Satellite receiving system GT value automatic test method, device, medium and product

Abstract

The invention discloses a satellite receiving system GT value automatic test method, equipment, a medium and a product, and relates to the field of satellite ground station automatic test. The method comprises the following steps: firstly, calculating factors by adopting a radio power source direct method test process; calculating an atmospheric correction coefficient according to environmental parameters actually measured by the ground station; acquiring a real-time radiation source angle diffusion coefficient by using moon observation data of Chang'e 2 and an antenna working frequency band; obtaining the real-time average brightness temperature of the moon according to moon observation data of Chang'e 2; and then the G / T value of the receiving system is obtained through calculation, and automatic testing of the G / T value of the receiving system is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic testing of satellite ground stations, in particular to a satellite receiving system G / T value automatic testing method, device, medium and product; the method solves the method of automatically testing the G / T value of the Ka frequency band of the satellite ground station receiving system by obtaining the angular dispersion coefficient of the moon. BACKGROUND

[0002] The statements in this section merely provide background information related to the present disclosure and can not constitute the prior art.

[0003] At present, in the performance index testing of satellite ground stations, when testing the G / T value of the Ka frequency band system, the indirect method is generally used, that is, the gain G of the antenna system and the noise temperature T of the receiving system are tested respectively. The test process of the indirect method is relatively complex and cannot be automated.

[0004] The automatic testing of the system G / T value is usually carried out in the form of moon by using the radio source direct method. The direct method mainly measures the power of the radio source and the cold space power to obtain the factor, and calculates the system G / T value through the factor. The moon is a good measurement radio source, and its power flux can be ignored with respect to time, frequency and polarization, and only the atmospheric correction coefficient and the radio source angular dispersion coefficient need to be considered in the calculation. This method has been relatively mature in S and X band systems. Since the beam width of the S and X band is comparable to the angular diameter of the moon, the can be ignored in the calculation process. However, when the system operating frequency band is expanded to the Ka band, the beam width of the Ka band is much smaller than that of the S and X bands, so the must be considered in the calculation. However, the brightness temperature distribution of the radio source and the directional diagram of the ground station antenna system are related, and due to the uncertainty of the test time, the real-time brightness temperature distribution of the moon needs to be obtained when the moon is automatically tested.

[0005] In summary, in order to solve the problem of automatic testing of the G / T value of the Ka frequency band of the ground station system, it is necessary to propose a method for real-time acquisition of the angular dispersion coefficient of the moon, and to realize the automatic testing of the G / T value of the Ka frequency band of the system by using the radio source direct method. SUMMARY

[0006] The purpose of the present application is to provide a satellite receiving system G / T value automatic testing method, device, medium and product, which first uses the radio source direct method test process to obtain the Factors; atmospheric correction factors are calculated based on environmental parameters measured at ground stations. Using lunar observation data from Chang'e-2 and the antenna's operating frequency band, the real-time angular diffusion coefficient of the radio source was obtained. The system utilizes real-time lunar average brightness temperature data from Chang'e-2 to obtain the G / T value of the receiving system, and then automatically tests the G / T value of the receiving system, thereby solving the aforementioned problems.

[0007] The technical solution of the present invention is as follows: An automatic testing method for the GT value of a satellite receiving system includes: Step S1: Obtain the results using the direct method of radio source testing. factor; Step S2: Calculate the atmospheric correction factor based on the environmental parameters measured by the ground station. ; Step S3: Using the lunar observation data from Chang'e-2 and the antenna's operating frequency band, obtain the real-time angular diffusion coefficient of the radio source. ; Step S4: Obtain the real-time average lunar brightness temperature using data from Chang'e-2's lunar observations; Step S5: Based on the results obtained in step S1 Factors, obtained from step S2 The result of step S3 The average lunar brightness temperature obtained in step S4 is used to calculate the Ka-band G / T value of the receiving system.

