CN108036777B - Satellite phase center indirect measurement method - Google Patents
Satellite phase center indirect measurement method Download PDFInfo
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- CN108036777B CN108036777B CN201711009983.5A CN201711009983A CN108036777B CN 108036777 B CN108036777 B CN 108036777B CN 201711009983 A CN201711009983 A CN 201711009983A CN 108036777 B CN108036777 B CN 108036777B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
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- General Physics & Mathematics (AREA)
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Abstract
The invention provides a satellite phase center indirect measurement method, which comprises the following steps: designing a satellite reference block; setting a prism of the object to be measured; and step three, determining the absolute position of the phase center on the satellite by measuring the relative position relation between the prism of the measured object and the reference block. The invention solves the problems that the origin of the coordinate system of the satellite body can not be directly used as a measuring reference, and the phase center of the measured object can not be directly measured or indirectly measured by contacting the phase center of the measured object of the satellite, and has simple process and convenient operation.
Description
Technical Field
The invention relates to a satellite measuring method, in particular to an indirect measuring method for a phase center on a satellite.
Background
For the double-star flying formation, in order to meet certain height measurement precision requirements in an interference height measurement mode, higher requirements are generally provided for the measurement precision of an inter-star baseline. In order to meet the requirement of high-precision baseline measurement, the satellite is further required to be capable of accurately acquiring the absolute positions of the payload and the phase center of the GPS antenna in the satellite body coordinate system. On one hand, however, the origin of the satellite body coordinate system is located at the center of the satellite-rocket separation surface, is a virtual point in space, and cannot be directly used as a measurement reference; on the other hand, the phase center of the object to be measured, such as the payload and the GPS antenna, is usually located inside the body of the object to be measured, and cannot be directly measured or touched. Under the condition, the phase center of the measured object needs to be indirectly measured and obtained through a special method, and the method is most directly and effectively the method for determining the absolute position of the phase center on the satellite through designing the satellite reference block and the reference prism, setting the prism of the measured object and measuring the relative positions and the angle relations of the prism of the measured object, the reference block and the reference prism.
At present, no explanation or report of the similar technology of the invention is found, and similar data at home and abroad are not collected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a satellite phase center indirect measurement method, which solves the problems that the origin of a satellite body coordinate system can not be directly used as a measurement reference, and the phase center of a measured object of a satellite can not be directly measured or indirectly measured by contacting the phase center of the measured object of the satellite, and has simple process and convenient operation.
According to one aspect of the invention, a method for indirectly measuring a phase center on a satellite is provided, which is characterized by comprising the following steps:
designing a satellite reference block;
setting a prism of the object to be measured;
and step three, determining the absolute position of the phase center on the satellite by measuring the relative position relation between the prism of the measured object and the reference block.
Preferably, the reference block is composed of at least one block, the reference block provides at least three mutually perpendicular measurable reference surfaces, the normal of each reference surface of the reference block is parallel to the satellite body coordinate system, namely, a local coordinate system of the reference block established by taking the normal of each reference surface as a coordinate axis is parallel to and in the same direction with the satellite body coordinate system by taking the geometric center of the reference block as an origin, and the size of the reference block is determined and known; the absolute position of the reference block in the satellite body coordinate system is obtained through the design and measurement of the reference block and is used as an indirect reference for the measurement of the measured phase center, and the problem that the satellite body coordinate system cannot be directly obtained as the reference for measuring the absolute position is solved.
Preferably, the coordinates of the phase center position of the measured object are determined and known in a measured object local coordinate system established by taking the geometric center of the prism of the measured object as an origin and taking the normal of the mirror surface of each prism as a coordinate axis; in addition, each reference mirror surface normal of the measured object prism is parallel to the satellite body coordinate system.
Preferably, the third step is to obtain the relative position relationship between the local coordinate system of the measured object and the local coordinate system of the reference block by respectively measuring the relative distance between each reference surface of the edge environment of the measured object and each reference surface parallel to the reference block; and then calculating and acquiring the absolute position of the phase center under the satellite body coordinate system according to the known coordinate of the phase center of the measured object under the local coordinate system of the measured object and the absolute position of the reference block under the satellite body coordinate system.
