A method and system for starfield simulation data

Abstract

The present application relates to the field of star map simulation data, and specifically to a star map simulation data method and system, which can simulate complete and accurate star map data, making up for the problem of missing real data and having important application value in related field research; the method for generating target star data can generate some difficult-to-obtain key information through simulation algorithms, improving the completeness and accuracy of the star map; the star map parameters can be dynamically adjusted as needed, providing a more flexible and convenient use mode; the provided system is simple and easy to use, stores and manages data through a database, provides convenient data query and management functions, and facilitates users to carry out related analysis and research.

Description

Technical Field

[0001] This invention relates to the field of star map simulation data, specifically to a method and system for simulating star map data. Background Technology

[0002] In astronomy, navigation, aerospace, and other fields, star charts are an important tool and data source. The accuracy and completeness of star chart information are crucial for research and applications in these fields. However, some star chart data is difficult to obtain due to accessibility or security restrictions, making it difficult to acquire truly complete data. Therefore, a method and system are needed to simulate complete and accurate star chart data. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for simulating star map data, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for simulating star map data, characterized by comprising the following steps:

[0005] Step S1: Select a subset of celestial bodies from a known complete star map database as the base data;

[0006] Step S2: Record and store the basic data of the selected celestial bodies in Step S1, including key information such as position, brightness, and color, into the database;

[0007] Step S3: Select a celestial body with similar basic data as the target celestial body;

[0008] Step S4: Based on the basic data of some celestial bodies recorded in Step S1, generate the position, brightness, and color information of the target celestial body;

[0009] Step S5: Using the information data from step S4, the fourth-order Runge-Kutta simulation algorithm is used to calculate and generate the orbital information of the target celestial body;

[0010] Step S6: Store the information of the target celestial body generated in steps S4 and S5 into the database;

[0011] Step S7: Determine the center point, field of view, and magnification parameters of the star chart based on observation requirements and telescope characteristics;

[0012] Step S8: Based on the center point, field of view, magnification parameters of the star map in Step S7, the basic data in Step S1, and the information of the target star in Step S5, calculate the position and size of the target star in the star map.

[0013] Step S9: Based on the star map parameters determined in step S8, display the basic data and target star information on the star map;

[0014] Step S10: Magnify and reduce the star map according to its magnification.

[0015] Preferably, the selected celestial bodies in step S1 specifically include the following requirements:

[0016] Uniform spatial distribution: Select celestial bodies with a uniform spatial distribution to avoid situations where the selected celestial bodies are too concentrated or too scattered.

[0017] High representativeness: The selected stars should represent the basic situation of the entire star chart database, including brightness, color, and position;

[0018] Similar to the target star: When selecting the base data for some stars, stars similar to the target star should be selected to generate complete and accurate star map data.

[0019] Preferably, the specific method for generating the position, brightness, and color information of the target star in step S4 based on the basic data of some celestial bodies recorded in step S1 is as follows:

[0020] Position information: The position information of the target celestial body is calculated based on the celestial coordinate system position, parallax, and proper motion information of some celestial bodies;

[0021] Brightness information: Calculate the brightness information of the target star based on information such as the luminosity and distance of some stars;

[0022] Color information: The color information of the target star is calculated based on the spectral and color index information of some stars.

[0023] Preferably, the specific steps for calculating the position information of the target celestial body based on the celestial coordinate system position, parallax, and proper motion information of a portion of the celestial bodies are as follows:

[0024] Step a: First, the equatorial coordinate system position of the celestial body needs to be converted to a rectangular coordinate system (xyz coordinates); that is, for a target celestial body, assume its right ascension is... Declination is Its coordinates x, y, z on the celestial sphere can be calculated using the following formula:

[0025] ;

[0026] ;

[0027] ;

[0028] Step b: When calculating the position of the target celestial body, parallax must be considered. Let π represent the parallax of the target celestial body. Then, the position of the target celestial body in the rectangular coordinate system can be calculated using the following formula:

[0029] ;

