A method for realizing solar capture, precise tracking and precise image stabilization

Abstract

The present invention relates to the field of solar observation, and in particular to a method for realizing solar capture, precise tracking and precise image stabilization. The method is aimed at a polar orbit satellite platform that is stabilized on three axes of the earth, uses solar vector data at any position of the satellite platform on the orbit, and then calculates the deviation of the optical axis of the solar imager relative to the sun according to the position coordinates of the solar imager, adjusts the solar pointing tracking mechanism of the solar imager, and realizes solar capture, precise tracking and precise image stabilization of the solar imager.

Description

Technical Field

[0001] The present invention relates to the field of solar observation, and in particular to a method for realizing solar capture, precise tracking and precise image stabilization. Background Art

[0002] The sun is the closest star to the earth and the main source of energy for the earth. Its changes and evolution processes have a great impact on the earth, affecting the earth's space environment, the distribution of the earth's magnetic field, the earth's climate change, and even the earth's meteorological changes. Therefore, it is necessary to conduct long-term, high-spatial-resolution imaging monitoring of the sun to obtain high-resolution spectral distribution and high-resolution images of the sun. In particular, monitoring the X-ray and extreme ultraviolet bands that are sensitive to solar changes is of great significance for early and accurate forecasting and warning of space weather changes. In the past, solar imaging observation instruments were all installed on a sun-synchronous orbit space platform. The satellite platform ensured three-axis stability to the sun and achieved solar capture, tracking and stabilization. On the polar-orbiting satellite with three-axis stability to the earth, there is no solar imager for solar tracking and stabilization installed; there is no solution from solar vector calculation to sub-arcsecond pointing accuracy. Summary of the invention

[0003] The embodiment of the present invention provides a method for realizing sun capture, precise tracking and precise image stabilization, so as to at least solve the technical problem of low precision of existing sun tracking and image stabilization methods.

[0004] According to an embodiment of the present invention, a method for realizing sun capture, precise tracking and precise image stabilization is provided, comprising the following steps:

[0005] Installation of a solar imager on a polar-orbiting satellite platform;

[0006] Using the solar vector data of the polar-orbiting satellite platform at any position on the orbit, and based on the position coordinates of the solar imager, the deviation of the solar imager's optical axis relative to the sun is calculated.

[0007] The sun pointing tracking mechanism of the solar imager is adjusted by the deviation of the optical axis of the solar imager relative to the sun.

[0008] Furthermore, adjusting the sun pointing tracking mechanism of the solar imager by the deviation of the optical axis of the solar imager relative to the sun includes:

[0009] Initially point the optical axis of the solar imager toward the center of the sun;

[0010] Switch the solar pointing data to the high-precision solar pointing guide mirror built into the solar imager, continue searching using the solar pointing data, and point the optical axis of the solar imager toward the center of the sun;

[0011] Using the data of the sun-pointing guiding mirror, the solar imager is pointed at the center of the sun.

[0012] Furthermore, adjusting the sun-pointing tracking mechanism built in the solar imager based on the deviation of the optical axis of the solar imager relative to the sun specifically includes:

[0013] The optical axis of the solar imager is initially pointed at the center of the sun. Usually, the pointing deviation is relatively large, in the range of the order of 0.2°.

[0014] Switch the sun-pointing data to the high-precision sun-pointing guiding mirror built in the solar imager, and continue the search using the sun-pointing data. Point the optical axis of the solar imager at the center of the sun, usually within the range of several hundred arcseconds.

[0015] Using the data of the sun-pointing guiding mirror, the solar imager is pointed at the center of the sun, reaching a deviation range of several arcseconds. At this time, the pointing adjustment is completed, and the solar imager points at the center position of the sun, with the pointing accuracy at the arcsecond level.

[0016] Furthermore, adjusting the sun-pointing tracking mechanism built in the solar imager based on the deviation of the optical axis of the solar imager relative to the sun includes:

[0017] Using the real-time sun vector data provided by the satellite platform, calculate the pointing deviation of the optical axis of the satellite platform relative to the sun. At this time, the satellite platform roughly points at the sun.

[0018] According to the sun-pointing data of the guiding mirror and the sun-pointing adjustment function of the solar imager, search for the sun until the sun enters the field of view of the guiding mirror.

[0019] According to the precise position of the sun in the field of view of the guiding mirror, calculate the deviation relative to the center of the sun, and adjust the sun-pointing mechanism of the solar imager so that the solar imager accurately points at the sun.

