A method and system for identifying energy-neutral atom source regions, a storage medium, and a terminal.

Abstract

This invention provides a method, system, storage medium, and terminal for identifying energy-neutral atom source regions. The method includes acquiring the ephemeris of a deep-space spacecraft in a geocentric solar ecliptic coordinate system; acquiring the field of view of an energy-neutral atom imaging unit within the deep-space spacecraft; acquiring the ephemeris of the Sun and Jupiter in a J2000-level ecliptic celestial reference system centered on the deep-space spacecraft; acquiring the position of the magnetopause in the geocentric solar ecliptic coordinate system; acquiring the coverage area of ​​the magnetopause in the J2000-level ecliptic celestial reference system centered on the deep-space spacecraft; and determining the source region of the energy-neutral atoms based on the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the magnetopause, and the ephemeris of the Sun and Jupiter. The energy-neutral atom source region identification method, system, storage medium, and terminal of this invention can distinguish between energy-neutral atoms from background interstellar sources, the foreground Earth's magnetosphere, and other source regions, offering speed, accuracy, and strong practicality.

Description

Technical Field

[0001] This invention relates to the technical field of in-situ detection in space and astronomy, and in particular to a method and system for identifying energy-neutral atom source regions, a storage medium, and a terminal. Background Technology

[0002] In the study and monitoring of the interstellar medium, measuring the global flux distribution and temporal variation of neutral atoms from the heliosphere boundary is of great significance and is also a challenging aspect of interstellar medium observation.

[0003] The detection of high-energy neutral atoms is one of the most important development trends in the field of international space exploration. Over the past decade, the Interstellar Boundary Explorer (IBEX) has conducted the first global observations of interstellar interactions near Earth's orbit. Its purpose is to study and analyze the global interactions between the solar wind and the interstellar medium, including heliosphere structure, dynamics, and the acceleration of high-energy particles, based on the detected all-sky flux distribution of background high-energy neutral atoms. During its operation, near perihelion, the Earth-orbiting spacecraft, located within Earth's magnetosphere, primarily observes high-energy neutral atoms originating from within the magnetosphere. When it reaches near apogee, having exited Earth's magnetosphere, it primarily observes high-energy neutral atoms originating from the heliosphere boundary.

[0004] Neutral atom detection technology and devices are cutting-edge and challenging topics in the field of space exploration. Zong Qiugang et al. (2021) provided a neutral atom imaging unit, imager, imaging method, and space exploration system. Zong Qiugang et al. (2019) provided a neutral atom detection noise reduction device that ensures the detector detects pure neutral atoms without contamination by ions. Wang Yongfu et al. (2021) developed a neutral atom imaging unit signal analysis method that can perform inversion imaging of neutral atom emission sources based on the detector response function and data signals obtained experimentally, obtaining information such as the intensity and size of the neutral atom emission sources. The above technologies, devices, and methods ensure the reliability of neutral atom imaging results.

[0005] Given that the detection of energy-neutral atoms is one of the most important development trends in the field of international space exploration, the technology of distinguishing between foreground and background energy-neutral atoms has also become a new development trend. For example, the IBEX research team has established separate databases for background and foreground energy-neutral atoms based on detection results. However, this technology is still under development and not yet mature. Accurately identifying energy-neutral atoms in different source regions is particularly important for studying the interaction between the heliosphere and the interstellar medium. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a method and system for identifying energy-neutral atom source regions, a storage medium and a terminal, which can distinguish energy-neutral atoms from background interstellar sources, the foreground Earth's magnetosphere and other source regions, and is fast, accurate and highly practical.

