A method for quantitatively evaluating geometric accuracy of laser height points of a remote sensing satellite

Abstract

The application discloses a kind of remote sensing satellite laser height point geometric precision quantitative evaluation methods, comprising: quantitative evaluation satellite laser height point geometric positioning error caused by attitude measurement data error in satellite laser altimetry process;Quantitative evaluation satellite laser height point geometric positioning error caused by orbit measurement data error;Quantitative evaluation satellite laser height point geometric positioning error caused by laser altimetry time, attitude measurement time, orbit measurement time and other time errors;Quantitative evaluation satellite laser height point geometric positioning error caused by laser pointing angle error;Comprehensive evaluation the overall influence of satellite laser height point geometric positioning precision by various errors in satellite laser altimetry process.The method of the application is simple to operate, and the cost is very low, which can be used for quantitative evaluation of satellite laser height point geometric precision in any area and any time period, and has great practicality advantage.

Description

Technical Field

[0001] This invention relates to the field of remote sensing image computing, and in particular to a method for quantitatively evaluating the geometric accuracy of remote sensing satellite laser elevation points. Background Technology

[0002] Satellite laser altimetry technology can acquire high-precision elevation information of discrete points on the Earth's surface. The generated laser elevation point products can be widely used in stereo mapping control, large lake water level measurement, polar change monitoring, high-precision topographic surveying, and vegetation height and biomass estimation. The geometric accuracy of laser elevation points includes both planar accuracy and elevation accuracy, which are the most critical indicators determining the quality and application capabilities of satellite laser elevation points. Conducting theoretical analysis and quantitative evaluation of the geometric positioning accuracy of satellite laser elevation points is not only a fundamental guarantee for their application but also provides a reference for setting technical indicators during the development of laser altimetry satellites. Currently, domestic and international evaluations of the geometric positioning accuracy of satellite laser elevation points mainly focus on selecting typical test areas and conducting geometric accuracy verification experiments using high-precision ground control data. This method requires field measurements or the collection of dense high-precision control points, which is costly and complex, preventing large-scale implementation. Furthermore, the limited number of test areas leads to certain limitations and deceptiveness in the evaluation results of the geometric accuracy of laser elevation points.

[0003] Numerous studies have shown that the main sources of error affecting the geometric accuracy of satellite laser elevation points include time error, attitude measurement error, orbit measurement error, laser pointing angle error, as well as atmospheric delay, Earth tides, and ranging errors caused by satellite hardware. In addition, errors in the observed target (mainly including the effects of terrain undulation and surface roughness) also affect the geometric accuracy of laser elevation points. However, during the production process of satellite laser elevation point products, atmospheric delay correction models and tidal correction models are generally used to correct for errors in laser ranging values, and laser elevation points with terrain undulation and surface roughness within the footprint range are eliminated. Therefore, the impact of atmospheric delay, Earth tides, terrain undulation, and surface roughness on the accuracy of laser elevation points can be ignored. Furthermore, for satellite laser altimeters, on-orbit laser geometric calibration is generally carried out at a reasonable frequency, effectively eliminating ranging errors caused by satellite hardware, which can also be ignored. Therefore, the geometric accuracy of satellite laser elevation point products distributed externally is mainly affected by the combined influence of satellite attitude measurement error, orbit measurement error, various time errors, and laser pointing angle error.

