with the mode S transponder captured during the all call period and receives a response to the question during the roll call period.

  For example, in the mode S secondary monitoring radar, when there is a reflector that reflects a signal, a plurality of responses including the same mode S address may be received during the all call period of the same scan. In addition, a response including the same mode S address as that of the aircraft captured during the roll call period may be received during the all call period. When such multiple detection occurs, the mode S secondary monitoring radar does not transfer the aircraft of the mode S address that has been multiple detected unconditionally to roll call, regardless of the cause. Also, when a response including the same mode S address as that of the aircraft to be captured during the roll call period is received, the aircraft is excluded from being captured during the roll call period of the aircraft that is continuing the roll call.

  Therefore, even when a response from a real aircraft is received, such as when a response transmitted from a real aircraft and a response that is a reflected signal are received, if multiple detections occur, capture during the roll call period is not possible. It will not be implemented and will continue to be captured during the all-call period, making it impossible to obtain altitude and identification information required for air traffic control.

  ATCRBS that continues to capture during the all-call period when the aircraft equipped with the Mode S transponder is captured during the all-call period due to multiple detections, so there is a high possibility of occurrence of garble and interleaving. There is a risk of reducing the detection rate of aircraft equipped with transponders and the detection rate of new aircraft. It will also cause an increase in fruit response.

Michael C. Stevens “Secondary Surveillance Radar” 1998, ISBN 0-89006-292-7

  As described above, when an aircraft equipped with a mode S transponder is captured during an all-call period due to multiple detection, the detection rate of an aircraft equipped with an ATCRBS transponder or a new aircraft may be reduced.

  Therefore, according to the embodiment, a secondary surveillance radar is provided that prevents a decrease in the detection rate of other aircraft due to multiple detection of Mode S responses.

  The secondary monitoring radar according to the embodiment is an apparatus that transmits a collective question during an all-call period, transmits an individual question during a roll call period, and monitors an aircraft flight using a response received from the collective question and the individual question, respectively. In this case, a capture machine list storage unit, a designated machine list storage unit, a transmission unit, a determination unit, and an update unit are provided. The catcher list storage unit stores a roll call catcher list that is a list of mode S addresses of aircrafts to which individual questions are transmitted during the roll call period. The designated machine list storage unit stores a roll call designated machine list that is a list of mode S addresses of aircraft designated as transmission targets of individual questions during the roll call period. The transmission means transmits a collective question during the all call period, and transmits an individual question to the aircraft registered in the roll call capturing machine list and the roll call designated machine list during the roll call period. When receiving a response from the aircraft to the collective question, the determination unit determines whether or not the mode S address included in the response received for the collective question is included in the roll call catcher list. If the determining means determines that the mode S address is not registered in the roll call catcher list, the updating means adds the mode S address of the aircraft to update the catcher list, and the determining means updates the mode S address. Is registered in the roll call catcher list, and when an operation for sending an individual question during the roll call period is input, the mode S address of the aircraft is added and the roll is added. Update the call designated machine list.

It is a functional block diagram explaining the structure of the mode S secondary monitoring radar which concerns on embodiment. It is a figure explaining reception of the signal in the mode S secondary surveillance radar of FIG. It is a flowchart explaining the process of the all call period in the mode S secondary monitoring radar of FIG.

  The mode S secondary monitoring radar 1 according to the embodiment will be described with reference to FIG. The mode S secondary monitoring radar 1 is a device that is installed in a ground station and monitors the flight of an aircraft based on a question answer with a transponder provided in the aircraft. In this mode S secondary monitoring radar 1, a collective question is transmitted during the all-call period, an individual question is transmitted during the roll call period, and the flight of the aircraft is monitored using a response received respectively from the collective question and the individual question. .

  In the conventional mode S secondary monitoring radar, when the mode S address included in the response received during the all call period is the same as the mode S address of the aircraft to be monitored (roll call trapping machine) during the roll call period, When a plurality of responses including the same mode S address in the period are received, as a multiple detection, the monitoring in the roll call period is stopped for these aircrafts and the monitoring is performed in the all call period.

  On the other hand, in the mode S secondary monitoring radar 1 according to the embodiment, the mode S address included in the response received during the all call period is the case of multiple detection in which the mode S address of the roll call catcher is the same. However, monitoring of the roll call catcher will continue. In the case of multiple detection in which a plurality of responses including the same mode address are received during the same all call period, the previously detected aircraft is monitored as a roll call catcher. Further, in the mode S secondary monitoring radar 1, aircraft having the same mode S address are monitored during the all call period, but if an operation requesting monitoring during the roll call period is input, the roll call period To be monitored. That is, even in the case of multiple detection, a plurality of aircraft having the same mode S address are set as monitoring targets during the roll call period.

