JP4922216B2 - Mode S secondary monitoring radar and data collection method - 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, and a data collection method that stores data received by the mode S secondary monitoring radar.

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

  For example, the mode S secondary monitoring radar 1a includes an antenna 11, a transmission / reception unit 12a, and a signal processing unit 13a as shown in FIG. The antenna 11 is connected to the transmission / reception unit 12a, 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 reliably capture the transponder 2 with different processing, 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 transmits an all call question Qa to the mode S transponder 2a and the ATCRBS transponder 2b during the all call period TA (TA1, TA2). Then, an all call response Aa (Aa2, Aa2) received during a predetermined listening window Wa is 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.

  Information such as aircraft position information and altitude information extracted from the response A (Aa, Ar) and used to generate a target report is important information in air traffic control. Further, from the signal state of the response A, it is possible to grasp important information such as the environmental situation around the mode S secondary monitoring radar 1a. Further, it is possible to analyze the state of the aircraft (transponder), the mode S secondary monitoring radar, and the like using the response A received from the same aircraft over a long period of time.

  In order to perform such an analysis, the response A received in the past may be required. However, after the response processing units 132 and 133 extract necessary information from the response A and output it to the monitoring processing unit 135, Response A has not been saved. Therefore, information cannot be obtained later from the response A itself, and data such as a target report generated as digital data is used when necessary.

Also, it is assumed that the response A output from the receiver 123 to the response processing units 132 and 133 is also output to the signal collecting unit 14 and is stored in the storage device 142 after signal processing such as A / D conversion by the signal processing unit 141. If so, the stored response A can be read out and used when necessary. However, since the mode S secondary monitoring radar 1a receives a large number of responses A, the storage device 142 stores a plurality of received responses A as shown in FIG. Therefore, when the response A received from a specific aircraft in the past becomes necessary, if all the responses A received from many aircraft are stored in the storage device 142, any response A is received from the target aircraft. It is difficult to determine whether the response A is correct. That is, in the example shown in FIG. 7, three responses A are included, but the number of responses A that are received over a long period of time actually exceeds several hundreds or thousands, and the necessary responses A are received from the storage device 142. It is very difficult to extract the aircraft response A required from all these responses A to extract.
ICAO, `` Aeronautical Telecommunications Annex 10 Volume IV Surveillance Rader and Collision Avoidance System '', July 1998

  As described above, in the conventional method, when the past response A is to be analyzed, the digital data is converted into analog data, or the necessary response A is required from the enormous number of responses A stored in the storage device. Response A needed to be extracted. Therefore, difficult work was required to obtain the target data.

  Accordingly, the present invention provides a mode S secondary monitoring radar and a data collection method that make it possible to easily extract responses received from a target aircraft from responses received from aircraft stored and stored.

  A mode S secondary monitoring radar according to a feature of the present invention is a mode S secondary monitoring radar that receives a response signal transmitted from the aircraft in response to an interrogation signal transmitted to the aircraft. A designation means for inputting a mode S address, a marking means for outputting a mark signal for distinguishing whether or not the received response signal is a signal transmitted from an aircraft of the mode S address, the response signal, Processing means for storing the mark signal in correspondence with the mark signal.

  In addition, the method of collecting received data in the mode S secondary monitoring radar is a method of storing data in which the response signal received from the aircraft is stored in the storage device in response to the question signal transmitted to the aircraft by the mode S secondary monitoring radar. A method of collecting a mark signal that distinguishes whether a mode S address of a specific aircraft is input and whether the received response signal is a response signal transmitted from an aircraft of the mode S address. And generating the response signal and storing the response signal and the mark signal in a storage device in association with each other.

  According to the present invention, the response received from the target aircraft can be easily extracted from the responses received from the stored and stored aircraft.