[0004] In summary, there is an urgent need to systematically analyze the impact of various major errors on the plane and elevation errors of laser elevation points during satellite laser altimetry and laser elevation point processing, based on the mechanism of satellite laser altimetry, to quantitatively deduce the degree of influence of various error sources on the geometric positioning accuracy of satellite laser elevation points, and to design a quantitative evaluation method for the geometric positioning accuracy of satellite laser elevation points. Summary of the Invention

[0005] The purpose of this invention is to provide a method for quantitatively evaluating the geometric accuracy of remote sensing satellite laser elevation points, thereby solving the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A method for quantitatively assessing the geometric accuracy of remote sensing satellite laser elevation points includes:

[0008] S1, Quantitatively assess the plane positioning error of satellite laser elevation points caused by attitude measurement data errors during satellite laser altimetry. and elevation positioning error ;

[0009] S2, Quantitatively assess the plane positioning error of satellite laser elevation points caused by orbit measurement data errors during satellite laser altimetry. and elevation positioning error ;

[0010] S3, Quantitatively assess the plane positioning error of satellite laser elevation points caused by time errors such as laser elevation measurement time, attitude measurement time, and orbit measurement time during satellite laser altimetry. and elevation positioning error ;

[0011] S4, Quantitatively assess the plane positioning error of satellite laser elevation points caused by laser pointing angle error during satellite laser altimetry. and elevation positioning error ;

[0012] S5 comprehensively evaluates the overall impact of various errors during satellite laser altimetry on the horizontal and vertical accuracy of satellite laser elevation points, and obtains the final horizontal positioning error of the satellite laser elevation points. and elevation positioning error The quantitative assessment results are given by the following formula:

[0013]

[0014]

[0015] That is, the quantitative evaluation results of the plane accuracy and elevation accuracy of satellite laser elevation points.

[0016] Preferably, step S1 specifically includes:

[0017] S11, based on the principle that attitude and pitch angle errors affect the geometric positioning error of satellite laser elevation points during satellite laser altimetry, define and evaluate the plane error of satellite laser elevation points caused by attitude and pitch angle errors. and elevation error The method, the formula is:

[0018]

[0019]

[0020] in, This refers to the satellite's attitude pitch angle error; This is the laser ranging value. This represents the angular component of the laser pointing angle of the laser altimeter in the elevation direction;

[0021] S12, based on the principle that attitude roll angle error affects the geometric positioning error of satellite laser elevation points during satellite laser altimetry, define and evaluate the plane error of satellite laser elevation points caused by attitude roll angle error. and elevation error The method, the formula is,

[0022]

[0023]

[0024] in, This refers to the satellite attitude roll angle error. This is the laser ranging value. This represents the angular component of the laser pointing angle of the laser altimeter in the roll angle direction;

[0025] S13, based on the principle that attitude yaw angle error affects the geometric positioning error of satellite laser elevation points during satellite laser altimetry, define and evaluate the plane error of satellite laser elevation points caused by attitude yaw angle error. and elevation error The method, the formula is,

[0026]

[0027]

[0028] in, This refers to the satellite's attitude yaw angle error. This is the laser ranging value. This refers to the laser pointing angle;

[0029] S14 defines the plane error of the satellite laser elevation point caused by the error in the attitude measurement data. and elevation error The method, the formula is,

[0030]

[0031]

[0032] Preferably, in step S2, the radial error of the orbit during satellite laser altimetry is used as the basis for the calculation. Error along the track and vertical track error The principle of the influence of geometric positioning error of laser elevation points is defined, and the plane error of laser elevation points caused by track measurement error is evaluated. and elevation error The method, the formula is:

[0033]

[0034]

[0035] Preferably, step S3 specifically includes:

[0036] S31, based on the principle that the time error of laser altimetry affects the geometric positioning error of satellite laser elevation points, define an evaluation method for laser altimetry time error. Caused by satellite laser elevation point plane error and elevation error The method, the formula is:

[0037]

[0038]

[0039] in, For the satellite's flight speed;

[0040] S32, based on the principle that the orbit measurement time error in satellite laser altimetry affects the geometric positioning error of satellite laser elevation points, defines an evaluation method for the orbit measurement time error. Caused by satellite laser elevation point plane error and elevation error The method, the formula is:

[0041]

[0042]

[0043] S33, based on the principle that attitude measurement time error affects the geometric positioning error of satellite laser elevation points during satellite laser altimetry, defines an evaluation method for attitude measurement time error. Caused by satellite laser elevation point plane error and elevation error The method, the formula is:

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050]

[0051]

[0052] in, These are the plane errors of the laser elevation point caused by satellite attitude pitch angle, roll angle, and yaw angle errors due to attitude measurement time errors. These are the laser elevation errors caused by satellite attitude pitch angle, roll angle, and yaw angle errors due to attitude measurement time errors. These represent the stability of the satellite's attitude in the pitch, roll, and yaw directions, respectively.