  As shown in FIG. 1, the mode S secondary monitoring radar 1 is connected to an antenna 11, a transmission / reception unit 12 that transmits / receives a signal via the antenna 11, and a transmission / reception unit 12, and controls and receives a response to a question. And a signal processing unit 13 for generating and outputting a target report, and a storage unit 14 for storing data necessary for the processing.

  The transmission / reception unit 12 includes a transmission / reception switch 121, a transmitter 122, and a receiver 123. The transmission / reception unit 12 transmits a question (question signal) via the antenna 11, and receives a response (response signal) received by the antenna 11 as a signal processing unit. 13 is output.

  The signal processing unit 13 includes a transmission control unit 131 that controls transmission control of a question, a mode S response processing unit 132 that processes a mode S response received from an aircraft equipped with a mode S transponder, and an ATCRBS response received from an aircraft equipped with an ATCRBS transponder. An ATCRBS response processing unit 133 for processing, a channel management unit 134 for scheduling the all call period and the roll call period, and a monitoring processing unit 135 for generating a target report according to the response.

  The storage unit 14 includes a roll call catcher list 141 relating to information of aircraft to be monitored (roll call catcher) during the roll call period, and an aircraft (roll call designated machine) that has been subject to monitoring during the roll call period by a designated operation. Is stored.

  Specifically, the roll call catcher list 141 is data in which the mode S address of the roll call catcher is associated with the position information and flight information of the roll call catcher acquired during the past roll call period.

  The roll call designated machine list 142 is data relating to an aircraft having the same mode S address as that of the roll call catcher and designated to be monitored by sending an individual question and receiving a response during the roll call period. That is, it is data relating to an aircraft designated by an operation of an operator or the like among multiple detected aircraft. Specifically, the roll call designated machine list 142 is data in which the mode S address of the roll call designated machine is associated with the position information and flight information of the roll call designated machine acquired during the roll call period.

  The monitoring processing unit 135 includes an output processing unit 135a, a determining unit 135b, and an updating unit 135c in order to execute processing related to monitoring in the case of multiple detection.

  The output processing unit 135a outputs the mode S address included in the input response when the processing result of the response received in response to the transmitted batch question or individual question is input from the mode S response processing unit 132 or the ATCRBS response processing unit 133. The apparatus 2 is made to output. Further, the output processing means 135a indicates that the multiple detection has occurred when the mode S address included in the response received during the all call period is included in the roll call catcher list 141, that is, when multiple detection has occurred. You may make it output to the output device 2. FIG.

  When a new aircraft is detected by receiving a response during the all call period, the determination unit 135b reads the roll call catcher list 141 from the storage unit 14, and the same mode S address as the mode S address included in the received response It is determined whether or not the S address is included in the roll call catcher list 141.

  The updating unit 135c updates the roll call capturing device list 141 or the roll call designated device list 142 using the determination result of the determining unit 135b. Specifically, when the update unit 135c receives a response from an aircraft not registered in the roll call catcher list 141 during the all call period, the update unit 135c adds the mode S address of the aircraft and updates the roll call catcher list 141. To do. Further, the update unit 135c inputs, via the input device 3, an operation for designating an individual question transmission target during the roll call period for an aircraft having the same mode S address as that of the roll call catcher output to the output device 2. Then, the mode S address of this aircraft is added and the roll call designated machine list 142 is updated.

  Here, if no response is received even if an individual question is transmitted to the aircraft registered in the roll call catcher list 141 and the roll call designated machine list 142 during the roll call period, the update unit 135c No aircraft is deleted from the list 141,142. For example, when the aircraft moves from the monitoring airspace of the mode S secondary monitoring radar 1, or when a response received in the past is a false detection and a roll call catcher or a roll call designated machine is set due to this false detection. Conceivable.

  Further, when the question and answer during the roll call period continues for the aircraft registered in the roll call designated machine list 142, the registration in the roll call designated machine list 142 is changed to the registration in the roll call catcher list 141. It may be.

  As in the example shown in FIG. 2, the antenna 11 receives the response # 1 including the mode S address “1111” from the aircraft 4a during the all call period, and subsequently includes the same mode S address “1111” from the aircraft 4b. Assume that response # 2 is received. In this case, since the aircraft # 4 is registered in the roll call catcher list 141 with the response # 1 detected earlier, the aircraft 4b is not registered in the roll call catcher list 141. Even after that, even if response # 2 including the same mode S address “1111” is received from the aircraft 4b, it is not subject to roll call monitoring because it is a multiple detection. Specified as a monitoring target.