[0020] Then, according to the precise position of the sun in the guiding mirror, adjust the precision pointing mechanism in the solar imager.

[0021] Furthermore, adjusting the sun-pointing tracking mechanism built in the solar imager based on the deviation of the optical axis of the solar imager relative to the sun specifically includes:

[0022] According to the sun-pointing data of the guiding mirror and the sun-pointing adjustment function of the solar imager, search for the sun until the sun enters the field of view of the guiding mirror. The field of view is about at the angular component level.

[0023] According to the precise position of the sun in the field of view of the guiding mirror, calculate the deviation relative to the center of the sun, and adjust the sun-pointing mechanism of the solar imager so that the solar imager accurately points at the sun, with the pointing accuracy in the range of several arcseconds.

[0024] Adjust the precision pointing mechanism in the solar imager according to the exact position of the sun in the guiding mirror.

[0025] Further, when adjusting the precision pointing mechanism in the solar imager, the sun-pointing accuracy of the solar imager is sub-arcsecond, and it is very sensitive to the pointing disturbance of the satellite platform. The solar imager adopts a built-in image stabilization mechanism to adjust the sun image stabilization in real time and maintain the long-term pointing stability within the sub-arcsecond accuracy range.

[0026] Further, when adjusting the sun-pointing mechanism of the solar imager, adjust the secondary mirror pointing or the primary mirror pointing to make the sun-pointing accuracy of the solar imager reach the sub-arcsecond accuracy.

[0027] Further, the method specifically includes:

[0028] Calculate the relative position according to the vector relationship between the polar orbiting satellite and the sun, search for the sun, and achieve an accuracy of 0.15°;

[0029] Use the two-dimensional pointing mechanism and the encoder to calculate the position and track the sun;

[0030] Use the solar guiding mirror data to close the loop with the two-dimensional pointing mechanism and track the sun to achieve an accuracy of 200″;

[0031] The high-precision sun pointing sensor gives the precise sun position and then precisely tracks the sun;

[0032] Furthermore, the sun precise pointing deviation signal provided by the high-precision and high-sampling-rate sun pointing sensor is used to correct the sun-pointing deviation in real time.

[0033] Further, the method specifically includes:

[0034] Install a precision sun imager for the sun on the three-axis stabilized platform for the earth to achieve sub-arcsecond-level sun-pointing accuracy;

[0035] Use the sun to initially calculate the position of the sun relative to the solar imager;

[0036] According to the initially calculated sun position, use the built-in sun-pointing mechanism of the solar imager to search for and capture the sun so that it enters the field of view of the guiding mirror;

[0037] Use the precise sun-pointing data of the guiding mirror to adjust the tracking platform to achieve arcsecond-level sun-pointing;

[0038] Use the precise sun-pointing data of the guiding mirror to adjust the precision pointing mechanism of the solar imager to achieve sub-arcsecond accuracy for sun-pointing;

[0039] Use the precise sun-pointing data of the guiding mirror to adjust the image stabilization mechanism in real time to maintain the pointing accuracy within the sub-arcsecond range within the exposure time of dozens of seconds.

[0040] Furthermore, the polar-orbiting satellite platform is a polar-orbiting satellite platform that is stabilized on three axes relative to the earth.

[0041] The method for realizing solar capture, precise tracking and precise image stabilization in the embodiment of the present invention is aimed at a polar-orbiting satellite platform that is stabilized on three axes of the earth. The solar vector data of the satellite platform at any position on the orbit is used, and then the deviation of the optical axis of the solar imager relative to the sun is calculated according to the position coordinates of the solar imager, and the solar pointing and tracking mechanism of the solar imager is adjusted to realize solar capture, precise tracking and precise image stabilization of the sun by the solar imager. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0043] Figure 1 A schematic diagram of the satellite platform pointing adjustment range and accuracy in the present invention;

[0044] Figure 2 A diagram showing the position of the instrument on the satellite platform of the present invention;

[0045] Figure 3 It is the field of view range diagram of the sun vector in the present invention;

[0046] Figure 4 This is a solar pointing accuracy diagram obtained by calculating the solar vector in the present invention. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] According to an embodiment of the present invention, a method for realizing sun capture, precise tracking and precise image stabilization is provided, comprising the following steps:

[0050] Installation of a solar imager on a polar-orbiting satellite platform;

[0051] Using the solar vector data of the polar-orbiting satellite platform at any position on the orbit, and based on the position coordinates of the solar imager, the deviation of the solar imager's optical axis relative to the sun is calculated.