  A mode S secondary monitoring radar 1 according to the preferred embodiment of the present invention will be described with reference to FIGS. 1 to 3. As in the case described above with reference to FIG. 4, the mode S secondary monitoring radar 1 is installed in the ground station and uses the aircraft monitoring result based on the question response with the transponder 2 provided in the aircraft for air traffic control. To output as a target report. In the following description, the same reference numerals as those in the above description are assigned to the same configurations as the conventional ones, and the similar reference numerals are assigned to the similar configurations and the description thereof is omitted.

  As shown in FIG. 1, a mode S secondary monitoring radar 1 according to the best embodiment of the present invention is connected to an antenna 11, a transmission / reception unit 12 that transmits and receives signals via the antenna 11, and a transmission / reception unit 12. And a signal processing unit 13 that controls the question response and generates and outputs a target report based on the received response A. The mode S secondary monitoring radar 1 is connected to the signal processing unit 13, and includes an address designation unit 15 that outputs the mode S address of the aircraft input from the external input device 3 to the signal processing unit 13, and a transmission / reception unit 12. And a signal collecting unit 14 that accumulates and stores the received response A together with a mark signal that distinguishes whether or not the response A is a response received from the aircraft of the mode S address designated by the address designating unit 15.

  The transmission / reception unit 12 includes the same transmission / reception switcher 121 and transmitter 122 as those of the transmission / reception unit 12 a described above with reference to FIG. 5, but receives a signal output from the signal processing unit 13 instead of the receiver 123. 124 is provided.

  The signal processing unit 13 includes the same transmission control unit 131, mode S response processing unit 132, ATCRBS response processing unit 133, and timing signal generation unit 136 as the signal processing unit 13a described above with reference to FIG. A channel management unit 137 that outputs a signal to the receiver 124 is provided instead of the management unit 134, and a monitoring processing unit 138 that receives a signal from the address specifying unit 15 is provided instead of the monitoring processing unit 135.

  The scheduling unit 1371 of the channel management unit 137 allocates the all call period TA and the roll call period TR based on the timing signal output from the timing signal generation unit 136, and receives a response A (Aa, Ar). (Wa, Wr) scheduling is executed. Further, the scheduling unit 1371 outputs schedule information for each period Ta and Tr to the transmission control unit 131 and outputs schedule information for the listening window W to the mode S response processing unit 132 or the ATCRBS response processing unit 133.

  Based on the schedule information from the channel management unit 137 and the timing signal from the timing signal generation unit 136, the transmission control unit 131 reads out a question that is generated in advance and stored in a memory (not shown) and transmits the transmitter 122. Is transmitted to the transponder 2 via the transmission / reception switch 121 and the antenna 11.

  The receiver 124 receives the response A transmitted from the transponder 2 via the antenna 11 and the transmission / reception switch 121. Further, the receiver 124 outputs 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 output to the ATCRBS response processing unit 133.

  The mode S response processing unit 132 detects the mode S responses Aa1 and Ar input from the receiver 124 in the corresponding listening window W. Further, the mode S response processing unit 132 outputs data including the mode S address obtained by processing the detected response A to the monitoring processing unit 138, and the mode S address obtained by the processing is output to the channel management unit 137. Output to.

  The ATCRBS response processing unit 133 detects the ATCRBS response (mode A / C all call response) Aa2 input from the receiver 124 in the corresponding listening window Wa. Further, the ATCRBS response processing unit 133 outputs information including the mode S address obtained by processing the detected response A, the mode A code, the mode C code, and the like to the monitoring processing unit 138.

  The monitoring processing unit 138 creates and outputs a target report based on the data regarding the response A input from the mode S response processing unit 132 or the ATCRBS response processing unit 133.

  When the address designation unit 15 inputs the mode S address (target address) of the aircraft to be distinguished by the mark signal when the response A is stored in the storage device 142 from the external input device 3 to be connected, The address is output to the monitoring processing unit 138.