[0008] Further, step S1 includes: The direct radio source method was used for testing, in which the antenna was guided to point at the moon and the received power level was recorded. Then point to the cold air and record the cold air power level. Seeking factor.

[0009] Further, step S2 includes: Based on environmental data obtained from meteorological observation equipment at the ground station during the test, and in conjunction with the antenna's operating frequency and elevation angle, atmospheric correction factors were calculated using the ITU standard model. .

[0010] Further, step S3 includes: Using lunar observation data from Chang'e-2 and the variation patterns of lunar brightness temperature, the real-time lunar brightness temperature distribution was obtained. Furthermore, the antenna radiation pattern was fitted based on the antenna's operating frequency, thereby obtaining the real-time angular diffusion coefficient of the radio source. .

[0011] Further, step S4 includes: According to the real-time lunar brightness temperature distribution obtained in step S3, the real-time lunar average brightness temperature is calculated.

[0012] Further, the G / T value in step S5 is calculated by the following formula:

[0013] Wherein: The ratio of the noise power received when the antenna points to the radio source and the noise power received when pointing to the background sky at the same elevation angle: The lunar average brightness temperature is represented by Tm: The lunar angular inclination observed by the ground station is represented by θm: The atmospheric attenuation correction coefficient is represented by K: The lunar angular extension correction coefficient is represented by K:

[0014] Further, the environmental data includes humidity, atmospheric pressure, and temperature data.

[0015] The present application also provides an electronic device, comprising: At least one processor; and a memory connected in communication with the at least one processor; Wherein, the memory stores instructions executable by the at least one processor, and the at least one processor executes the instructions stored in the memory, so that the at least one processor executes the satellite receiving system GT value automatic test method as described above.

[0016] The present application also provides a computer terminal storage medium, which stores computer terminal executable instructions, and the computer terminal executable instructions are used to execute the satellite receiving system GT value automatic test method as described above.

[0017] The present application also provides a computer program product, which is executed by a processor to realize the satellite receiving system GT value automatic test method as described above.

[0018] Compared with the prior art, the present application has the following beneficial effects: 1. The traditional Ka frequency band system can only use the indirect method of "measuring G first and then measuring T", which has many manual links, long time consumption, and large error accumulation. The present application automatically completes the calculation of the G / T value in the existing radio source direct method framework by introducing the Chang'e-2 lunar observation data, the factor, , And the synchronous acquisition and calculation of the average brightness temperature of the moon, the whole test process is controlled by software closed loop, the test time is shortened from several hours to minutes.

[0019] 2, the use of Chang'e-2 high-resolution lunar brightness distribution, combined with the current antenna pattern, dynamic generation and test time, antenna pointing accurate matching of angular dispersion coefficient , eliminating the traditional experience of 0.3-0.5 dB system error. Based on the field meteorological data and ITU standard model, the atmospheric attenuation is corrected, and the additional 0.1-0.2 dB deviation caused by the use of annual average value is avoided.

[0020] 3, without the need for external calibration tower, unmanned aerial vehicle or auxiliary beacon, only using natural radio source-the moon can complete the test, reduce the purchase of special test equipment and manpower investment, especially suitable for remote areas or unattended station. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A flow chart of a satellite receiving system GT value automatic test method; Figure 2 A structure schematic view of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] It should be noted that the terms "first" and "second" and the like such relational terms are merely used to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0023] The features and performances of the present application will be further described in detail below in conjunction with the embodiments.

[0024] Embodiment one At present, in the performance index test of satellite ground station, the indirect method is generally used for G / T value test of Ka band system, that is, the gain G of antenna system and the noise temperature T of receiving system are tested respectively. The test process of indirect method is more complex and cannot be automated.

