JP5025452B2 - Secondary monitoring radar equipment - Google Patents

Description

  The present invention relates to a mode S secondary monitoring radar that captures an aircraft by setting an all-call period and a roll call period.

  In air traffic control, information (target report) on the flight of each aircraft monitored by a Mode S secondary surveillance radar (SSR mode S: Secondary Surveillance Radar Mode S) is used. As shown in FIG. 4, the mode S secondary monitoring radar 1a transmits a question to the transponder 2 (2a, 2b) mounted on the aircraft, and is transmitted from the transponder 2 in response to the transmitted question. The response is received, the received response is decoded, the aircraft flying in the monitored airspace is monitored, and the target report is output.

  Specifically, the mode secondary monitoring radar 1a includes an antenna 11, a transmission / reception unit 12, and a signal processing unit 13a as shown in FIG. The antenna 11 is connected to the transmission / reception unit 12, transmits a signal input from the transmitter 122 via the transmission / reception switch 121 to the transponder 2, and receives a signal received from the transponder 2 to the receiver 123 via the transmission / reception switch 121. Output.

  The signal processing unit 13a includes a transmission control unit 131 that controls transmission of a signal via the transmitter 122, a mode S response processing unit 132 that performs processing upon receiving a signal received by the receiver 123, and an ATCRBS response process. Unit 133, a channel management unit 134 that manages timing such as signal transmission / reception, a monitoring processing unit 135 that generates a target report using signals supplied from the response processing units 132 and 133, and timing of each process And a timing signal generator 136 for controlling.

  As shown in FIG. 4, the transponder 2 mounted on the aircraft monitored by the mode S secondary monitoring radar 1a includes a mode S transponder 2a and an ATCRBS transponder 2b having different processing and transmission / reception signals. The mode S secondary monitoring radar 1a has a mode S response processing unit 132 and an ATCRBS response processing unit 133 in order to capture the transponder 2 in which these processes are different, and as shown in FIG. Different processing is executed in each period, distinguishing between “period TA” and “roll call period TR”. The transmission / reception timing of the question response between the mode S secondary monitoring radar 1a and the transponder 2, the format of the question response, and the like are executed based on internationally standardized standards (for example, see Non-Patent Document 1).

  Specifically, as shown in FIG. 6, the mode S secondary monitoring radar 1a, during the all call period TA (TA1, TA2), asks the mode S transponder 2a and the ATCRBS transponder 2b for all call questions Qa ( Qa1, Qa2) are transmitted, and all-call responses Aa (Aa1, Aa2) received during a predetermined listening window Wa are detected.

  In addition, as shown in FIG. 6, the mode S secondary monitoring radar 1a individually controls each mode S transponder 2a set as an acquisition target of the roll call period TR in the roll call period TR (TR1). The roll call question Qr (Qr1, Qr2) is transmitted, and the roll call response Ar (Ar1, Ar2) received during a predetermined listening window Wr (Wr1, Wr2) defined for each roll call question Qr is detected. To do.

  Here, as shown in FIG. 6C, the listening window Wa of the all call response Aa is set wider than the listening window Wr of each roll call response Ar. This is because the mode S secondary monitoring radar 1a can predict the reception timing of the roll call response Ar received in the roll call period TR, whereas in the all call period TA, the aircraft in the coverage area This is because the all call response Aa may be received.

  In the mode S secondary monitoring radar 2, the aircraft is monitored using the responses Aa and Ar received with respect to the questions Qa and Qr as shown in FIG. 6, but even if the questions Qa and Qr are transmitted, the aircraft is monitored. It may be difficult to detect the responses Aa and Ar transmitted from. There are also aircraft in which it is unknown whether responses Aa and Ar are transmitted in response to questions Qa and Qr.

  During the all-call period, all-call responses Aa are received from a plurality of aircraft during the period of one listening window Wa. For this reason, a plurality of all-call responses Aa to be received may be superimposed, and the all-call responses Aa may not be detected (for example, see Patent Document 1). On the other hand, Patent Document 1 describes a technique for capturing an aircraft by executing an all-call response during a roll call period in response to a superposition of an all-call response Aa during the all-call period.

On the other hand, during the roll call period, in principle, the roll call response Ar is received from only one aircraft during the period of one listening window Wr. Therefore, the superimposition of the roll call response Ar does not become a problem. However, since the period of the listening window Wr, which is the reception timing of the roll call response Ar, is set to be relatively short, an aircraft may be detected if the roll call response Ar cannot be received during the period of the listening window Wr for some reason. It becomes difficult.
JP 2007-248296 A ICAO, `` Aeronautical Telecommunications Annex 10 Volume IV Surveillance Rader and Collision Avoidance System '', July 1998

  As described above, when the roll call response Ar from the aircraft cannot be detected, the mode S secondary monitoring radar 1a may interfere with the aircraft control when an aircraft that cannot monitor the flight status occurs.