[0030] ;

[0031] ;

[0032] Step c: The angle between the observer's line of sight to the star on Earth and its trajectory, denoted by μ, can be used to calculate the position of the target celestial body using the following formula:

[0033] (Movement in the direction of right ascension)

[0034] (Movement in the direction of declination)

[0035] In the above formula, and These represent the right ascension and declination of the target celestial body after parallax correction;

[0036] Step d: By calculating the equatorial coordinates, parallax, and proper motion of the target celestial body through the above steps, its coordinate position (x, y, z) in the rectangular coordinate system can be calculated, thereby determining the position information of the target celestial body.

[0037] Preferably, the specific steps for calculating the brightness information of the target star based on the luminosity, distance, and other information of some celestial bodies are as follows:

[0038] First, let's assume the distance from the target celestial body to Earth is... (Using 10 parsecs as the basic unit), with an absolute magnitude of M, the apparent magnitude of a target celestial body in the field of view can be calculated using the following formula:

[0039]

[0040] Once the apparent magnitude of the target star is known, Wiener's theorem (also known as the law of conservation of energy) can be used to calculate the brightness of the target star. The brightness of the target star can be calculated using the following formula:

[0041]

[0042] in, It is the total radiant energy of the target celestial body. It is the distance from the target celestial body to Earth. It is the radiant flux per unit area of ​​the target celestial body, calculated based on the target celestial body's apparent magnitude and decolorization index:

[0043]

[0044] in, It is the radiant flux of the sun on the surface of the earth directly in front of it. It is a distance index, used to indicate that the farther away a target star is, the less bright it is. Calculated using the following basic formula:

[0045]

[0046] in, The wavelength dependence coefficient of the target star is closely related to its color. Its color index can be calculated by observing its brightness at different wavelengths.

[0047] Preferably, the step of calculating the color information of the target star based on the spectral and color index information of some celestial bodies specifically includes the following steps:

[0048] Step 1: Assume the target celestial body is in and The luminous flux within the bands are respectively and Then its The index can be calculated as follows: ;

[0049] in, It is the wavelength dependence coefficient of the celestial body itself. The index indicates the position of celestial bodies in the sky. bands and Brightness difference between bands The smaller the index, the more bluish the target star is; The higher the index, the redder the target star's color;

[0050] Step 2: Based on the target celestial body Indices are used to determine the color and effective temperature of celestial bodies, assuming the target celestial body is... The index is Its color temperature can be calculated using the following formula:

[0051]

[0052] in, This is the effective temperature of the sun's surface, approximately 3.76K. It is the effective surface temperature of the target celestial body;

[0053] The third step is to use the equatorial latitude reduction method for extinction correction, assuming the target celestial body is in... , , and The color index within the band is , , Extinction correction can then be performed using the following formula:

[0054] in, and These are the reddening constants of interstellar extinction, typically taken as... =3.1 and =1.7. It is interstellar extinction pair The correction factor for the index is obtained through spectral analysis of the target star and equatorial latitude reduction calculation.

[0055] Preferably, calculating the position and size of the target celestial body in the star chart in step S8 specifically includes:

[0056] Step S81: The right ascension of the target celestial body is known. and declination and the center point in the star chart Use the following formula to calculate the relative positions of celestial bodies in a star chart. :

[0057]

[0058] in, and These represent the horizontal and vertical positions of the target celestial body in the star chart, respectively, in pixels. This calculation formula uses trigonometric relationships in the celestial coordinate system to convert right ascension and declination into the relative positions of the target celestial body in the star chart.

[0059] Step S82: Given the position of the target celestial body on the celestial sphere and the pixel coordinates of the center point of the star map. The pixel coordinates of celestial bodies in a star map are calculated using the following formula. :

[0060]

[0061] in, and These represent the horizontal and vertical pixel coordinates of the celestial body in the star map, respectively. and This has already been calculated in the first step. This represents the rotation angle of the star chart, typically 0 degrees.