  Next, the flow of processing in the all-call period in the mode S secondary monitoring radar 1 will be described using the flowchart shown in FIG.

  In the mode S secondary monitoring radar 1, during the all call period, the transmitter 122 transmits an all call question under the control of the transmission control unit 131 (S1). When the response to the question transmitted in step S1 is received by the receiver 123, it is processed by the mode S response processing unit 132 or the ATCRBS response processing unit 133 as detection of a new aircraft (S2).

  When the processing result of the mode S response processing unit 132 or the ATCRBS response processing unit 133 is input, the output processing unit 135a outputs the processing result to the output device 2 (S3). For example, when the output device 2 is a display device and is displayed as an aerial chart on the display device, the output processing means 135a adds data about the received aircraft to the aerial map displayed on the display device. To display.

  Further, the determination unit 135b compares the mode S address of the newly received response with the mode S address included in the roll call catcher list 141, and determines whether or not a roll call catcher with the same mode S address exists. Is determined (S4).

  If it is determined by the determination means 135b that there is a roll call catcher with the same mode S address (YES in S4), this aircraft will be the target of all-call monitoring for question answering even in the next all-call period. The updating unit 135c does not need to update this aircraft to the roll call catcher list 141 (S5). On the other hand, if it is determined that there is no roll call catcher having the same mode S address (NO in S4), the updating unit 135c adds this aircraft as a roll call catcher to the roll call catcher list 141 (S6). .

  As a result of the output processing means 135a outputting to the output device 2 the aircraft that has been selected as the all call capture target aircraft in step S5, the result of multiple detection via the input device 3 is that the aircraft to be monitored in the all call period is the roll call period. When an operation for changing to a monitoring target is input (YES in S7), the updating unit 135c adds this aircraft to the roll call designated machine list 142 as a roll call designated machine (S8).

  If the aircraft set as the roll call designated machine is not an aircraft that actually flies as in step S8, question answering will not be continued in the subsequent roll call processing, and the roll call will not be monitored. No problem.

  As described above, according to the mode S secondary monitoring radar 1 described above, even in the case of multiple detection, the data obtained as a result of the response is not used, but the aircraft previously registered as the roll call catcher is not rolled. Call monitoring continues and aircraft detected later are monitored all calls. Further, even if an aircraft that has been monitored by all calls in the case of multiple detection is selected via the input device 3, it can be registered as a roll call designation machine and can be a roll call monitoring target. Therefore, it is possible to reduce the number of aircrafts equipped with Mode S transponders to be monitored during the all-call period, to prevent aircraft equipped with Mode S transponders from being monitored, and to detect ATCRBS transponders. It is possible to prevent a reduction in the rate and a reduction in the detection rate of new aircraft during the all-call period.

DESCRIPTION OF SYMBOLS 1 ... Mode S secondary monitoring radar 11 ... Antenna 12 ... Transmission / reception part 121 ... Transmission / reception switch 122 ... Transmitter 123 ... Receiver 13 ... Signal processing part 131 ... Transmission control part 132 ... Response processing part 133 ... ATCRBS response processing part 134 ... Channel management unit 135 ... Monitoring processing unit 135a ... Output processing unit 135b ... Determination unit 135c ... Updating unit 14 ... Storage unit 141 ... Roll call catcher list 142 ... Roll call designation unit list 2 ... Output unit 3 ... Input unit 4a ... Aircraft 4b ... Aircraft

Claims (1)

A mode S secondary monitoring radar that transmits a batch question during an all-call period, transmits an individual question during a roll call period, and monitors the flight of the aircraft using responses received from the batch question and the individual question,
A catcher list storage unit for storing a roll call catcher list which is a list of mode S addresses of aircrafts to which individual questions are transmitted during the roll call period;
A designated machine list storage unit for storing a roll call designated machine list which is a list of mode S addresses of aircraft designated as transmission targets of individual questions during the roll call period;
Sending means to send a batch question during the all call period, and to send an individual question to the aircraft registered in the roll call catcher list and the roll call designated machine list during the roll call period,
A determination means for determining whether or not the mode S address included in the response received for the collective question is included in the roll call catcher list when receiving a response from the aircraft to the collective question;
If the determination means determines that the mode S address is not registered in the roll call catcher list, the mode S address of the aircraft is added and the catcher list is updated, and the mode S address is detected by the determination means. When it is determined that the aircraft is registered in the aircraft list and an operation for transmitting the individual aircraft as an individual question during the roll call period is input, the mode S address of the aircraft is added to the roll call designated aircraft list Updating means for updating
A secondary surveillance radar comprising:

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