  Accordingly, the present invention provides a Mode S secondary surveillance radar that enables question answering with the required aircraft and ensures acquisition of an aircraft (Mode S aircraft) with Mode S transponder 2a.

  The mode S secondary monitoring radar according to the feature of the present invention is a mode S secondary monitoring radar that captures an aircraft by setting an all call period and a roll call period, and transmits a roll call question during the all call period. Transmitting means for receiving, a receiving means for receiving a roll call response corresponding to the roll call question, and a decoding means for decoding the roll call response received at a timing set in advance in the all call period.

  According to the present invention, it is possible to monitor the mode S machine, which is difficult to monitor with the conventional monitoring method.

  As in the case described above with reference to FIG. 4, the mode S secondary monitoring radar according to the best embodiment of the present invention is installed in the ground station and is based on an interrogation with the transponder 2 provided in the aircraft. Is output as a target report to be used for air traffic control.

  As shown in FIG. 1, the mode S secondary monitoring radar 1 according to the best embodiment of the present invention has an antenna 11 and a transmission / reception unit 12 as compared with the mode S secondary monitoring radar 1 a described above with reference to FIG. 5. However, the difference is that a signal processing unit 13 is provided instead of the signal processing unit 13a, and an input unit 14 is further provided.

  In addition to the transmission control unit 131, the mode S response processing unit 132, the ATCRBS response processing unit 133, the channel management unit 134, the monitoring processing unit 135, and the timing signal generating unit 136 described above with reference to FIG. 135 includes a selection unit 137 that supplies a mode selection signal to 135, and a setting unit 138 that sets a mode S address in the monitoring processing unit 135. The mode selection signal supplied from the selection unit 137 to the monitoring processing unit 135 and the mode S address supplied from the setting unit 138 to the monitoring processing unit 135 are selected from the input unit 14 according to the operator's operation, respectively. Is input.

  The mode S secondary monitoring radar 1 according to the preferred embodiment of the present invention executes a “first mode” in which an all-call question answering is performed in the all-call period TA, or a roll-call question answering in the all-call period TA. One of the “second modes” can be selected. In the mode S secondary monitoring radar 1 in which the first mode is selected, the all-call question answering is executed during the all-call period TA and the roll call is performed during the roll call period TR as in the conventional case described above with reference to FIG. Perform question answering. Further, in the mode S secondary monitoring radar 1 in which the second mode is selected, as shown in FIG. 2, the roll call question response is executed during the all call period TA, and the roll call question response is also performed during the roll call period TR. Execute. That is, in the mode S secondary monitoring radar 1, when the second mode is selected, the all call question answer is not executed, but only the roll call question answer is executed.

  The signal processing unit 13 executes each operation in the mode S secondary monitoring radar 1 based on the timing signal created by the timing signal generation unit 136.

  Based on the timing signal from the timing signal generator 136, the channel manager 134 sets allocation of the all call period TA and the roll call period TR in the beam dwell time T, and sets a window for each response A (Aa, Ar). (Hereinafter, this is referred to as a “listening window”) W (Wa, Wr) scheduling is executed. In addition, the channel management unit 134 supplies schedule information regarding the allocated periods Ta and Tr to the transmission control unit 131, and sets the schedule information of the listening window W for detecting a response in each period to the mode S response processing unit. 132 or the ATCRBS response processing unit 133.

The transmission control unit 131 reads out a question generated in advance and stored in a memory (not shown) based on the schedule information regarding each period from the channel management unit 134 and the timing signal from the timing signal generation unit 136. The signal is supplied to the transmitter 122 and transmitted to the transponder 2 via the transmission / reception switch 121 and the antenna 11. Specifically, the transmission control unit 131 transmits an all call question (mode S all call question Qa1 and mode A / C all call question Qa2) during the all call period TA when the first mode is selected, and the second mode. During the all-call period TA at the time of selection, a roll call question (mode S roll call question Qr) is transmitted. Further, the transmission control unit 131 transmits the roll call question Qr during the roll call period TR regardless of whether the mode is the first mode or the second mode.

  The receiver 123 receives the response A transmitted from the transponder 2 via the antenna 11 and the transmission / reception switch 121. In addition, the receiver 123 supplies the received mode S response (mode S all call response Aa1 and mode S roll call response Ar) to the mode S response processing unit 132, and ATCRBS response (mode A / C all call response Aa2). Is supplied to the ATCRBS response processing unit 133.

  The mode S response processing unit 132 detects and processes the mode S responses Aa1 and Ar supplied from the receiver 123 in the corresponding listening window W. In the mode S response processing unit 132, selection of the first mode or the second mode is operated from the monitoring processing unit 135, and the mode S response processing unit 132 executes processing according to the mode.