[0062] Step S83: Given the size and brightness of the target celestial body, as well as the parameters of the telescope and the response characteristics of the detector, calculate the size of the target celestial body in the image using the following formula:

[0063]

[0064] in, The size of the target celestial body in the image. The radius of the target celestial body. The pixel brightness of the target star. The focal length of the telescope is given, and the unit is pixels; the radius is given. Pixel brightness can be calculated based on the parallax or spectral characteristics of the target star. The focal length can be obtained by performing photometric analysis on the target celestial image. It can be determined based on the optical characteristics of the telescope and the resolution of the detector.

[0065] Preferably, a star map simulation data system includes a basic data module, a target celestial body generation module, a star map parameter determination module, a celestial body coordinate calculation module, a star map display module, and a database management module. The basic data module stores and manages basic data for some celestial bodies, including their position, brightness, and color. The target celestial body generation module generates data for target celestial bodies, including their position, brightness, and color. The star map parameter determination module determines the center point, field of view, and magnification parameters of the star map based on user needs and telescope characteristics. The celestial body coordinate calculation module calculates the position and size of these target celestial bodies in the star map based on the star map parameters, basic data, and target celestial body information. The star map display module displays the position, brightness, and size information of the target celestial bodies on the interface. The database management module stores and manages the generated celestial body data.

[0066] Compared with the prior art, the beneficial effects of the present invention are:

[0067] 1. This invention can simulate complete and accurate star map data, making up for some of the problems of missing real data, and has important application value in related research fields;

[0068] 2. The method for generating target celestial data in this invention can generate some key information that is difficult to obtain through simulation algorithms, thereby improving the completeness and accuracy of the star map;

[0069] 3. The star chart parameters of this invention can be dynamically adjusted as needed, providing a more flexible and convenient way of use;

[0070] 4. The system provided by this invention is simple and easy to use. It stores and manages data through a database, provides convenient data query and management functions, and facilitates users to conduct relevant analysis and research. Attached Figure Description

[0071] Figure 1 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0072] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0073] Please see Figure 1 The present invention provides a technical solution: a method for simulating star map data, comprising the following steps:

[0074] Step S1: Select a subset of celestial bodies from a known complete star map database as the base data;

[0075] Step S2: Record and store the basic data of the selected celestial bodies in Step S1, including key information such as position, brightness, and color, into the database;

[0076] Step S3: Select a celestial body with similar basic data as the target celestial body;

[0077] Step S4: Based on the basic data of some celestial bodies recorded in Step S1, generate the position, brightness, and color information of the target celestial body;

[0078] Step S5: Using the information data from step S4, the fourth-order Runge-Kutta simulation algorithm is used to calculate and generate the orbital information of the target celestial body;

[0079] Step S6: Store the information of the target celestial body generated in steps S4 and S5 into the database;

[0080] Step S7: Determine the center point, field of view, and magnification parameters of the star chart based on observation requirements and telescope characteristics;

[0081] Step S8: Based on the center point, field of view, magnification parameters of the star map in Step S7, the basic data in Step S1, and the information of the target star in Step S5, calculate the position and size of the target star in the star map.

[0082] Step S9: Based on the star map parameters determined in step S8, display the basic data and target star information on the star map;

[0083] Step S10: Magnify and reduce the star map according to its magnification.

[0084] Furthermore, the specific requirements for the selected celestial bodies in step S1 include the following:

[0085] Uniform spatial distribution: Select celestial bodies with a uniform spatial distribution to avoid situations where the selected celestial bodies are too concentrated or too scattered.

[0086] High representativeness: The selected stars should represent the basic situation of the entire star chart database, including brightness, color, and position;

[0087] Similar to the target star: When selecting the base data for some stars, stars similar to the target star should be selected to generate complete and accurate star map data.