[0007] In a first aspect, the present invention provides a method for identifying energy-neutral atom source regions, comprising the following steps: obtaining the ephemeris of a deep spacecraft in a geocentric solar ecliptic coordinate system, wherein the deep spacecraft is used to detect energy-neutral atoms; obtaining the field of view of an energy-neutral atom imaging unit in the deep spacecraft based on the ephemeris of the deep spacecraft; obtaining the ephemeris of the Sun and Jupiter in a J2000-square ecliptic celestial reference system centered on the deep spacecraft; obtaining the position of the magnetopause in the geocentric solar ecliptic coordinate system based on a model of the Earth's magnetopause; obtaining the coverage area of ​​the magnetopause in a J2000-square ecliptic celestial reference system centered on the deep spacecraft based on the position of the magnetopause; and determining the source region of the energy-neutral atoms according to the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the magnetopause, and the ephemeris of the Sun and Jupiter.

[0008] In one implementation of the first aspect, obtaining the ephemeris of a deep spacecraft in a geocentric solar ecliptic coordinate system includes the following steps:

[0009] Obtain the ephemeris of the deep spacecraft;

[0010] The position of the deep spacecraft at different times is converted to the geocentric solar ecliptic coordinate system to obtain the ephemeris of the deep spacecraft in the geocentric solar ecliptic coordinate system.

[0011] In one implementation of the first aspect, obtaining the field of view of the energy-neutral atom imaging unit in the deep spacecraft based on the ephemeris of the deep spacecraft includes the following steps:

[0012] The field of view and sampling start and end times of the energy neutral atom imaging unit in the J2000 level ecliptic celestial reference frame centered on the deep space spacecraft are obtained; the field of view includes the right ascension and declination of the four vertices of the field of view in the J2000 level ecliptic celestial reference frame centered on the deep space spacecraft.

[0013] In one implementation of the first aspect, obtaining the ephemeris of the Sun and Jupiter in the J2000 level ecliptic celestial reference system centered on the deep spacecraft includes the following steps:

[0014] Obtain the ephemeris of the Sun and Jupiter;

[0015] The positions of the Sun and Jupiter at different times are converted to the J2000 level ecliptic celestial reference system centered on the deep spacecraft to obtain the ephemeris of the Sun and Jupiter in the J2000 level ecliptic celestial reference system centered on the deep spacecraft.

[0016] In one implementation of the first aspect, obtaining the position of the magnetopause in the geocentric solar ecliptic coordinate system based on the Earth's magnetopause model includes the following steps:

[0017] The solar wind parameters of the energy neutral atom imaging unit during the sampling start and end time are obtained; the solar wind parameters include solar wind velocity, solar wind proton density, and the magnitude and direction of the interplanetary magnetic field in the geocentric solar magnetosphere coordinate system;

[0018] The solar wind parameters are input into the Earth's magnetopause model to obtain the position of the magnetopause in the geocentric solar ecliptic coordinate system output by the Earth's magnetopause model.

[0019] In one implementation of the first aspect, obtaining the coverage area of ​​the magnetopause in the J2000 planar ecliptic reference frame centered on the deep space spacecraft, based on the position of the magnetopause, includes the following steps:

[0020] The position of the magnetopause in the geocentric solar ecliptic coordinate system is transformed to the J2000 plan ecliptic celestial reference system centered on the deep spacecraft, so as to obtain the coverage of the magnetopause in the J2000 plan ecliptic celestial reference system centered on the deep spacecraft.

[0021] In one implementation of the first aspect, determining the source region of the energy-neutral atom based on the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the magnetopause, and the ephemeris of the Sun and Jupiter includes the following steps:

[0022] In the J2000 flat ecliptic celestial reference frame centered on the deep spacecraft, the energy neutral atoms are visualized by Mohr-Weid projection, and the ephemeris of the Sun and Jupiter and the position of the magnetopause are projected onto the J2000 flat ecliptic celestial reference frame.

[0023] If the field of view of the energy neutral atom imaging unit does not overlap with the coverage of the magnetopause, then the detected energy neutral atoms are determined to originate from background interstellar sources.

[0024] If the field of view of the energy neutral atom imaging unit overlaps with the coverage of the magnetopause, then the detected energy neutral atoms are determined to be partly from the background interstellar source and partly from the foreground Earth magnetosphere.