[0053] S34 defines and evaluates the horizontal errors of satellite laser elevation points caused by various time-related errors. and elevation error The method, the formula is,

[0054]

[0055]

[0056] Preferably, step S4 specifically includes:

[0057] S41, based on the principle that the error in the direction of the laser pointing angle and elevation angle during satellite laser altimetry affects the geometric positioning error of the satellite laser elevation point, a method is defined to evaluate the planar error of the satellite laser elevation point caused by the error in the direction of the laser pointing angle in the elevation angle. and elevation error The method, the formula is:

[0058]

[0059]

[0060] in, This represents the error in the laser pointing angle along the pitch direction; This is the laser ranging value. This represents the angular component of the laser pointing angle in the elevation direction;

[0061] S42, based on the principle that the error of the laser pointing angle in the roll angle direction affects the geometric positioning error of the satellite laser elevation point during satellite laser altimetry, a definition is defined to evaluate the planar error of the satellite laser elevation point caused by the error of the laser pointing angle in the roll angle direction. and elevation error The method, the formula is,

[0062]

[0063]

[0064] in, This refers to the error in the laser pointing angle in the roll angle direction; This is the laser ranging value. This represents the angular component of the laser pointing angle in the roll angle direction;

[0065] S43, based on the principle that the error of the laser pointing angle in the yaw angle direction affects the geometric positioning error of the satellite laser elevation point during satellite laser altimetry, a definition is defined to evaluate the planar error of the satellite laser elevation point caused by the error of the laser pointing angle in the yaw angle direction. and elevation error The method, the formula is,

[0066]

[0067]

[0068] in, This represents the error in the laser pointing angle along the yaw angle direction. This is the laser ranging value. This refers to the laser pointing angle;

[0069] S44 defines the assessment of the plane error of the satellite laser elevation point caused by the laser pointing angle error. and elevation error The method, the formula is,

[0070]

[0071] .

[0072] The beneficial effects of this invention are:

[0073] This invention provides a method for evaluating the geometric positioning accuracy of remote sensing satellite laser elevation points. Starting from the influence mechanism of various errors in the satellite laser altimetry process on the geometric accuracy of laser elevation points, this method quantitatively derives the ways and degrees in which the main error sources affect the horizontal and vertical positioning accuracy of satellite laser elevation points. It is a novel and effective method for evaluating the geometric positioning accuracy of satellite laser elevation points. It comprehensively considers the combined effects and magnitudes of attitude measurement errors, orbit measurement errors, time errors, and laser pointing angle errors in the satellite laser altimetry process on the horizontal and vertical positioning accuracy of laser elevation points, making the final evaluation results scientific, accurate, and reliable.

[0074] Compared to traditional accuracy assessment methods that utilize typical test areas to conduct geometric accuracy verification experiments on satellite laser elevation points, the method of this invention is simple to operate, extremely low in cost, and applicable to the quantitative assessment of the geometric accuracy of satellite laser elevation points in any region and at any time, possessing significant practical advantages. In addition to its use in assessing the geometric accuracy of satellite laser elevation points, the mechanism and quantitative formulas explaining the impact of errors on the planar and elevation positioning accuracy of laser elevation points can also provide a reference for the design of technical indicators during the development of laser altimetry satellites. Attached Figure Description

[0075] Figure 1 This is a flowchart illustrating the principle of a method for quantitatively evaluating the geometric accuracy of remote sensing satellite laser elevation points, as provided in this embodiment. Detailed Implementation