[0025] The automated testing of the system's G / T value is typically conducted monthly using the direct method with the radio source. The direct method primarily involves measuring the power of the radio source and the cooling air power to determine the value. Factors, and through The G / T value is calculated using a factor system. Since the moon is a good source of radio energy for measurement, the effects of time, frequency, and polarization on its power flux can be disregarded; only atmospheric correction factors need to be considered in the calculation. and the angular diffusion coefficient of the radio source This method is already quite mature in S and X band systems. Since the beamwidth of the S and X bands is comparable to the angular diameter of the moon, it can be disregarded in the calculation process. However, when the system's operating frequency band is extended to the Ka band, the beamwidth of the Ka band is much smaller than that of the S and X bands, therefore, it must be considered in the calculations. .and Related to the brightness temperature distribution of the radio source and the radiation pattern of the ground station antenna system, due to the uncertainty of the test time, it is also necessary to obtain the real-time brightness temperature distribution of the moon when using automatic lunar testing in practice.

[0026] In summary, to address the issue of automated testing of the G / T value in the Ka band of ground station systems, it is necessary to propose a method for real-time acquisition of the lunar angular diffusion coefficient. The method utilizes the direct method of radio source to automatically test the G / T value of the system in the Ka band.

[0027] Therefore, this embodiment proposes an automatic testing method for the lunar GT value in the Ka band of a satellite receiving system based on Chang'e-2 data. The method first employs a direct radio source method to obtain the GT value. Factors; atmospheric correction factors are calculated based on environmental parameters measured at ground stations. Using lunar observation data from Chang'e-2 and the antenna's operating frequency band, the real-time angular diffusion coefficient of the radio source was obtained. The real-time average lunar brightness temperature was obtained using data from Chang'e-2's lunar observations; then, the G / T value of the receiving system was calculated, and the automatic testing of the G / T value of the receiving system was completed.

[0028] In this embodiment, for details, please refer to... Figure 1 A method for automatically testing the lunar GT value in the Ka band of a satellite receiving system based on Chang'e-2 data, specifically including the following steps: Step S1: Obtain the results using the direct method of radio source testing. factor; In this embodiment, specifically, step S1 includes: The direct radio source method was used for testing, in which the antenna was guided to point at the moon and the received power level was recorded. , re-directing the cold air and recording the cold air power level , obtaining factors.

[0029] Step S2: calculating atmospheric correction coefficient according to the environmental parameters measured by the ground station ; In this embodiment, specifically, the step S2 comprises: According to the humidity, atmospheric pressure, temperature data and other data obtained by the meteorological observation equipment of the ground station, the atmospheric correction coefficient is calculated by using the ITU standard model in cooperation with the antenna operating frequency point and the antenna operating elevation angle .

[0030] Step S3: obtaining real-time radio source angular diffusion coefficient by using Chang'e-2 lunar observation data and antenna operating frequency band ; In this embodiment, specifically, the step S3 comprises: The real-time lunar brightness temperature distribution is obtained by using Chang'e-2 lunar observation data and the variation law of lunar brightness temperature, and the antenna directional diagram is fitted according to the antenna operating frequency point, and then the real-time radio source angular diffusion coefficient is obtained .

[0031] Step S4: obtaining real-time lunar average brightness temperature by using Chang'e-2 lunar observation data In this embodiment, specifically, the step S4 comprises: The real-time lunar average brightness temperature is calculated according to the real-time lunar brightness temperature distribution obtained in step S3.

[0032] Step S5: calculating the Ka-band G / T value of the receiving system based on the factor obtained in step S1, the atmospheric correction coefficient obtained in step S2, the radio source angular diffusion coefficient obtained in step S3 and the lunar average brightness temperature obtained in step S4.

[0033] In this embodiment, specifically, the G / T value in step S5 is calculated by the following formula:

[0034] Wherein: represents the ratio of the noise power received when the antenna is directed to the radio source to the noise power received when the antenna is directed to the background sky at the same elevation angle, i.e. the factor obtained in step S1; represents the lunar average brightness temperature, i.e. the lunar average brightness temperature obtained in step S4; represents the angular inclination of the moon observed by the ground station; represents the atmospheric attenuation correction coefficient, i.e. the atmospheric correction coefficient obtained in step S2 ; represents the angular spread correction coefficient of the moon, i.e. the radio source angular spread coefficient obtained in step S3 .