[0025] If the field of view of the energy neutral atom imaging unit is blocked by the coverage of the magnetopause, then the detected energy neutral atoms are determined to originate from the foreground Earth magnetosphere.

[0026] If the field of view of the energy neutral atom imaging unit contains the ephemeris of Jupiter or the Sun, then it is determined that the detected energy neutral atoms partially originate from Jupiter or the Sun.

[0027] In a second aspect, the present invention provides an energy-neutral atom source region identification system, comprising a first acquisition module, a second acquisition module, a third acquisition module, a fourth acquisition module, a fifth acquisition module, and an identification module;

[0028] The first acquisition module is used to acquire the ephemeris of a deep spacecraft in the geocentric solar ecliptic coordinate system, wherein the deep spacecraft is used to detect energy neutral atoms;

[0029] The second acquisition module is used to acquire the field of view of the energy neutral atom imaging unit in the deep space spacecraft based on the ephemeris of the deep space spacecraft;

[0030] The third acquisition module is used to acquire the ephemeris of the Sun and Jupiter in the J2000 flat ecliptic celestial reference system centered on the deep spacecraft;

[0031] The fourth acquisition module is used to obtain the position of the magnetopause in the geocentric solar ecliptic coordinate system based on the Earth's magnetopause model;

[0032] The fifth acquisition module is used to acquire the coverage area of ​​the magnetopause in the J2000 flat ecliptic celestial reference system centered on the deep space spacecraft, based on the position of the magnetopause.

[0033] The identification module is used to determine the source region of the energy-neutral atom based on the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the Earth's magnetopause, and the ephemeris of the Sun and Jupiter.

[0034] Thirdly, the present invention provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for identifying energy-neutral atom source regions.

[0035] Fourthly, the present invention provides an energy-neutral atom source region identification terminal, comprising: a processor and a memory;

[0036] The memory is used to store computer programs;

[0037] The processor is used to execute the computer program stored in the memory, so that the energy-neutral atom source region identification terminal performs the above-described energy-neutral atom source region identification method.

[0038] As described above, the energy-neutral atom source region identification method and system, storage medium and terminal of the present invention have the following beneficial effects:

[0039] (1) It can distinguish between energy-neutral atoms from background interstellar sources, the foreground Earth magnetosphere, and other source regions, and has the characteristics of being dynamic, fast, and accurate;

[0040] (2) It provides a foundation for energy-neutral atom detection missions and helps in the formulation of subsequent detection schemes;

[0041] (3) It provides a basis for data processing of energy-neutral atom flux, which helps in the correct analysis and interpretation of measurement results and in the observation and study of the interaction between the interstellar medium and the solar wind. Attached Figure Description

[0042] Figure 1 The flowchart shown is an embodiment of the energy neutral atom source region identification method of the present invention;

[0043] Figure 2 The diagram shown is a schematic representation of an embodiment of the present invention for obtaining the ephemeris of a deep spacecraft in the geocentric solar ecliptic coordinate system;

[0044] Figure 3 The diagram shown is a schematic representation of the field of view information of a deep spacecraft imaging unit in one embodiment of the present invention;

[0045] Figure 4 This diagram illustrates, in one embodiment, the field-of-view information of multiple imaging units used by a deep-space spacecraft to complete a full-sky imaging operation according to the present invention.

[0046] Figure 5 The diagram shows the right ascension and declination of the four vertices of the field of view of each imaging unit in a single all-sky imaging process in the J2000 heliocentric ecliptic celestial reference frame in one embodiment.

[0047] Figure 6 The diagram shows the field of view of each imaging unit in the J2000 heliocentric ecliptic celestial reference frame in one embodiment of the present invention.

[0048] Figure 7 This is a schematic diagram illustrating an embodiment of the present invention, showing the conversion of the ephemeris of the Sun and Jupiter into positional information in the J2000 flat ecliptic celestial reference system centered on the spacecraft.

[0049] Figure 8 This is a schematic diagram illustrating an embodiment of the present invention, which involves accessing the OMNI solar wind parameter public database to obtain solar wind velocity, solar wind proton density, and the magnitude and direction of the interplanetary magnetic field in the geocentric solar magnetosphere coordinate system.