  Therefore, the mode S response processing unit 132 is supplied with the mode S all call response Aa1 during the all call period TA when the first mode is selected. The mode S response processing unit 132 to which the mode S all call response Aa1 is supplied decodes the mode S all call response Aa1, and determines whether or not the own site ID and the PI field of the mode S all call response match. When they match, the mode S all-call response Aa1 is supplied to the monitoring processing unit 135 as a signal to be processed. On the other hand, when they do not match, the mode S response processing unit 132 discards the mode S all call response Aa1 as a signal not to be processed.

  Further, during the all call period TA when the second mode is selected, the mode S response processing unit 132 is supplied with the mode S roll call response Ar. Furthermore, during the roll call period TR, the mode S response processing unit 132 is supplied with the mode S roll call response Ar regardless of whether the first mode is selected or the second mode is selected. The mode S response processing unit 132 to which the mode S roll call response Ar is supplied determines whether or not the predicted mode address matches the mode S address of the mode S roll call response (response mode S address). Then, the mode S roll call response Ar is supplied to the monitoring processing unit 135 as a signal to be processed. On the other hand, when they do not match, the mode S response processing unit 132 discards the mode S roll call response Ar as a signal not to be processed.

  Note that the listening window Wa for detecting the mode S roll call response in the all call period TA when the second mode is selected is the same as the listening window Wa for the normal all call period TA set in the first mode. Therefore, as can be seen from FIG. 2, the listening window Wa set for the all call period TA when the second mode is selected is set wider than the listening window Wr set for the roll call period TR.

  The ATCRBS response processing unit 133 detects and processes the ATCRBS response (mode A / C all call response) Aa2 supplied from the receiver 123 in the corresponding listening window Wa.

  Specifically, during the all call period TA when the first mode is selected, the ATCRBS response processing unit 133 is supplied with the ATCRBS response Aa2. The ATCRBS response processing unit 133 supplied with the ATCRBS response Aa2 decodes the ATCRBS response Aa2, and supplies the ATCRBS response Aa2 to the monitoring processing unit 135 when it is determined that the ATCRBS response Aa2 is a processing target. On the other hand, the ATCRBS response processing unit 133 discards the ATCRBS response Aa2 that is not a processing target.

  In the all call period TA and the roll call period TR when the second mode is selected, the ATCRBS response processing unit 133 does not execute the process because the ATCRBS response Aa2 is not supplied.

  The monitoring processing unit 135 creates and outputs a target report based on the response supplied from the mode S response processing unit 132 or the ATCRBS response processing unit 133. Based on an operation from the input unit 14, the monitoring processing unit 135 is supplied with a mode selection signal from the selection unit 137 and a mode S address from the setting unit 138. When the mode selection signal is supplied from the selection unit 137, the monitoring processing unit 135 selects a mode according to the supplied mode selection signal, and the mode selected by the transmission control unit 131 and the mode S response processing unit 132 is selected. Set. Further, the monitoring processing unit 135 supplies the mode S address supplied from the setting unit 138 to the transmission control unit 131 and the mode S response processing unit 132.

  In the transmission control unit 131 to which the mode S address is supplied from the monitoring processing unit 135 while the second mode is selected by the monitoring processing unit 135, the all-call period for the transponder 2a identified by the supplied mode S address. A mode S roll call question Qr to be transmitted to the TA is generated. In addition, the second mode is selected by the monitoring processing unit 135 and the mode S response processing unit 132 to which the mode S address is supplied from the monitoring processing unit 135 is the mode S roll call response Ar received during the all-call period TA. The prediction is made using the supplied mode S address as the prediction mode S address used in the determination.

  Processing in the mode S secondary monitoring radar 1 according to the present invention will be described using the flowchart shown in FIG. FIG. 3 is a flowchart for explaining the process for the mode S question response in one sweep.

  When the all call period TA is started and the mode S secondary monitoring radar 1 has selected the first mode (YES in S001), the transmitter 122 sets the mode S all call question Qa under the control of the transmission control unit 131. Transmit (S002). When receiving the mode S all call response Aa1, the receiver 123 supplies the mode S response processing unit 132 (S003). The mode S response processing unit 132 detects the mode S all call response Aa1 supplied via the listening window Wa (S004).

  Subsequently, the mode S response processing unit 132 determines whether or not the PI field included in the detected mode S all call response Aa matches the own site ID, so that the mode S all call response Aa is determined in step S002. It is determined whether or not the response is a response transmitted to the transmitted mode S all call question Qa (S005).