[0088] Furthermore, in step S4, the specific method for generating the position, brightness, and color information of the target star based on the basic data of some stars recorded in step S1 is as follows:

[0089] Position information: The position information of the target celestial body is calculated based on the celestial coordinate system position, parallax, and proper motion information of some celestial bodies;

[0090] Brightness information: Calculate the brightness information of the target star based on information such as the luminosity and distance of some stars;

[0091] Color information: The color information of the target star is calculated based on the spectral and color index information of some stars.

[0092] Furthermore, the specific steps for calculating the target celestial body's position information based on its celestial coordinate system position, parallax, and proper motion information are as follows:

[0093] Step a: First, the equatorial coordinate system position of the celestial body needs to be converted to a rectangular coordinate system (xyz coordinates); that is, for a target celestial body, assume its right ascension is... Declination is Its coordinates x, y, z on the celestial sphere can be calculated using the following formula:

[0094]

[0095]

[0096] ;

[0097] Step b: When calculating the position of the target celestial body, parallax must be considered. Let π represent the parallax of the target celestial body. Then, the position of the target celestial body in the rectangular coordinate system can be calculated using the following formula:

[0098]

[0099]

[0100] ;

[0101] Step c: The angle between the observer's line of sight to the star on Earth and its trajectory, denoted by μ, can be used to calculate the position of the target celestial body using the following formula:

[0102] (Movement in the direction of right ascension)

[0103] (Movement in the direction of declination)

[0104] In the above formula, and These represent the right ascension and declination of the target celestial body after parallax correction;

[0105] Step d: By calculating the equatorial coordinates, parallax, and proper motion of the target celestial body through the above steps, its coordinate position (x, y, z) in the rectangular coordinate system can be calculated, thereby determining the position information of the target celestial body.

[0106] Furthermore, the specific steps for calculating the brightness information of the target star based on information such as the luminosity and distance of some celestial bodies are as follows:

[0107] First, let's assume the distance from the target celestial body to Earth is... (Using 10 parsecs as the basic unit), with an absolute magnitude of M, the apparent magnitude of a target celestial body in the field of view can be calculated using the following formula:

[0108]

[0109] Once the apparent magnitude of the target star is known, Wiener's theorem (also known as the law of conservation of energy) can be used to calculate the brightness of the target star. The brightness of the target star can be calculated using the following formula:

[0110]

[0111] in, It is the total radiant energy of the target celestial body. It is the distance from the target celestial body to Earth. It is the radiant flux per unit area of ​​the target celestial body, calculated based on the target celestial body's apparent magnitude and decolorization index:

[0112]

[0113] in, It is the radiant flux of the sun on the surface of the earth directly in front of it. It is a distance index, used to indicate that the farther away a target star is, the less bright it is. Calculated using the following basic formula:

[0114]

[0115] in, The wavelength dependence coefficient of the target star is closely related to its color. Its color index can be calculated by observing its brightness at different wavelengths.

[0116] Furthermore, calculating the color information of the target celestial body based on the spectral and color index information of some celestial bodies specifically includes the following steps:

[0117] Step 1: Assume the target celestial body is in and The luminous flux within the bands are respectively and Then its The index can be calculated as follows: ;

[0118] in, It is the wavelength dependence coefficient of the celestial body itself. The index indicates the position of celestial bodies in the sky. bands and Brightness difference between bands The smaller the index, the more bluish the target star is; The higher the index, the redder the target star's color;

[0119] Step 2: Based on the target celestial body Indices are used to determine the color and effective temperature of celestial bodies, assuming the target celestial body is... The index is Its color temperature can be calculated using the following formula:

[0120]

[0121] in, This is the effective temperature of the sun's surface, approximately 3.76K. It is the effective surface temperature of the target celestial body;

[0122] The third step is to use the equatorial latitude reduction method for extinction correction, assuming the target celestial body is in... , , and The color index within the band is , , Extinction correction can then be performed using the following formula:

[0123] in, and These are the reddening constants of interstellar extinction, typically taken as... =3.1 and =1.7. It is interstellar extinction pair The correction factor for the index is obtained through spectral analysis of the target star and equatorial latitude reduction calculation.