[0050] Figure 9 This invention will be shown as Figure 10 The obtained solar wind parameters are input into a data-driven empirical magnetopause model to obtain a schematic diagram of the position of the magnetopause in the geocentric solar ecliptic coordinate system and the position of the satellite in its orbit in one embodiment;

[0051] Figure 10 The diagram shows a schematic representation of an embodiment of the present invention, which transforms the position of the magnetopause in the geocentric solar ecliptic coordinate system to the J2000 flat ecliptic celestial reference system centered on the deep spacecraft, and obtains the coverage area of ​​the magnetopause in the J2000 flat ecliptic celestial reference system.

[0052] Figure 11 The diagram shows the output results of each imaging unit in this invention determining the energy-neutral atom source region in one embodiment.

[0053] Figure 12 The diagram shown is a structural schematic of the energy neutral atom source region identification system of the present invention in one embodiment.

[0054] Figure 13 The diagram shown is a structural schematic of the energy neutral atom source region identification terminal of the present invention in one embodiment. Detailed Implementation

[0055] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0056] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0057] The energy neutral atom source region identification method, system, storage medium, and terminal of this invention can distinguish energy neutral atoms from background interstellar sources, the foreground Earth's magnetosphere, and other source regions. They are fast and accurate, providing a foundation for energy neutral atom detection missions and are highly practical.

[0058] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0059] like Figure 1 As shown, in one embodiment, the energy-neutral atom source region identification method of the present invention includes the following steps:

[0060] Step S1: Obtain the ephemeris of the deep spacecraft in the geocentric solar ecliptic coordinate system. The deep spacecraft is used to detect energy-neutral atoms.

[0061] Specifically, deep space exploration refers to exploration that escapes Earth's gravitational field and enters the solar system and outer space. Deep space spacecraft are those used to accomplish deep space exploration. Ephemeris, in GPS measurements, is a precise table of the changing positions or trajectories of celestial bodies over time; it is a function of time. The geocentric solar ecliptic system (GSE) is used to represent satellite orbits, interplanetary magnetic fields, and solar wind speeds. In this rectangular coordinate system, the origin is located at the Earth's center, the Xse axis points to the Sun, the Zse axis is perpendicular to the ecliptic and faces north, and the Yse axis points to the twilight side (the opposite direction of Earth's revolution around the Sun), completing a right-handed coordinate system.

[0062] In this invention, for a deep-space probe used to detect neutral atoms, its ephemeris in the geocentric solar ecliptic coordinate system is obtained. First, the ephemeris of the deep-space spacecraft is obtained; then, the position of the deep-space spacecraft at different times is transformed to the geocentric solar ecliptic coordinate system to obtain the ephemeris of the deep-space spacecraft in the geocentric solar ecliptic coordinate system. Preferably, the ephemeris of the deep-space spacecraft is obtained from an existing publicly available database of neutral atoms.

[0063] In one embodiment, a neutral-energy atom deep-space spacecraft is defined, and its orbital elements at a certain moment are preset. The parameters are set as follows:

[0064] Time: January 1, 2015, 00:00:00

[0065] Semi-long wheelbase: 184,118 km

[0066] Eccentricity: 0.738016

[0067] Inclination angle: 28.5°

[0068] Right ascension of ascending node: 0°

[0069] Perigee angle: 120°

[0070] True nearest angle: 0°

[0071] Based on the orbital elements of the aforementioned neutral-energy atom deep-space spacecraft, calculate the ephemeris of the spacecraft in the Earth-Sun ecliptic coordinate system within one orbital period after 00:00:00 on December 21, 2015. Figure 2 As shown.

[0072] Step S2: Based on the ephemeris of the deep spacecraft, obtain the field of view of the energy neutral atom imaging unit in the deep spacecraft.