[0076] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0077] Example

[0078] This embodiment provides a method for quantitatively assessing the geometric accuracy of remote sensing satellite laser elevation points, and its principle flowchart is as follows: Figure 1 As shown, it includes the following steps:

[0079] Step S1: Quantitatively assess the plane positioning error of the satellite laser elevation point caused by attitude measurement data errors during satellite laser altimetry. and elevation positioning error This step specifically includes the following:

[0080] Step S11: The satellite attitude angle consists of pitch angle, roll angle, and yaw angle. The pitch angle is the angle of rotation around the satellite's horizontal axis in the satellite's body coordinate system. Based on the principle that the attitude pitch angle error affects the geometric positioning error of the satellite laser elevation point during satellite laser altimetry, the plane positioning error of the satellite laser elevation point caused by the attitude pitch angle error is defined and evaluated. and elevation positioning error The method, the formula is

[0081]

[0082]

[0083] in, This refers to the satellite's attitude pitch angle error; This is the laser ranging value. This represents the angular component of the laser pointing angle of the laser altimeter in the elevation direction;

[0084] Step S12: Based on the principle that the attitude roll angle error affects the geometric positioning error of the satellite laser elevation point during satellite laser altimetry, define and evaluate the planar positioning error of the satellite laser elevation point caused by the attitude roll angle error. and elevation positioning error The method, the formula is,

[0085]

[0086]

[0087] in, This refers to the satellite attitude roll angle error. This is the laser ranging value. This represents the angular component of the laser pointing angle of the laser altimeter in the roll angle direction;

[0088] Step S13: Based on the principle that attitude yaw angle error affects the geometric positioning error of satellite laser elevation points during satellite laser altimetry, define and evaluate the planar positioning error of satellite laser elevation points caused by attitude yaw angle error. and elevation positioning error The method, the formula is,

[0089]

[0090]

[0091] in, This refers to the satellite's attitude yaw angle error. This is the laser ranging value. Laser pointing angle

[0092] Step S14: Since the pitch, roll, and yaw angle errors propagate independently, define and evaluate the satellite laser elevation point plane error caused by the attitude error. and elevation error The method, the formula is,

[0093]

[0094]

[0095] Defined as the angular component of the laser pointing angle in the pitch direction.

[0096] (Defined as the angular component of the laser pointing angle in the roll angle direction)

[0097] Step S2: Quantitatively assess the plane positioning error of the satellite laser elevation point caused by orbit measurement data errors during satellite laser altimetry. and elevation positioning error ;

[0098] Satellite orbit measurement errors can be decomposed into orbital errors along the orbital direction. Vertical error of the track and orbital radial error Satellite orbital error along the orbital direction and vertical track error This will cause equivalent translational errors of the laser elevation point on the ground along the orbital direction and perpendicular to the orbital direction, respectively. Therefore, the planar error of the laser elevation point caused by the satellite orbital error is... for:

[0099]

[0100] Track radial error This will cause an equivalent elevation error at the laser elevation point. The formula is:

[0101]

[0102] Step S3: Quantitatively assess the plane positioning error of the satellite laser elevation point caused by time errors such as laser elevation measurement time, attitude measurement time, and orbit measurement time during the satellite laser altimetry process. and elevation positioning error ;

[0103] Step S31: When the satellite laser altimeter emits a laser pulse towards the ground, it records the emission time, known as the laser altimeter time. Its error is called the laser altimeter time error. The laser altimeter time error is also relative to the actual ground time. This will cause a plane positioning error for the laser elevation point along the orbital direction, but will not cause an elevation positioning error for the laser elevation point itself. Therefore, the plane positioning error of the satellite laser elevation point caused by the laser altimeter measurement time error is... and elevation positioning error respectively:

[0104]

[0105]

[0106] in, For the satellite's flight speed;

[0107] In step S32, when the satellite orbit measurement system measures discrete satellite orbit measurement data at a certain frequency, it also records the time corresponding to each set of orbit measurement data (referred to as orbit measurement time). When the laser altimeter time and the orbit measurement time are not synchronized, the actual orbit measurement data corresponding to the laser altimeter time cannot be obtained when the orbit measurement data is obtained using the laser altimeter time. This is equivalent to introducing additional orbit measurement data errors, which in turn affects the geometric positioning accuracy of the laser elevation point.