Compared with the prior art, the invention has the following beneficial effects: the method for determining the absolute position of the phase center on the satellite most directly and effectively determines the absolute position of the phase center on the satellite by designing the reference block and the prism of the object to be measured and measuring the relative position relation between the prism of the object to be measured and the reference block. The problem that the origin of a coordinate system of a satellite body can not be directly used as a measuring reference, and the phase center of a measured object can not be directly measured or indirectly measured by contacting the phase center of the measured object of the satellite is solved, and the method is simple in process and convenient to operate.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of the method for indirect measurement of phase center on satellite according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1, the method for indirectly measuring the phase center on the satellite of the present invention comprises the following steps:
designing a satellite reference block;
setting a prism of the object to be measured;
and step three, determining the absolute position of the phase center on the satellite by measuring the relative position relation between the prism of the measured object and the reference block.
The reference block is composed of at least one block, the reference block provides at least three measurable reference surfaces which are perpendicular to each other, the normal of each reference surface of the reference block is parallel to the satellite body coordinate system, namely, a local coordinate system of the reference block established by taking the geometric center of the reference block as the origin and the normal of each reference surface as the coordinate axis is parallel to and in the same direction as the satellite body coordinate system, and the size of the reference block is determined and known; the absolute position of the reference block in the satellite body coordinate system is obtained through the design and measurement of the reference block and is used as an indirect reference for the measurement of the measured phase center, and the problem that the satellite body coordinate system cannot be directly obtained as the reference for measuring the absolute position is solved.
Determining the spatial position relation between the geometric center of the prism of the object to be measured and the phase center of the object to be measured, namely determining and knowing the position coordinates of the phase center of the object to be measured under a local coordinate system of the object to be measured, which is established by taking the geometric center of the prism of the object to be measured as an original point and taking the normal of the mirror surface of each prism as a coordinate axis; in addition, each reference mirror surface normal of the measured object prism is parallel to the satellite body coordinate system.
Thirdly, the relative distance between each reference surface of the edge environment of the object to be measured and each reference surface parallel to the reference block is measured respectively, so that the relative position relation between the local coordinate system of the object to be measured and the local coordinate system of the reference block can be obtained; furthermore, the absolute position of the phase center in the satellite body coordinate system can be calculated and obtained according to the known coordinates of the phase center of the measured object in the local coordinate system of the measured object and the absolute position of the reference block in the satellite body coordinate system.
The origin of the satellite body coordinate system is positioned in the center of the satellite-rocket separation surface, is a virtual point in space and cannot be directly used as a measurement reference; in addition, the phase center of the object to be measured, such as the payload and the GPS antenna, is usually located inside the body of the object to be measured, and cannot be directly measured or touched. Referring to fig. 1, to solve the problem, the present invention provides a method for indirectly measuring a phase center on a satellite, including: designing a satellite reference block; arranging a prism of a measured object; the method is used for determining the absolute position of the phase center on the satellite by measuring the relative position relationship between the prism of the measured object and the reference block.
The satellite reference block 2 provides three mutually perpendicular measurable reference surfaces, specifically a first measurable reference surface 4, a second measurable reference surface 5 and a third measurable reference surface 6, the satellite reference block 2 uses a geometric center point as an origin and uses the normal of each reference surface as a coordinate axis to establish a reference block local coordinate system 3, the normal of each reference surface of the satellite reference block 2 is parallel to the satellite body coordinate system 1, namely the reference block local coordinate system 3 is parallel and same-directional to the satellite body coordinate system 1, and the size of the satellite reference block 2 is determined and known; the absolute position of the satellite reference block 2 in the satellite body coordinate system 1 is obtained through the design and measurement of the satellite reference block 2, and the absolute position is used as an indirect reference for the measurement of the measured phase center 8.
Determining the spatial position relation between the geometric center of the prism 7 of the object to be measured and the phase center 8 of the object to be measured, namely determining and knowing the position coordinates of the phase center 8 of the object to be measured under a local coordinate system 9 of the object to be measured, which is established by taking the geometric center of the prism of the object to be measured as an original point and taking the normal of the mirror surface of each prism as a coordinate axis; in addition, each reference mirror surface normal of the prism 7 to be measured is parallel to the satellite body coordinate system, that is, the local coordinate system 9 to be measured is parallel and co-directional to the satellite body coordinate system 1.