  When the local site ID and the PI field match (YES in S005), the mode S response processing unit 132 supplies the mode S all call response Aa supplied in step S003 to the monitoring processing unit 135 as a response to be processed (step S003). S006). In addition, the monitoring processing unit 135 generates and outputs a target report using the mode S all call response Aa supplied in step S006 (S007). On the other hand, when the own site ID and the PI field do not match (NO in S005), the mode S response processing unit 132 discards the mode S all call response Aa without supplying it to the monitoring processing unit 135 as an unprocessed response. (S008).

  On the other hand, when the all call period TA is started and the second mode is selected for the mode S secondary monitoring radar 1 (NO in S001), the mode S secondary monitoring radar 1 performs processing in the roll call period TR. The same processing is executed. Specifically, first, the transmission control unit 131 transmits a mode S roll call question Qr (S009). Upon receiving the mode S roll call response Ar, the receiver 123 supplies the mode S response processing unit 132 (S010). The mode S response processing unit 132 detects the mode S roll call response Ar supplied via the listening window Wa (S011).

  Subsequently, the mode S response processing unit 132 determines whether or not the predicted mode S address matches the mode S address (response mode S address) included in the detected mode S roll call response Ar. It is determined whether or not the S roll call response Ar is a response transmitted to the mode S roll call question Qr transmitted in step S009 (S012).

  When the predicted mode S address matches the response mode S address (YES in S012), the mode S response processing unit 132 sends the mode S roll call response Ar supplied in step S010 to the monitoring processing unit 135 as a response to be processed. Supply (S013). In addition, the monitoring processing unit 135 generates and outputs a target report using the mode S roll call response Ar supplied in step S013 (S014). On the other hand, when the prediction mode S address and the response mode S address do not match (NO in S012), the mode S response processing unit 132 does not supply the mode S roll call response Ar to the monitoring processing unit 135 as a response not to be processed. (S015).

  In the roll call period, transmission processing of the mode S roll call question Qr, generation processing of the target report, and the like are performed in steps S101 to S107 as in the conventional case. Since the processing in steps S101 to S107 during the roll call period is the same as the processing in steps S009 to S015 described above, description thereof will be omitted.

  However, the transmission target of the mode S roll call question Qr transmitted in step S009 is an aircraft specified by the mode S address set by the setting unit 138, and the transmission of the mode S roll call question Qr transmitted in step S101. The target is an aircraft that is predetermined as a target to be captured in the roll call period TR.

  In addition, about the process regarding mode A / C question response, description is abbreviate | omitted here.

  As described above, according to the present invention, when the second mode is selected by the selection unit 137, the specific mode S set by the setting unit 138 is not executed in the all call period TA without performing the all call question response. The mode S roll call question Qr is transmitted to the address. As a result, the mode S roll call response Ar can be detected in the listening window Wa set wider than the normal listening window Wr. Therefore, the state of the mode S roll call response Ar that is difficult to detect by the conventional method is analyzed. It becomes easy to do.

It is a functional block diagram explaining the structure of the mode S secondary monitoring radar which concerns on the best embodiment of this invention. It is a timing chart explaining the process when the 2nd mode is selected by the mode S secondary surveillance radar of FIG. It is a flowchart explaining the process of the mode S question response in the mode S secondary monitoring radar of FIG. It is a conceptual diagram explaining the conventional mode S secondary monitoring radar and transponder. It is a functional block diagram explaining the structure of the conventional mode S secondary monitoring radar. It is a timing chart explaining the process in the conventional mode S secondary surveillance radar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Secondary monitoring radar 11 ... Antenna 12 ... Transmission / reception part 121 ... Transmission / reception switching device 122 ... Transmitter (transmission means)
123 ... Receiver (receiving means)
13: Signal processing unit 131: Transmission control unit (transmission means)
132... Mode S response processing unit (decoding means)
133 ... ATCRBS response processing unit 134 ... channel management unit 135 ... monitoring processing unit 136 ... timing signal generation unit 137 ... selection unit (selection means)
138 ... Setting unit 14 ... Input unit 2a ... Mode S transponder 2b ... ATCRBS transponder

Claims (1)

A mode S secondary surveillance radar that captures an aircraft by setting an all-call period and a roll-call period,
An input unit for inputting a mode S address from the outside;
Selecting means for selecting either a first mode for executing an all-call question answering in an all-call period or a second mode for executing a roll-call question answering in an all-call period;
When the first mode is selected, an all-call question is transmitted during the all-call period, and when the second mode is selected , a roll is performed for the aircraft identified by the mode S address during the all-call period. A transmission means for sending a call question;
Receiving means for receiving an all call response corresponding to the all call question or a roll call question corresponding to the roll call question;
When the first mode is selected, the all-call response received at the timing set in advance in the all-call period is decoded, and when the second mode is selected, the all-call period is set in advance. Decoding means for decoding the roll call response received from the aircraft identified by the mode S address at a timing;
A mode S secondary monitoring radar comprising:

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