  During the all call period TA, the monitoring processing unit 138 outputs the target address input from the address designating unit 15 to the channel management unit 137. The monitoring processing unit 138 also outputs to the channel management unit 137 the mode S address (capturer address) of the aircraft that is to be captured during the roll call period TR. The capturing machine address may be stored in advance in a memory (not shown), or may be input to the monitoring processing unit 138 via the input device 3 and the address specifying unit 15 together with the target address.

  The marking unit 1372 of the channel management unit 137 stores the target address input from the monitoring processing unit 138 in a memory (not shown). In addition, the marking unit 1372 outputs, to the receiver 124, a mark signal that distinguishes a response received from the target aircraft in synchronization with the response A received from the target aircraft based on the stored target address.

  Specifically, in the all-call period TA, as shown in FIG. 6, one long listening window Wa is defined, and during this period of the listening window Wa, it corresponds to the response A received from the target aircraft. The period is partial. Accordingly, when the marking unit 1372 receives the mode S address (reception address) from the response processing unit 132, the marking unit 1372 compares the input reception address with the target address stored in the memory. In addition, when the target address matches the reception address, the marking unit 1372 outputs a mark signal indicating the response A of the target aircraft to the receiver 124.

  For example, when the mark signal is a 1-bit signal of either “0” or “1” and is defined as “1” in response to the target aircraft, the marking means 1372 If the address matches the received address, “1” is output during the period of the response Aa, and “0” is output during the period other than the response Aa.

  Also, in the roll call period TR, as shown in FIG. 6, a plurality of short listening windows Wr are defined, and among these listening windows Wr, a listening window Wr that receives a response A from the target aircraft. Is determined in advance by the scheduling means 1371. In other words, the capturing device address is determined for each listening window Wr. Therefore, the marking means 1372 is a response from the target aircraft during a period (a period in which the target address and the catcher address match) defined as the listening window Wr for receiving the response A from the target aircraft. Is output to the receiver 124.

  For example, when the mark signal is a 1-bit signal of either “0” or “1” and is defined as “1” in response to the target aircraft, the marking means 1372 "1" is output during the period of the listening window W determined by the response Ar from the aircraft, and "0" is output during periods other than the listening window W.

  The receiver 124 also outputs the response A output to the response processing units 132 and 133 to the signal collecting unit 14. Further, the receiver 124 outputs a mark signal input from the channel management unit 137 together with the response A to the signal collecting unit 14.

  When the response A and the mark signal are input from the receiver 124, the signal processing unit 141 performs signal processing such as A / D conversion on the response A, and corresponds the response A after the signal processing to the synchronized mark signal. And stored in the storage device 142. 2 and 3 show examples of the response A and the mark signal stored in the storage device 142. FIG.

  FIG. 2A shows a signal formed by the response Aa received during the all-call period TA, and FIG. 2B shows a mark signal input from the receiver 124 together with the signal shown in FIG. As described above, the mark signal is “1” during the period of the response Aa received from the target aircraft, and is “0” during the other periods. Therefore, when the response Aa from the target aircraft is extracted from the signal stored in the storage device 142, the response easily received from the target aircraft by extracting the response Aa corresponding to the period in which the mark signal is “1”. Aa can be extracted.

  Note that it is considered that there is a difference between the time when the receiver 124 receives the response Aa and the time when the mark signal is input from the channel management unit 137. Therefore, the response Aa and the mark signal output to the signal collecting unit 14 are delayed in the start (rising) of the mark by the mark signal with respect to the actual start of the response Aa, as shown in FIG. It is possible. On the other hand, since this delay time can be obtained from the processing time of the response processing units 132 and 133, this delay time may be taken into account when extracting the response Aa. Alternatively, when the signal processing unit 141 stores the response Aa and the mark signal, the response Aa may be delayed and stored in the storage device 142 in association with the mark signal.