[0052] The sun pointing tracking mechanism of the solar imager is adjusted by the deviation of the optical axis of the solar imager relative to the sun.

[0053] The method for realizing solar capture, precise tracking and precise image stabilization in the embodiment of the present invention is aimed at a polar-orbiting satellite platform that is stabilized on three axes of the earth. The solar vector data of the satellite platform at any position on the orbit is used, and then the deviation of the optical axis of the solar imager relative to the sun is calculated according to the position coordinates of the solar imager, and the solar pointing and tracking mechanism of the solar imager is adjusted to realize solar capture, precise tracking and precise image stabilization of the sun by the solar imager.

[0054] Among them, the sun pointing tracking mechanism of the solar imager is adjusted by adjusting the deviation of the optical axis of the solar imager relative to the sun, including:

[0055] Initially point the optical axis of the solar imager toward the center of the sun;

[0056] Switch the solar pointing data to the high-precision solar pointing guide mirror built into the solar imager, continue searching using the solar pointing data, and point the optical axis of the solar imager toward the center of the sun;

[0057] Using the data of the sun pointing guide mirror, the solar imager is pointed toward the center of the sun.

[0058] Among them, adjusting the sun pointing tracking mechanism of the solar imager by the deviation of the optical axis of the solar imager relative to the sun specifically includes:

[0059] The optical axis of the solar imager is initially pointed towards the center of the sun. Usually, the pointing deviation is relatively large, in the range of about 0.2°.

[0060] Switch the solar pointing data to the high-precision solar pointing guiding mirror carried by the solar imager, and continue the search using the solar pointing data. Point the optical axis of the solar imager towards the center of the sun, usually within a few hundred arcseconds.

[0061] Using the data of the solar pointing guiding mirror, point the solar imager towards the center of the sun, achieving a deviation range of a few arcseconds. At this time, the pointing adjustment is completed, and the solar imager points to the center position of the sun with a pointing accuracy at the arcsecond level.

[0062] Among them, adjusting the sun-pointing tracking mechanism carried by the solar imager through the deviation of the optical axis of the solar imager relative to the sun includes:

[0063] Using the real-time solar vector data provided by the satellite platform, calculate the pointing deviation of the optical axis of the satellite platform towards the sun. At this time, the satellite platform roughly points to the sun.

[0064] According to the sun-pointing data of the guiding mirror and the sun-pointing adjustment function of the solar imager, search for the sun until the sun enters the field of view of the guiding mirror.

[0065] According to the precise position of the sun in the field of view of the guiding mirror, calculate the deviation relative to the center of the sun, and adjust the sun-pointing mechanism of the solar imager so that the solar imager accurately points to the sun.

[0066] Then, according to the precise position of the sun in the guiding mirror, adjust the precise pointing mechanism in the solar imager.

[0067] Among them, adjusting the sun-pointing tracking mechanism carried by the solar imager through the deviation of the optical axis of the solar imager relative to the sun specifically includes:

[0068] According to the sun-pointing data of the guiding mirror and the sun-pointing adjustment function of the solar imager, search for the sun until the sun enters the field of view of the guiding mirror. The field of view range is about at the angular component level.

[0069] According to the precise position of the sun in the field of view of the guiding mirror, calculate the deviation relative to the center of the sun, and adjust the sun-pointing mechanism of the solar imager so that the solar imager accurately points to the sun with a pointing accuracy within a few arcseconds.

[0070] Then, according to the precise position of the sun in the guiding mirror, adjust the precise pointing mechanism in the solar imager.

[0071] Among them, when adjusting the precision pointing mechanism in the solar imager, the solar imager's pointing accuracy to the sun is sub-arc second, and it is very sensitive to the pointing disturbance of the satellite platform. The solar imager uses its own stabilization mechanism to adjust the solar image in real time to maintain long-term pointing stability within the sub-arc second accuracy range.

[0072] When adjusting the solar imager's sun pointing mechanism, the secondary mirror pointing or the primary mirror pointing is adjusted so that the solar imager's sun pointing accuracy reaches sub-arc second accuracy.