[0073] Specifically, the field of view and sampling start and end times of the energy-neutral atom imaging unit in the J2000 mean ecliptic celestial reference frame centered on the deep spacecraft are obtained. The field of view includes the right ascension and declination of the four vertices of the field of view in the J2000 mean ecliptic celestial reference frame centered on the deep spacecraft. The J2000 mean ecliptic celestial reference frame is defined as follows: the x-axis points to the mean vernal equinox of J2000, the z-axis is perpendicular to the ecliptic plane of J2000 and points to the North Pole, and the y-axis, x-axis, and z-axis form a right-handed frame.

[0074] Each imaging unit of the deep spacecraft is configured with a 2.5° x 2.5° field of view, simultaneously imaging and observing the entire 4π spherical dimension. A satellite-specific xyz coordinate system is defined. The z-direction always points towards the center of the sun, the x-direction is defined as the western side of the sun perpendicular to the z-axis within the ecliptic plane, and the y-axis forms a right-handed coordinate system with the x and z axes. Therefore, the angles between the directions of the four vertices of the field of view and the z-axis are defined as the elevation angles. The angles between the projection directions of the four vertices of the field of view onto the xy-plane and the x-axis are defined as the azimuth angles. The azimuth and elevation angles of the four vertices of the field of view relative to the instrument coordinate axes for each imaging unit are as follows: Figure 3 As shown, its visualization results are as follows: Figure 4 As shown. Then, the right ascension and declination coordinates of the four vertices in the J2000 level ecliptic celestial reference frame centered on the spacecraft are as follows: Figure 5 As shown. Its visual diagram is as follows. Figure 6 As shown.

[0075] Step S3: Obtain the ephemeris of the Sun and Jupiter in the J2000 flat ecliptic celestial reference system centered on the deep spacecraft.

[0076] Specifically, the ephemeris of the Sun and Jupiter can be obtained by accessing publicly available databases of solar system objects. A commonly used publicly available database of solar system objects is the JPL Horizons online solar system data and emphemeris computation service, provided by the Jet Propulsion Laboratory (JPL), https: / / ssd.jpl.nasa.gov / horizons / . This database can be downloaded to a local workstation for use. Alternatively, the ephemeris of the Sun and Jupiter in the J2000 heliocentric ecliptic reference system can also be read using the ephem module of the Python package Poliastro.

[0077] Then, using the Python package astropy, the positions of the Sun and Jupiter at different times are converted to the J2000 mean ecliptic celestial reference system centered on the deep spacecraft. This allows the acquisition of the ephemeris of the Sun and Jupiter in the J2000 mean ecliptic celestial reference system centered on the deep spacecraft. Figure 7 As shown.

[0078] Step S4: Obtain the position of the magnetopause in the geocentric solar ecliptic coordinate system based on the Earth's magnetopause model.

[0079] Specifically, firstly, by accessing the space physics database of the Goddard Space Flight Center (https: / / cdaweb.gsfc.nasa.gov), the solar wind parameters of the energy-neutral atom imaging unit during the sampling start and end time were obtained, and the solar wind density, solar wind velocity, and the magnitude and direction of the interplanetary magnetic field in the geocentric solar magnetosphere coordinate system were extracted. Assuming that the magnetosphere apex type remains unchanged within one orbital period, the average solar wind parameters within one orbital period were calculated, such as... Figure 8 As shown. Next, using the magnetopause model of Chao et al. (2000), with solar wind parameters as input, the three-dimensional magnetopause position in the geocentric solar ecliptic coordinate system is obtained, as shown. Figure 9 As shown.

[0080] Step S5: Based on the position of the magnetopause, obtain the coverage area of ​​the magnetopause in the J2000 flat ecliptic celestial reference frame centered on the deep spacecraft.

[0081] Specifically, the position of the magnetopause in the geocentric solar ecliptic coordinate system is transformed to the J2000 planar ecliptic celestial reference system centered on the deep spacecraft using the Python package astropy, in order to obtain the coverage area of ​​the magnetopause in the J2000 planar ecliptic celestial reference system centered on the deep spacecraft, such as... Figure 10 As shown.