  3A shows a signal formed by the response Ar received during the roll call period TR, and FIG. 3B shows a listening window Wr set during the roll call period TR. ) Is a mark signal input from the receiver 124 together with the signal of FIG. As described above, the mark signal shown in FIG. 3C is “1” for the period of the listening window W determined for the target aircraft, and “0” for the other periods. Therefore, when it is desired to extract the response Ar received from a specific aircraft later, the response Aa received from the target aircraft can be easily extracted by extracting the response Ar corresponding to the period in which the mark signal is “1”. be able to.

  2 and 3, the signals generated from the response A received during the all call period TA and the roll call period TR are shown separately, but in actuality, FIG. 2 (a) and FIG. 3 (a) The signal formed by the response A shown in FIG. 2 is continuous, and the mark signals shown in FIGS. 2B and 3C are also continuous.

  2 and FIG. 3 show an example in which there is one target aircraft and one target address is designated from the address designation unit 15. On the other hand, for example, if the mode S address of another aircraft is designated as the second target address, and the marking unit 1372 can output the second mark signal corresponding to the second target address and store it in the storage device 142, Two aircraft can be targeted. Similarly, a plurality of aircraft can be targeted by increasing the target address and marking signal.

  As described above, according to the present invention, when all received responses A are accumulated in the storage device, a mark signal for distinguishing the response A from the aircraft that can be specified by the designated mode S address is stored. Thus, since the response A from the predetermined aircraft is stored so that it can be distinguished, when the response A received later from the target aircraft becomes necessary, the necessary response A can be easily obtained. Can be extracted.

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 an example of the data memorize | stored in a signal collection part in an all-call period. It is an example of the data memorize | stored in a signal collection part in a roll call period. 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. It is an example of the data memorize | stored in a signal acquisition part by the conventional mode S secondary monitoring radar.

Explanation of symbols

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 ... Mode S response processing part 133 ... ATCRBS response processing Section 134 ... Channel management section 135 ... Monitoring processing section 136 ... Timing signal generation section 137 ... Channel management section 1371 ... Scheduling means 1372 ... Marking means 138 ... Monitoring processing section 14 ... Signal collection section 15 ... Address designation section (designation means)
141: Signal processing means (processing means)
142 ... Storage device 2 ... Transponder 3 ... Input device

Claims (6)

In response to the interrogation signal transmitted to the aircraft, a mode S secondary monitoring radar that receives a response signal transmitted from the aircraft,
A designation means for inputting a mode S address of a specific aircraft;
Marking means for outputting a mark signal for distinguishing whether or not the received response signal is a response signal transmitted from the aircraft of the mode S address;
Processing means for storing the response signal and the mark signal in correspondence in a storage device;
A mode S secondary monitoring radar comprising: The marking means is
In the all call period, it is determined whether or not the received response signal includes the mode S address. When the response signal includes the mode S address, the response signal is the period corresponding to the response signal. The mode S secondary monitoring radar according to claim 1, wherein a mark signal indicating that the response signal is transmitted from an aircraft having a mode S address is output. The marking means is
During the roll call period, a mark signal indicating that the response signal is a response signal transmitted from the aircraft of the mode S address is output for the period of the listening window set for the aircraft of the mode S address. The mode S secondary monitoring radar according to claim 1 or 2, characterized by the above. A mode S secondary monitoring radar is a data collection method for storing a response signal received from the aircraft in a storage device in response to an interrogation signal transmitted to the aircraft,
Entering the mode S address of a particular aircraft;
Generating a mark signal for distinguishing whether the received response signal is a response signal transmitted from the aircraft of the mode S address;
Storing the response signal and the mark signal in a storage device in association with each other;
A data collection method characterized by comprising: In the step of generating the mark signal, during the all-call period, it is determined whether the received response signal includes the mode S address. When the response signal includes the mode S address, The data collection method according to claim 4, wherein a mark signal indicating that the response signal is a response signal transmitted from the aircraft of the mode S address is output for a corresponding period. In the step of generating the mark signal, the roll call period indicates that the response signal is a response signal transmitted from the aircraft of the mode S address during the listening window set in the aircraft of the mode S address. The data collection method according to claim 4, wherein a mark is output.

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