[0073] The method specifically includes:

[0074] Based on the vector relationship between the polar-orbiting satellite and the sun, the relative position is calculated and the sun is found with an accuracy of 0.15°;

[0075] Use a two-dimensional pointing mechanism and encoder to calculate position and track the sun;

[0076] Using the data from the solar guidance mirror, the two-dimensional pointing mechanism is closed-loop to track the sun with an accuracy of 200″;

[0077] The high-precision sun pointing sensor gives the precise sun position and then precisely tracks the sun;

[0078] The high-precision, high-sampling rate sun pointing sensor provides a precise sun pointing deviation signal to correct the sun pointing deviation in real time.

[0079] The method specifically includes:

[0080] Install a precision solar imager on a three-axis stabilized platform to achieve sub-arcsecond solar pointing accuracy;

[0081] Use the sun to make preliminary calculations to get the sun's position relative to the solar imager;

[0082] According to the initially calculated sun position, the sun pointing mechanism of the solar imager is used to search and capture the sun so that it enters the field of view of the guide mirror.

[0083] Using the precise solar pointing data of the guidance mirror, the tracking platform is adjusted to achieve solar pointing at the arc second level;

[0084] Using the precise solar pointing data of the guidance mirror, the precise pointing mechanism of the solar imager is adjusted to achieve sub-arc second precision in solar pointing.

[0085] Using the precise solar pointing data of the guidance mirror, the image stabilization mechanism is adjusted in real time to maintain an exposure time within tens of seconds and a pointing accuracy within the sub-arc second range.

[0086] Among them, the polar-orbiting satellite platform is a polar-orbiting satellite platform that is stabilized on three axes of the earth.

[0087] The following is a specific embodiment, and see Figures 1-4 , the method of realizing sun capture, precise tracking and precise image stabilization of the present invention is described in detail:

[0088] The present invention calculates the solar vector and preliminarily obtains the solar pointing accuracy of about 0.15°, and then uses the solar precision pointing guide mirror to reach the pointing accuracy of sub-arcsecond. The present invention proposes for the first time to install a solar imager on a polar orbit satellite platform to realize solar search, tracking and image stabilization, perform long exposure time and high-resolution imaging, and obtain high-quality solar observation images. This type of satellite platform is designed for earth observation instruments, is three-axis stable on the ground, and can perform global observation of the earth. There is a change in the angle range of ±23° for the sun, and its change rate changes with different seasons. Among them, the change rate in the spring equinox and autumnal equinox is the largest, and the other times gradually slow down. Due to the different orbital altitudes used and the different changes with the seasons, the angle change range of each orbit is different. Therefore, it is necessary to search and track the sun; due to the jitter of the satellite itself and the movement of other payloads on the satellite, the solar imager needs to be stabilized. In view of the movement characteristics of polar orbit satellites, the present invention invents a method and device for solar capture, precision tracking and precision image stabilization on a polar orbit satellite platform, searches and tracks the sun, and implements image stabilization when the solar imager is exposed, so as to achieve the purpose of high-quality observation of the sun.

[0089] A common satellite platform carries multiple payloads, and different payloads contain different motion mechanisms, such as the motion of a pointing adjustment flywheel, the motion of a solar sailboard, the pointing adjustment motion of a payload instrument, and other motion mechanisms. These motions are irregular and non-uniform, and their motions will have a certain impact on the imaging of a solar imager with an angular resolution of several arc seconds. To this end, the present invention uses a secondary image stabilization mechanism to adjust the tiny pointing deviation within a range of 200" in real time on the basis of precise pointing adjustment, ensuring that the pointing direction of the solar imager remains unchanged during the solar imaging process, and can achieve a sub-arc second pointing deviation level. This ensures the observation effect of the solar observation instrument.

[0090] The present invention solves the technical problem of high-precision observation of solar observation instruments on non-solar three-axis space platforms, improves the use efficiency of space platforms, and can simultaneously perform high-precision observations of non-solar targets such as the Earth and the Sun on a single space platform. It proposes a method for searching and tracking the Sun, a method for achieving solar image stabilization, and solves the technical problems of pointing deviation and image shaking in solar imaging by solar imagers, which has important application value.