[0082] Step S6: Determine the source region of the energy neutral atom based on the field of view of the energy neutral atom imaging unit, the coverage area of ​​the magnetopause, and the ephemeris of the Sun and Jupiter.

[0083] First, in the J2000 flat ecliptic celestial reference frame centered on the deep spacecraft, the energy-neutral atoms are visualized using a Mohr-Weid projection, and the ephemeris of the Sun and Jupiter, as well as the position of the magnetopause, are projected onto the J2000 flat ecliptic celestial reference frame. The source region of the energy-neutral atoms is determined based on the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the magnetopause, and the relative positions of the ephemeris of the Sun and Jupiter. The source region results for each imaging unit are as follows: Figure 11 As shown.

[0084] Specifically, if the field of view of the neutral atom imaging unit does not overlap with the coverage area of ​​the magnetopause, the detected neutral atom is determined to originate from a background interstellar source. If the field of view of the neutral atom imaging unit intersects with the coverage area of ​​the magnetopause, the detected neutral atom is determined to originate partly from a background interstellar source and partly from the foreground Earth's magnetosphere. If the field of view of the neutral atom imaging unit is obscured by the coverage area of ​​the magnetopause, the detected neutral atom is determined to originate from the foreground Earth's magnetosphere. If the field of view of the neutral atom imaging unit includes the ephemeris of Jupiter or the Sun, the detected neutral atom is determined to originate partly from Jupiter or the Sun.

[0085] It should be noted that the scope of protection of the energy neutral atom source region identification method described in the embodiments of the present invention is not limited to the execution order of the steps listed in this embodiment. Any solution implemented by adding, subtracting, or replacing steps in the prior art based on the principles of the present invention is included within the scope of protection of the present invention.

[0086] like Figure 12 As shown, in one embodiment, the energy-neutral atom source region identification system of the present invention includes a first acquisition module 121, a second acquisition module 122, a third acquisition module 123, a fourth acquisition module 124, a fifth acquisition module 125 and an identification module 126.

[0087] The first acquisition module 121 is used to acquire the ephemeris of a deep spacecraft in the geocentric solar ecliptic coordinate system, wherein the deep spacecraft is used to detect energy neutral atoms.

[0088] The second acquisition module 122 is connected to the first acquisition module 121 and is used to acquire the field of view of the energy neutral atom imaging unit in the deep space spacecraft based on the ephemeris of the deep space spacecraft.

[0089] The third acquisition module 123 is used to acquire the ephemeris of the Sun and Jupiter in the J2000 level ecliptic celestial reference system centered on the deep spacecraft.

[0090] The fourth acquisition module 124 is used to acquire the position of the magnetopause in the geocentric solar ecliptic coordinate system based on the Earth's magnetopause model.

[0091] The fifth acquisition module 125 is connected to the fourth acquisition module 124 and is used to acquire the coverage area of ​​the magnetopause in the J2000 flat ecliptic celestial reference system centered on the deep space spacecraft, based on the position of the magnetopause.

[0092] The identification module 126 is connected to the second acquisition module 122, the third acquisition module 123 and the fifth acquisition module 125, and is used to determine the source region of the energy neutral atom based on the field of view of the energy neutral atom imaging unit, the coverage of the Earth's magnetopause, and the ephemeris of the Sun and Jupiter.

[0093] The structure and principle of the first acquisition module 121, the second acquisition module 122, the third acquisition module 123, the fourth acquisition module 124, the fifth acquisition module 125 and the identification module 126 correspond one-to-one with the steps in the above-mentioned method for identifying the source region of energy-neutral atoms, so they will not be described in detail here.

[0094] It should be noted that the division of the various modules in the above device is merely a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, these modules can be implemented entirely in software via processing element calls; they can be fully implemented in hardware; or some modules can be implemented by processing element calls to software, while others are implemented in hardware. For example, module x can be a separate processing element, or it can be integrated into a chip in the above device. Alternatively, it can be stored as program code in the memory of the above device, and its function can be called and executed by a processing element of the device. The implementation of other modules is similar. Moreover, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element mentioned here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed through the integrated logic circuits in the hardware of the processor element or through software instructions.