[0035] Based on the same technical concept, the embodiments of the present application further provide an electronic device which can implement the satellite receiving system GT value automatic test method provided by the above-mentioned embodiments of the present application. In an embodiment, the electronic device can be a server, a terminal device or other electronic device. As shown in Figure 2 , the electronic device can include: at least one processor and a memory connected with the at least one processor, and the specific connection medium between the processor and the memory is not limited in the embodiments of the present application, Figure 2 and the connection between the processor and the memory is taken as an example of connection through a bus in the embodiments of the present application. The bus is represented by a thick line in Figure 2 , and the connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc., and for the convenience of representation, Figure 2 only one thick line is used in the embodiments of the present application, but it does not mean that there is only one bus or only one type of bus. Alternatively, the processor can also be referred to as a controller, and the name is not limited.

[0036] In the embodiments of the present application, the memory stores instructions executable by the at least one processor, and the at least one processor can execute the satellite receiving system GT value automatic test method discussed above by executing the instructions stored in the memory. The processor can implement the functions of various modules in the device as shown in Figure 2 .

[0037] Among them, the processor is the control center of the device, and can utilize various interfaces and lines to connect each part of the entire control device, and through the running or execution of the instructions stored in the memory and the calling of the data stored in the memory, the various functions and processing data of the device, so as to overall monitor the device.

[0038] In an alternative design, the processor can include one or more processing units, and the processor can integrate an application processor and a modem processor, wherein the application processor mainly processes operating systems, user interfaces, and application programs, and the modem processor mainly processes wireless communications. It can be understood that the above-mentioned modem processor can also not be integrated into the processor. In some embodiments, the processor and the memory can be implemented on the same chip, and in some embodiments, they can also be implemented on separate chips, respectively.

[0039] The processor can be a general processor, such as a CPU, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, and can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor. The steps of the satellite receiving system GT value automatic testing method disclosed in the embodiments of the present application can be directly embodied as hardware processor execution or executed by a combination of hardware and software modules in the processor.

[0040] The memory is a non-volatile computer readable storage medium, which can be used to store non-volatile software programs, non-volatile computer executable programs and modules. The memory can include at least one type of storage medium, such as flash memory, hard disk, multimedia card, card type memory, random access memory (RAM), static random access memory (SRAM), programmable read only memory (PROM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic memory, magnetic disk, optical disk, etc. The memory is any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited to this. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing the storage function, used for storing program instructions and / or data.

[0041] By designing and programming the processor, the code corresponding to the satellite receiving system GT value automatic testing method introduced in the above embodiments can be fixed into the chip, so that the chip can execute the steps of the method of the above embodiments when running. How to design and program the processor is a technology known to those skilled in the art, which will not be described here.

[0042] Based on the same inventive concept, the embodiments of the present application also provide a storage medium, which stores computer instructions, when the computer instructions are run on a computer, the computer instructions make the computer execute the satellite receiving system GT value automatic test method discussed above.

[0043] In some optional embodiments, the various aspects of the satellite receiving system GT value automatic test method can also be implemented in the form of a program product, which includes program codes, when the program product is run on a device, the program codes are used to make the control device execute the steps of the satellite receiving system GT value automatic test method according to various exemplary embodiments of the present application described above.

[0044] It should be noted that although several units or sub-units of the device are mentioned in the above detailed description, such division is only exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided into multiple units for embodiment. In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that the operations must be performed in this specific order, or that all of the illustrated operations must be performed to achieve the desired result. Additionally or alternatively, certain steps can be omitted, a plurality of steps can be combined into one step, and / or one step can be divided into a plurality of steps.

[0045] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0046] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as a combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions described in the flowcharts and / or block diagrams. Figure 1 The flow or multiple flows and / or blocksFigure 1 A device that provides the functions specified in one or more boxes.