[0091] The present invention relates to a method for realizing solar capture, precise tracking and precise image stabilization on a dawn-dusk orbit satellite platform. The present invention is directed to a polar orbit satellite platform that is three-axis stable on the earth. The present invention uses solar vector data at any position of the satellite platform on the orbit, and then calculates the deviation of the optical axis of the solar imager relative to the sun according to the position coordinates of the solar imager, adjusts the solar pointing tracking mechanism of the solar imager, and initially points the optical axis of the solar imager to the center of the sun. Usually, the pointing deviation is large, within the range of 0.2°; at this time, the solar pointing data is switched to the high-precision solar pointing guide mirror of the solar imager, and the solar pointing data is used to continue searching, and the optical axis of the solar imager is pointed to the center of the sun, usually within the range of several hundred arc seconds; using the solar pointing guide mirror data, the solar imager is pointed to the center of the sun, reaching a deviation range of several arc seconds. At this time, the pointing adjustment is completed, the solar imager points to the center of the sun, and the pointing accuracy is at the level of arc seconds, so that the solar imager can capture the sun, precisely track and precisely stabilize the sun.

[0092] Install the solar imager with a precise solar pointing guide mirror, and adjust the optical axis of the guide mirror to the optical axis of the observation instrument. The optical axis of the guide mirror is the optical axis of the imager. Then adjust the optical axis of the guide mirror to the optical axis of the satellite platform with three-axis stability to the ground. Then the satellite optical axis, the solar imager optical axis and the guide mirror optical axis are unified. When in orbit, as long as the instrument turntable is adjusted or the satellite pointing is adjusted according to the deviation of the guide mirror pointing to the sun, the instrument optical axis and the satellite optical axis can be precisely pointed to the sun. The specific description is as follows:

[0093] Using the real-time solar vector data provided by the satellite platform, the pointing deviation of the satellite platform's optical axis to the sun is calculated. At this time, the satellite platform roughly points to the sun, and the pointing deviation is several angular components.

[0094] According to the sun pointing data of the guide mirror and the sun pointing adjustment function of the solar imager, search for the sun until the sun enters the field of view of the guide mirror, and the field of view is about the angular component level;

[0095] According to the precise position of the sun in the field of view of the guide mirror, the deviation relative to the center of the sun is calculated, and the solar imager pointing mechanism is adjusted to make the solar imager accurately point to the sun with a pointing accuracy within a few arc seconds;

[0096] Then, according to the precise position of the sun in the guidance mirror, the precise pointing mechanism in the solar imager is adjusted, such as adjusting the pointing of the secondary mirror or the primary mirror, so that the solar imager can point to the sun with sub-arc second accuracy.

[0097] At this time, the solar imager's pointing accuracy towards the sun is sub-arc second, and it is very sensitive to the pointing disturbance of the satellite platform. The solar imager uses its own image stabilization mechanism to adjust the solar image in real time to maintain long-term pointing stability within the sub-arc second accuracy range.

[0098] Ultimately, on a polar-orbiting satellite platform with three-axis stability relative to the Earth, the goal of capturing the sun, tracking the sun, and pointing at the sun with high precision and stability will be achieved.

[0099] Figure 1 This is a schematic diagram of the satellite platform pointing adjustment range and accuracy (the satellite revolves around the earth, one direction points to the earth, and the other direction points to the sun, ±23°).

[0100] Figure 2 It is the position of the instrument on the satellite platform (the instrument is fixed on the satellite, and there is a fixed installation angle between the instrument and the satellite).

[0101] When the satellite is orbiting the earth, the satellite is stable in three axes relative to the earth and rotates relative to the sun. For example, Fengyun-3E satellite rotates once in 102 minutes in a circular orbit with a constant speed of 212" / s. Since the satellite is rotating relative to the sun, the edge range of the detector cannot move more than 1 pixel size during the exposure time of the solar imager to ensure that the required image resolution is obtained.

[0102] Figure 3 The field of view of the solar vector is within the angle range of ±0.15° as shown in the figure. The solar pointing instrument is installed on a two-dimensional pointing turntable. By adjusting the pointing movement, a spiral movement centered on point O is achieved, and finally the sun enters the field of view of the guide mirror, that is, the sun is captured.

[0103] Figure 4 The solar pointing accuracy calculated for the solar vector is ±0.15°. By using the two-dimensional pointing mechanism of the solar pointing instrument and moving in the azimuth and elevation directions of the solar pointing, the sun is finally brought into the field of view of the guide mirror (e.g., 200″ range), that is, the sun is captured.