[0108] Because the magnitude of the orbital time error is very small, the satellite's orbital motion is typically a uniform linear motion with a fixed attitude over a very short period of time. In this case, the orbital measurement time error... The introduced additional orbital data error will cause an equivalent translational error of the laser elevation point on the ground along the orbital direction. The formula is:

[0109]

[0110] Without considering surface conditions, the orbital translation error will not cause errors in the elevation positioning of the laser elevation point; therefore, the orbital measurement time error... Elevation error caused by satellite laser elevation points for:

[0111]

[0112] In step S33, when the satellite attitude measurement system measures discrete satellite attitude data at a certain frequency, it also records the time corresponding to each set of attitude measurement data (referred to as attitude measurement time). When the laser altimeter time and the attitude measurement time are not synchronized, the actual attitude measurement data corresponding to the laser altimeter time cannot be obtained when the attitude measurement data is obtained using the laser altimeter time. This is equivalent to introducing additional attitude measurement data errors, which in turn affects the geometric positioning accuracy of the laser altimeter.

[0113] When a satellite's attitude is undergoing a continuous change over a short period (note: this mainly refers to attitude changes caused by instability, not attitude changes caused by deliberate adjustments for photographic purposes), attitude measurement time errors will introduce additional attitude measurement errors. Since the magnitude of attitude measurement time errors is very small, the satellite's attitude typically rotates uniformly in the pitch, roll, and yaw directions over a short period; the rotational speed is the satellite's attitude stability value. In this case, the attitude time error... This results in pitch angle error, roll angle error, and yaw angle error.

[0114] Referring to the formula for the influence of attitude measurement data error on the geometric positioning accuracy of laser elevation points in steps S11-S14 above, the attitude measurement time error can be obtained. The resulting satellite laser elevation point horizontal positioning error and elevation positioning error The method, the formula is:

[0115]

[0116]

[0117]

[0118]

[0119]

[0120]

[0121]

[0122]

[0123] in, These are the plane errors of the laser elevation point caused by satellite attitude pitch angle, roll angle, and yaw angle errors due to attitude measurement time errors. These are the laser elevation errors caused by satellite attitude pitch angle, roll angle, and yaw angle errors due to attitude measurement time errors. These represent the attitude stability in the pitch, roll, and yaw directions, respectively.

[0124] Step S34: Since the aforementioned time errors propagate independently, the satellite laser elevation point plane error caused by each type of time error is evaluated. and elevation error The formula is,

[0125]

[0126]

[0127] Step S4: Quantitatively assess the plane positioning error of the satellite laser elevation point caused by the laser pointing angle error during satellite laser altimetry. and elevation positioning error ;

[0128] Step S41: The laser pointing angle error is an angular error, which can be decomposed into laser pointing angle elevation angle error, laser pointing angle roll angle error, and laser pointing angle yaw angle error. Based on the principle that the laser pointing angle elevation angle direction error affects the geometric positioning error of the satellite laser elevation point during satellite laser altimetry, the plane positioning error of the satellite laser elevation point caused by the laser pointing angle elevation angle direction error is defined and evaluated. and elevation positioning error The method, the formula is:

[0129]

[0130]

[0131] in, This represents the error in the laser pointing angle along the pitch direction; This is the laser ranging value. This represents the angular component of the laser pointing angle in the elevation direction;