[0047] Program code for performing the operations of this invention can be written using any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0048] In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0049] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0050] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0051] Based on the same inventive concept, embodiments of the present invention also provide a computer program product, which, when executed by a processor, implements the above-described automatic test method for GT value of a satellite receiving system.

[0052] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

[0053] This Background section is intended to provide a general overview of the context of the application, the work of the current named inventors, to the extent the work is associated with the present application, and the work of others in the field of the application to the extent the work is associated with the present application, and to the extent the work described in this section is associated with the present application, neither expressly nor impliedly, is admitted to be prior art to the present application.

Claims

1. A method for automatically testing a GT value of a satellite receiving system, characterized by, The method comprises the following steps: Step S1: Direct method of radio source to test the flow process to obtain Factor; Step S2: calculating the atmospheric correction coefficient according to the environment parameters measured by the ground station ; Step S3: Obtain real-time radio source angular diffusion coefficient by using Chang'e-2 lunar observation data and antenna operating frequency band ; Step S4: obtaining real-time average lunar brightness temperature by using Chang'e-2 lunar observation data; Step S5: Calculate the Ka band G / T value of the receiving system based on the lunar average brightness temperature obtained in step S1 the factor obtained in step S2 the lunar average brightness temperature obtained in step S3 and the lunar average brightness temperature obtained in step S4 2. The method of claim 1, wherein the GT value of the satellite receiving system is automatically tested by the steps of: The step S1 comprises: Using the radio source direct method test procedure, the antenna is pointed at the moon and the received power level is recorded The antenna is then pointed at the cold source and the cold source power level is recorded The factor is then calculated The factor is then calculated 3. The method of claim 2, wherein the GT value of the satellite receiving system is automatically tested by: The step S2 comprises: According to the environmental data obtained by the meteorological observation equipment of the ground station during the test, the atmospheric correction coefficient is calculated by using the ITU standard model in combination with the antenna operating frequency and the antenna operating elevation angle .

4. The automatic testing method for GT value of a satellite receiving system according to claim 3, characterized in that, The step S3 comprises: Using Chang'e-2 lunar observation data and the variation law of lunar brightness temperature, the real-time brightness temperature distribution of the moon is obtained, and the antenna directional diagram is fitted according to the working frequency point of the antenna, and then the real-time radio source angular dispersion coefficient is obtained .

5. The method of claim 4, wherein the GT value is automatically tested by the satellite receiving system. The step S4 comprises: According to the real-time lunar brightness temperature distribution obtained in the step S3, the real-time average lunar brightness temperature is calculated.

6. The method of claim 5, wherein the GT value is automatically tested by the satellite receiving system. The G / T value in the step S5 is calculated by the following formula: Wherein: Tn = Tn(θ, φ) represents the ratio of the noise power received by the antenna when pointed at a radio source and the noise power received when pointed at the background sky at the same elevation angle: L represents the average lunar brightness temperature; denotes the lunar angular inclination observed by the ground station; represents the atmospheric attenuation correction coefficient; represents the angular extension correction factor of the moon.

7. The automatic test method for GT value of a satellite receiving system according to claim 3, characterized in that, The environmental data comprises humidity, atmospheric pressure and temperature data.

8. An electronic device, comprising: The method comprises the following steps: At least one processor; And a memory connected with the at least one processor in communication; Wherein, the memory stores instructions executable by the at least one processor, and the at least one processor executes the instructions stored in the memory, so that the at least one processor executes the satellite receiving system GT value automatic test method in any one of claims 1-7.

9. A computer terminal storage medium storing computer terminal executable instructions, characterized in that, The computer terminal executable instructions are used to execute the satellite receiving system GT value automatic test method in any one of claims 1-7.

10. A computer program product, characterised in that, The computer program is executed by the processor to realize the satellite receiving system GT value automatic test method in any one of claims 1-7.

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