[0095] For example, these modules can be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs). As another example, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together to form a system-on-a-chip (SOC).

[0096] The storage medium of this invention stores a computer program, which, when executed by a processor, implements the aforementioned method for identifying energy-neutral atom source regions. The storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disk, USB flash drive, memory card, or optical disk.

[0097] like Figure 13 As shown, in one embodiment, the energy neutral atom source region identification terminal of the present invention includes a processor 131 and a memory 132.

[0098] The memory 132 is used to store computer programs.

[0099] The memory 132 includes various media capable of storing program code, such as ROM, RAM, magnetic disk, USB flash drive, memory card, or optical disk.

[0100] The processor 131 is connected to the memory 132 and is used to execute the computer program stored in the memory 132 so that the energy neutral atom source region identification terminal performs the above-described energy neutral atom source region identification method.

[0101] Preferably, the processor 131 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0102] In summary, the method, system, storage medium, and terminal for identifying energy-neutral atom source regions of the present invention can distinguish energy-neutral atoms from background interstellar sources, the foreground Earth's magnetosphere, and other source regions, exhibiting dynamic, rapid, and accurate characteristics. It provides a foundation for energy-neutral atom detection missions, aiding in the formulation of subsequent detection schemes; it also provides a foundation for data processing of energy-neutral atom flux, facilitating the correct analysis and interpretation of measurement results, and contributing to the observation and research of the interaction between the interstellar medium and the solar wind. Therefore, the present invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0103] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for identifying energy-neutral atom source regions, characterized in that: Includes the following steps: Obtain the ephemeris of a deep-space spacecraft in a geocentric solar ecliptic coordinate system, the deep-space spacecraft being used to detect energy-neutral atoms; Based on the ephemeris of the deep spacecraft, the field of view of the energy neutral atom imaging unit in the deep spacecraft is obtained; Obtain the ephemeris of the Sun and Jupiter in the J2000 level ecliptic celestial reference system centered on the deep spacecraft; The position of the magnetopause in the geocentric solar ecliptic coordinate system is obtained based on the Earth's magnetopause model; Based on the position of the magnetopause, the coverage area of ​​the magnetopause in the J2000 flat ecliptic celestial reference frame centered on the deep spacecraft is obtained; The source region of the energy-neutral atom is determined based on the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the magnetopause, and the ephemeris of the Sun and Jupiter.

2. The method for identifying energy-neutral atom source regions according to claim 1, characterized in that: Obtaining the ephemeris of a deep spacecraft in the geocentric solar ecliptic coordinate system includes the following steps: Obtain the ephemeris of the deep spacecraft; The position of the deep spacecraft at different times is converted to the geocentric solar ecliptic coordinate system to obtain the ephemeris of the deep spacecraft in the geocentric solar ecliptic coordinate system.

3. The method for identifying energy-neutral atom source regions according to claim 1, characterized in that: Obtaining the field of view of the neutral atom imaging unit in the deep spacecraft based on its ephemeris includes the following steps: The field of view and sampling start and end times of the energy neutral atom imaging unit in the J2000 level ecliptic celestial reference frame centered on the deep space spacecraft are obtained; the field of view includes the right ascension and declination of the four vertices of the field of view in the J2000 level ecliptic celestial reference frame centered on the deep space spacecraft.

4. The method for identifying energy-neutral atom source regions according to claim 1, characterized in that: Obtaining the ephemeris of the Sun and Jupiter in the J2000 level ecliptic celestial reference system centered on the deep spacecraft includes the following steps: Obtain the ephemeris of the Sun and Jupiter; The positions of the Sun and Jupiter at different times are converted to the J2000 level ecliptic celestial reference system centered on the deep spacecraft to obtain the ephemeris of the Sun and Jupiter in the J2000 level ecliptic celestial reference system centered on the deep spacecraft.