[0124] Furthermore, step S8, calculating the position and size of the target celestial body in the star chart, specifically includes:

[0125] Step S81: The right ascension of the target celestial body is known. and declination and the center point in the star chart Use the following formula to calculate the relative positions of celestial bodies in a star chart. :

[0126]

[0127] in, and These represent the horizontal and vertical positions of the target celestial body in the star chart, respectively, in pixels. This calculation formula uses trigonometric relationships in the celestial coordinate system to convert right ascension and declination into the relative positions of the target celestial body in the star chart.

[0128] Step S82: Given the position of the target celestial body on the celestial sphere and the pixel coordinates of the center point of the star map. The pixel coordinates of celestial bodies in a star map are calculated using the following formula. :

[0129]

[0130] in, and These represent the horizontal and vertical pixel coordinates of the celestial body in the star map, respectively. and This has already been calculated in the first step. This represents the rotation angle of the star chart, typically 0 degrees.

[0131] Step S83: Given the size and brightness of the target celestial body, as well as the parameters of the telescope and the response characteristics of the detector, calculate the size of the target celestial body in the image using the following formula:

[0132]

[0133] in, The size of the target celestial body in the image. The radius of the target celestial body. The pixel brightness of the target star. The focal length of the telescope is given, and the unit is pixels; the radius is given. Pixel brightness can be calculated based on the parallax or spectral characteristics of the target star. The focal length can be obtained by performing photometric analysis on the target celestial image. It can be determined based on the optical characteristics of the telescope and the resolution of the detector.

[0134] Furthermore, a star map simulation data system includes a basic data module, a target celestial body generation module, a star map parameter determination module, a celestial body coordinate calculation module, a star map display module, and a database management module. The basic data module stores and manages basic data for some celestial bodies, including their position, brightness, and color. The target celestial body generation module generates data for target celestial bodies, including their position, brightness, and color. The star map parameter determination module determines the center point, field of view, and magnification parameters of the star map based on user needs and telescope characteristics. The celestial body coordinate calculation module calculates the position and size of these target celestial bodies in the star map based on the star map parameters, basic data, and target celestial body information. The star map display module displays the position, brightness, and size information of the target celestial bodies on the interface. The database management module stores and manages the generated celestial body data.

[0135] This invention can simulate complete and accurate star map data, making up for some of the problems caused by missing real data, and has important application value in related research fields. The method of generating target celestial data in this invention can generate some key information that is difficult to obtain through simulation algorithms, thereby improving the completeness and accuracy of star maps. The star map parameters of this invention can be dynamically adjusted as needed, providing a more flexible and convenient way of use. The system provided by this invention is simple and easy to use, and provides convenient data query and management functions through database storage and management, making it convenient for users to conduct relevant analysis and research.