[0104] The key points and protection points of the present invention are at least:

[0105] Install a precision solar imager on a three-axis stabilized platform to achieve sub-arcsecond solar pointing accuracy;

[0106] Use the sun to make preliminary calculations to get the sun's position relative to the solar imager;

[0107] According to the initially calculated sun position, the sun pointing mechanism of the solar imager is used to search and capture the sun so that it enters the field of view of the guide mirror.

[0108] Using the precise solar pointing data of the guidance mirror, the tracking platform is adjusted to achieve solar pointing at the arc second level;

[0109] Using the precise sun-pointing data of the guiding mirror, adjust the precise pointing mechanism of the solar imager to achieve sub-arcsecond accuracy in sun-pointing;

[0110] Using the precise sun-pointing data of the guiding mirror, adjust the image stabilization mechanism in real time to maintain a pointing accuracy within the sub-arcsecond range within an exposure time of dozens of seconds.

[0111] The serial numbers of the embodiments of the present invention above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0112] In the above embodiments of the present invention, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0113] In the several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the system embodiments described above are only illustrative. For example, the division of units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of units or modules can be in electrical or other forms.

[0114] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0115] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0116] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present invention. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs.

[0117] The foregoing are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for realizing solar capture, precise tracking and precise image stabilization, characterized in that It includes the following steps: Install a solar imager on a polar orbiting satellite platform; Utilize the solar vector data of the polar orbiting satellite platform at any position in the orbit, and then calculate the deviation of the optical axis of the solar imager relative to the sun based on the position coordinates of the solar imager; Adjust the sun-pointing tracking mechanism of the solar imager itself through the deviation of the optical axis of the solar imager relative to the sun; where: The adjustment of the sun-pointing tracking mechanism of the solar imager itself through the deviation of the optical axis of the solar imager relative to the sun specifically includes: Preliminarily point the optical axis of the solar imager at the center of the sun. Usually, the pointing deviation is relatively large, in the range of the order of 0.2°; Switch the sun-pointing data to the high-precision sun-pointing guiding mirror of the solar imager itself, and continue the search using the sun-pointing data to point the optical axis of the solar imager at the center of the sun. Usually, it is within the range of several hundred arcseconds; Utilize the data of the sun-pointing guiding mirror to point the solar imager at the center of the sun, reaching a deviation range of several arcseconds. At this time, the pointing adjustment is completed, and the solar imager points at the center position of the sun, with a pointing accuracy at the arcsecond level.

2. A method for realizing solar capture, precise tracking and precise image stabilization, characterized in that, It includes the following steps: Install a solar imager on a polar orbiting satellite platform; Utilize the solar vector data of the polar orbiting satellite platform at any position in the orbit, and then calculate the deviation of the optical axis of the solar imager relative to the sun based on the position coordinates of the solar imager; Adjust the sun-pointing tracking mechanism of the solar imager itself through the deviation of the optical axis of the solar imager relative to the sun; where: The adjustment of the sun-pointing tracking mechanism of the solar imager itself through the deviation of the optical axis of the solar imager relative to the sun specifically includes: Search for the sun according to the sun-pointing data of the guiding mirror and the sun-pointing adjustment function of the solar imager until the sun enters the field of view range of the guiding mirror. The field of view range is about at the angular component level; Calculate the deviation relative to the center of the sun according to the exact position of the sun in the field of view of the guiding mirror, and adjust the sun-pointing mechanism of the solar imager so that the solar imager accurately points at the sun, with a pointing accuracy within the range of several arcseconds; Then adjust the precision pointing mechanism in the solar imager according to the exact position of the sun in the guiding mirror.

3. The method for realizing sun capture, precise tracking and precise image stabilization according to claim 2, wherein When adjusting the precision pointing mechanism in the solar imager, the sun-pointing accuracy of the solar imager is sub-arcsecond and is very sensitive to the pointing disturbance of the satellite platform. The solar imager adopts its own image stabilization mechanism to adjust the sun image stabilization in real time and maintain long-term pointing stability within the sub-arcsecond accuracy range.

4. The method for realizing solar capture, precise tracking, and precise image stabilization according to claim 2, characterized in that, When adjusting the sun-pointing mechanism of the solar imager, adjust the pointing of the secondary mirror or the primary mirror so that the sun-pointing accuracy of the solar imager reaches the sub-arcsecond accuracy.

5. The method for realizing solar capture, precise tracking and precise image stabilization according to claim 1 or 2, characterized in that, The polar orbiting satellite platform is a polar orbiting satellite platform that is three-axis stabilized with respect to the earth.

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