[0132] Step S42: Based on the principle that the error of the laser pointing angle in the roll angle direction affects the geometric positioning error of the satellite laser elevation point during satellite laser altimetry, define and evaluate the planar positioning error of the satellite laser elevation point caused by the error of the laser pointing angle in the roll angle direction. and elevation positioning error The method, the formula is,

[0133]

[0134]

[0135] in, This refers to the error in the laser pointing angle in the roll angle direction; This is the laser ranging value. This represents the angular component of the laser pointing angle in the roll angle direction;

[0136] Step S43: Based on the principle that the error of the laser pointing angle in the yaw angle direction affects the geometric positioning error of the satellite laser elevation point during satellite laser altimetry, define and evaluate the planar positioning error of the satellite laser elevation point caused by the error of the laser pointing angle in the yaw angle direction. and elevation positioning error The method, the formula is,

[0137]

[0138]

[0139] in, This represents the error in the laser pointing angle along the yaw angle direction. This is the laser ranging value. This refers to the laser pointing angle;

[0140] Step S44: Since the aforementioned errors propagate independently, the plane error of the satellite laser elevation point caused by the laser pointing angle error is evaluated. and elevation error The formula is,

[0141]

[0142]

[0143] Step S5: Since the various errors in steps S1-S4 propagate independently, the final plane and elevation errors of the satellite laser elevation point are the combined result of the impact of the various errors in steps S1-S4 on the plane and elevation accuracy. The following formula is used to comprehensively evaluate the overall impact of various errors during satellite laser altimetry on the plane and elevation accuracy of the laser elevation point, thus obtaining the final plane positioning error of the satellite laser elevation point. and elevation positioning error That is, the quantitative assessment results of the plane and elevation accuracy of satellite laser elevation points:

[0144]

[0145] .

[0146] By adopting the above-disclosed technical solution of this invention, the following beneficial effects are obtained:

[0147] (1) Starting from the influence mechanism of various errors in the satellite laser altimetry on the geometric accuracy of the laser elevation point, the main error sources are quantitatively derived to influence the plane and elevation positioning accuracy of the satellite laser elevation point. This is a new and effective method for evaluating the geometric positioning accuracy of the satellite laser elevation point.

[0148] (2) The comprehensive impact of attitude measurement error, orbit measurement error, time error and laser pointing angle error on the plane and elevation positioning accuracy of the laser elevation point is fully considered, so that the final evaluation results are scientific, accurate and reliable.

[0149] (3) Compared with the traditional method of using typical test areas to carry out the geometric accuracy verification experiment of satellite laser elevation points, the method of the present invention is simple to operate, has extremely low cost, and can be applied to the quantitative evaluation of the geometric accuracy of satellite laser elevation points in any region and at any time, and has great practical advantages.

[0150] (4) In addition to being used for the geometric accuracy assessment of satellite laser elevation points, the mechanism and quantitative formula of the error affecting the plane and elevation positioning accuracy of laser elevation points can also provide a reference for the design of technical indicators in the development of laser altimetry satellites.