[0136] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for simulating star map data, characterized in that, Includes the following steps: Step S1: Select a subset of celestial bodies from a known complete star map database as the base data; Step S2: Record and store the basic data of the selected celestial bodies in Step S1, including key information such as position, brightness, and color, into the database; Step S3: Select a celestial body with similar basic data as the target celestial body; Step S4: Based on the basic data of some celestial bodies recorded in Step S1, generate the position, brightness, and color information of the target celestial body; Step S5: Using the information data from step S4, the fourth-order Runge-Kutta simulation algorithm is used to calculate and generate the orbital information of the target celestial body; Step S6: Store the information of the target celestial body generated in steps S4 and S5 into the database; Step S7: Determine the center point, field of view, and magnification parameters of the star chart based on observation requirements and telescope characteristics; Step S8: Based on the center point, field of view, magnification parameters of the star map in Step S7, the basic data in Step S1, and the information of the target star in Step S5, calculate the position and size of the target star in the star map. Step S9: Based on the star map parameters determined in step S8, display the basic data and target star information on the star map; Step S10: Magnify and reduce the star map according to its magnification. The specific method for generating the position, brightness, and color information of the target star in step S4 based on the basic data of some stars recorded in step S1 is as follows: Position information: The position information of the target celestial body is calculated based on the celestial coordinate system position, parallax, and proper motion information of some celestial bodies; Brightness information: Calculate the brightness information of the target star based on the luminosity and distance information of some stars; Color information: Calculate the color information of the target star based on the spectral and color index information of some stars; The process of calculating the color information of the target celestial body based on the spectral and color index information of some celestial bodies specifically includes the following steps: Step 1: Assume the target celestial body is in and The luminous flux within the bands are respectively and Then its The index is calculated as follows: ; in, It is the wavelength dependence coefficient of the celestial body itself. The index indicates the position of celestial bodies in the sky. bands and Brightness difference between bands The smaller the index, the more bluish the target star is; The higher the index, the redder the target star's color; Step 2: Based on the target celestial body Indices are used to determine the color and effective temperature of celestial bodies, assuming the target celestial body is... The index is Its color temperature is calculated using the following formula: ， in, The effective temperature of the sun's surface is 3.76K. It is the effective surface temperature of the target celestial body; The third step is to use the equatorial latitude reduction method for extinction correction, assuming the target celestial body is in... , , and The color index within the band is , , Then, use the following formula for extinction correction: , in, and These are the reddening constants of interstellar extinction, taken as... =3.1 and =1.7, It is interstellar extinction pair The correction factor for the index is obtained through spectral analysis of the target star and equatorial latitude reduction calculation.

2. The method for simulating star map data according to claim 1, characterized in that: The specific requirements for the selected celestial bodies in step S1 are as follows: Uniform spatial distribution: Select celestial bodies with a uniform spatial distribution to avoid situations where the selected celestial bodies are too concentrated or too scattered. High representativeness: The selected stars should represent the basic situation of the entire star chart database, including brightness, color, and position; Similar to the target star: When selecting the base data for some stars, stars similar to the target star should be selected to generate complete and accurate star map data.

3. The method for simulating star map data according to claim 1, characterized in that: The specific steps for calculating the position information of the target celestial body based on its celestial coordinate system position, parallax, and proper motion information are as follows: Step a: First, the equatorial coordinate system position of the celestial body needs to be converted to a rectangular coordinate system position; that is, for a target celestial body, assume its right ascension is... Declination is Its coordinates x, y, z on the celestial sphere are calculated using the following formula: ， ， ； Step b: When calculating the position of the target celestial body, parallax must be considered. Let π represent the parallax of the target celestial body. Then, the position of the target celestial body in the rectangular coordinate system is calculated using the following formula: ， ， ； Step c: The angle between the observer's line of sight to the star on Earth and its trajectory, denoted by μ, is used to calculate the position of the target celestial body using the following formula: ， ， In the above formula, and These represent the right ascension and declination of the target celestial body after parallax correction; Step d: By calculating the equatorial coordinates, parallax, and proper motion of the target celestial body through the above steps, its coordinate position (x, y, z) in the rectangular coordinate system can be calculated, thereby determining the position information of the target celestial body.

4. The method for simulating star map data according to claim 1, characterized in that: The specific steps for calculating the brightness information of the target star based on the luminosity and distance information of some stars are as follows: First, let's assume the distance from the target celestial body to Earth is... If the absolute magnitude is M, the apparent star level of the target object in the field of view is calculated using the following formula: ， After knowing the apparent value of the target star, Wiener's theorem is used to calculate the brightness of the target star. The brightness of the target star is calculated using the following formula: ， in, It is the total radiant energy of the target celestial body. It represents the distance from the target celestial body to Earth, and π represents the parallax of the target celestial body. It is the radiant flux per unit area of ​​the target celestial body, calculated based on the target celestial body's apparent magnitude and decolorization index: ， in, It is the radiant flux of the sun on the surface of the earth directly in front of it. It is a distance index, used to indicate that the farther away a target star is, the less bright it is. Calculate using the following formula: ， in, The wavelength dependence coefficient of the target star is closely related to its color. Its color index is calculated by observing its brightness at different wavelengths.

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