5. The method for identifying energy-neutral atom source regions according to claim 1, characterized in that: The steps involved in determining the position of the magnetopause in the geocentric solar ecliptic coordinate system based on the Earth's magnetopause model are as follows: The solar wind parameters of the energy neutral atom imaging unit during the sampling start and end time are obtained; the solar wind parameters include solar wind velocity, solar wind proton density, and the magnitude and direction of the interplanetary magnetic field in the geocentric solar magnetosphere coordinate system; The solar wind parameters are input into the Earth's magnetopause model to obtain the position of the magnetopause in the geocentric solar ecliptic coordinate system output by the Earth's magnetopause model.

6. The method for identifying energy-neutral atom source regions according to claim 1, characterized in that: Based on the location of the magnetopause, obtaining the coverage area of ​​the magnetopause in the J2000 plan ecliptic celestial reference frame centered on the deep spacecraft includes the following steps: The position of the magnetopause in the geocentric solar ecliptic coordinate system is transformed to the J2000 plan ecliptic celestial reference system centered on the deep spacecraft, so as to obtain the coverage of the magnetopause in the J2000 plan ecliptic celestial reference system centered on the deep spacecraft.

7. The method for identifying energy-neutral atom source regions according to claim 1, characterized in that: Determining the source region of the energy-neutral atom based on the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the magnetopause, and the ephemeris of the Sun and Jupiter includes the following steps: In the J2000 flat ecliptic celestial reference frame centered on the deep spacecraft, the energy neutral atoms are visualized by Mohr-Weid projection, and the ephemeris of the Sun and Jupiter and the position of the magnetopause are projected onto the J2000 flat ecliptic celestial reference frame. If the field of view of the energy neutral atom imaging unit does not overlap with the coverage of the magnetopause, then the detected energy neutral atoms are determined to originate from background interstellar sources. If the field of view of the energy neutral atom imaging unit overlaps with the coverage of the magnetopause, then the detected energy neutral atoms are determined to be partly from the background interstellar source and partly from the foreground Earth magnetosphere. If the field of view of the energy neutral atom imaging unit is blocked by the coverage of the magnetopause, then the detected energy neutral atoms are determined to originate from the foreground Earth magnetosphere. If the field of view of the energy neutral atom imaging unit contains the ephemeris of Jupiter or the Sun, then it is determined that the detected energy neutral atoms partially originate from Jupiter or the Sun.

8. A neutral atom source region identification system, characterized in that: It includes a first acquisition module, a second acquisition module, a third acquisition module, a fourth acquisition module, a fifth acquisition module, and an identification module; The first acquisition module is used to acquire the ephemeris of a deep spacecraft in the geocentric solar ecliptic coordinate system, wherein the deep spacecraft is used to detect energy neutral atoms; The second acquisition module is used to acquire the field of view of the energy neutral atom imaging unit in the deep space spacecraft based on the ephemeris of the deep space spacecraft; The third acquisition module is used to acquire the ephemeris of the Sun and Jupiter in the J2000 flat ecliptic celestial reference system centered on the deep spacecraft; The fourth acquisition module is used to obtain the position of the magnetopause in the geocentric solar ecliptic coordinate system based on the Earth's magnetopause model; The fifth acquisition module is used to acquire the coverage area of ​​the magnetopause in the J2000 flat ecliptic celestial reference system centered on the deep space spacecraft, based on the position of the magnetopause. The identification module is used to determine the source region of the energy-neutral atom based on the field of view of the energy-neutral atom imaging unit, the coverage area of ​​the Earth's magnetopause, and the ephemeris of the Sun and Jupiter.

9. A storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the energy-neutral atom source region identification method as described in any one of claims 1 to 7.

10. A terminal for identifying energy-neutral atom source regions, characterized in that, include: Processor and memory; The memory is used to store computer programs; The processor is used to execute the computer program stored in the memory, so that the energy-neutral atom source region identification terminal performs the energy-neutral atom source region identification method according to any one of claims 1 to 7.

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