[0151] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for quantitatively evaluating the geometric accuracy of remote sensing satellite laser elevation points, characterized in that, include: S1 quantitatively assesses the plane positioning error of satellite laser elevation points caused by attitude measurement data errors during satellite laser altimetry. and elevation positioning error ; S2 quantitatively assesses the plane positioning error of satellite laser elevation points caused by orbit measurement data errors during satellite laser altimetry. and elevation positioning error ; S3 quantitatively assesses the satellite laser elevation point planar positioning error caused by time errors in laser elevation measurement time, attitude measurement time, and orbit measurement time during satellite laser altimetry. and elevation positioning error ; S4 quantitatively assesses the plane positioning error of satellite laser elevation points caused by laser pointing angle error during satellite laser altimetry. and elevation positioning error ; The S5 comprehensive evaluation assesses the overall impact of various errors during satellite laser altimetry on the horizontal and vertical accuracy of satellite laser elevation points, obtaining the final horizontal positioning error of the satellite laser elevation points. and elevation positioning error This refers to the quantitative assessment results of the plane accuracy and elevation accuracy of satellite laser elevation points, calculated using the following formula: ； ； Step S1 specifically includes: S11 defines and evaluates the plane error of the satellite laser elevation point caused by attitude pitch angle error. and elevation error The method, the formula is: ； ； in, This refers to the satellite's attitude pitch angle error; This is the laser ranging value. This represents the angular component of the laser pointing angle of the laser altimeter in the elevation direction; S12 defines the evaluation of the satellite laser elevation point plane error caused by attitude roll angle error. and elevation error The method, the formula is, ； ； in, This refers to the satellite attitude roll angle error. This is the laser ranging value. This represents the angular component of the laser pointing angle of the laser altimeter in the roll angle direction; S13 defines and evaluates the plane error of satellite laser elevation points caused by attitude yaw angle error. and elevation error The method, the formula is, ； ； in, This refers to the satellite's attitude yaw angle error. This is the laser ranging value. This refers to the laser pointing angle; S14 defines the plane error of the satellite laser elevation point caused by the error in the attitude measurement data. and elevation error The method, the formula is, ； 。 2. The method for quantitatively evaluating the geometric accuracy of remote sensing satellite laser elevation points according to claim 1, characterized in that, In step S2, the orbital radial error during satellite laser altimetry is considered. Error along the track and vertical track error The principle of the influence of geometric positioning error of laser elevation points is defined, and the plane error of laser elevation points caused by track measurement error is evaluated. and elevation error The method, the formula is: ； 。 3. The method for quantitatively evaluating the geometric accuracy of remote sensing satellite laser elevation points according to claim 1, characterized in that, Step S3 specifically includes: S31, Define and evaluate the time error of laser altimetry. Caused by satellite laser elevation point plane error and elevation error The method, the formula is: ； ； in, For the satellite's flight speed; S32, Defines the evaluation of orbit measurement time error Caused by satellite laser elevation point plane error and elevation error The method, the formula is: ； ； S33, Define and evaluate attitude measurement time error Caused by satellite laser elevation point plane error and elevation error The method, the formula is: ； ； ； ； ； ； ； ； in, , , These are the laser elevation point plane errors caused by satellite attitude pitch angle, roll angle, and yaw angle errors due to attitude measurement time errors. , , These are the laser elevation errors caused by satellite attitude measurement time errors, specifically the errors in satellite pitch, roll, and yaw angles, which in turn lead to the elevation errors of the laser elevation points. , , These represent the stability of the satellite's attitude in the pitch, roll, and yaw directions, respectively. S34 defines and evaluates the horizontal errors of satellite laser elevation points caused by various time-related errors. and elevation error The method, the formula is, ； 。 4. The method for quantitatively evaluating the geometric accuracy of remote sensing satellite laser elevation points according to claim 1, characterized in that, Step S4 specifically includes: S41 defines and evaluates the plane error of the satellite laser elevation point caused by the error in the elevation direction of the laser pointing angle. and elevation error The method, the formula is: ； ； in, This represents the error in the laser pointing angle along the pitch direction; This is the laser ranging value. This represents the angular component of the laser pointing angle in the elevation direction; S42 defines the evaluation of the satellite laser elevation point plane error caused by the error in the roll angle direction of the laser pointing angle. and elevation error The method, the formula is, ； ； in, This refers to the error in the laser pointing angle in the roll angle direction; This is the laser ranging value. This represents the angular component of the laser pointing angle in the roll angle direction; S43 defines and evaluates the plane error of the satellite laser elevation point caused by the error in the yaw angle direction of the laser pointing angle. and elevation error The method, the formula is, ； ； in, This represents the error in the laser pointing angle along the yaw angle direction. This is the laser ranging value. This refers to the laser pointing angle; S44 defines the assessment of the plane error of the satellite laser elevation point caused by the laser pointing angle error. and elevation error The method, the formula is, ； 。

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