The method is characterized in that relative distances between a first reference surface 10, a second reference surface 11 and a third reference surface 12 of the prism 7 of the measured object and a third measurable reference surface 6, a first measurable reference surface 4 and a second measurable reference surface 5 of the reference block 2 are respectively measured by using instruments such as a laser tracker, a three-coordinate measuring instrument and the like, so that the relative position relation between the local coordinate system 9 of the measured object and the local coordinate system 3 of the reference block 2 can be obtained; further, the absolute position of the phase center 8 of the measured object in the satellite body coordinate system 1 can be calculated and obtained according to the known coordinates of the phase center 8 of the measured object in the local coordinate system 9 of the measured object and the known absolute position of the reference block 2 in the satellite body coordinate system 1.
Theoretically, position data of countless points can be measured on each datum plane of the measured object prism, and the more the measured data is, the more accurate the result is.
In summary, the present invention provides a method for determining the absolute position of the phase center on the satellite by designing the reference block and the prism of the object to be measured, and measuring the relative position relationship between the prism of the object to be measured and the reference block. The problem that the origin of a coordinate system of a satellite body can not be directly used as a measuring reference, and the phase center of a measured object can not be directly measured or indirectly measured by contacting the phase center of the measured object of the satellite is solved, and the method is simple in process and convenient to operate.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (4)
1. An indirect measurement method of a phase center on a satellite is characterized by comprising the following steps:
designing a satellite reference block;
setting a prism of the object to be measured;
and step three, determining the absolute position of the phase center of the measured object on the satellite by measuring the relative position relation between the prism of the measured object and the reference block.
2. The method of claim 1, wherein the reference block is composed of at least one block, the reference block provides at least three measurable reference planes perpendicular to each other, each reference plane normal of the reference block is parallel to the satellite body coordinate system, that is, a local reference block coordinate system established by taking each reference plane normal as an origin point and each reference plane normal as a coordinate axis is parallel to and in the same direction as the satellite body coordinate system, and the size of the reference block is determined and known; the absolute position of the reference block in the satellite body coordinate system is obtained through the design and measurement of the reference block and is used as an indirect reference for the measurement of the measured phase center, and the problem that the satellite body coordinate system cannot be directly obtained as the reference for measuring the absolute position is solved.
3. The indirect measurement method of phase center on satellite according to claim 1, wherein the coordinate of phase center position of the measured object is determined and known in the local coordinate system of the measured object established by using the geometric center of the prism of the measured object as the origin and the normal of the mirror surface of each prism as the coordinate axis; in addition, each reference mirror surface normal of the measured object prism is parallel to the satellite body coordinate system.
4. The indirect measurement method of phase centers on satellites according to claim 1, wherein the third step is to obtain the relative position relationship between the local coordinate system of the measured object and the local coordinate system of the reference block by measuring the relative distance between each reference plane of the measured object edge and each reference plane parallel to the reference block; and then calculating and acquiring the absolute position of the phase center under the satellite body coordinate system according to the known coordinate of the phase center of the measured object under the local coordinate system of the measured object and the absolute position of the reference block under the satellite body coordinate system.
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| CN108036777B true CN108036777B (en) | 2020-07-24 |
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Citations (6)
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| DE4210929C1 (en) * | 1992-04-02 | 1993-07-08 | Deutsche Aerospace Ag, 8000 Muenchen, De | |
| JPH1022551A (en) * | 1996-07-02 | 1998-01-23 | Mitsubishi Electric Corp | Solid laser exciting module |
| US7129889B1 (en) * | 2005-10-10 | 2006-10-31 | The Boeing Company | User segment-based lever arm correction via prescribed maneuver for high-accuracy navigation |
| CN102679945A (en) * | 2012-06-05 | 2012-09-19 | 哈尔滨工业大学 | Satellite pointing and attitude measuring method and device based on three-point reflecting cooperation |
| CN106772915A (en) * | 2017-02-20 | 2017-05-31 | 上海卫星装备研究所 | A kind of installation method of satellite benchmark prism |
| CN107121123A (en) * | 2017-05-18 | 2017-09-01 | 上海卫星工程研究所 | Satellite precision unit measuring method |
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2017
- 2017-10-25 CN CN201711009983.5A patent/CN108036777B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4210929C1 (en) * | 1992-04-02 | 1993-07-08 | Deutsche Aerospace Ag, 8000 Muenchen, De | |
| JPH1022551A (en) * | 1996-07-02 | 1998-01-23 | Mitsubishi Electric Corp | Solid laser exciting module |
| US7129889B1 (en) * | 2005-10-10 | 2006-10-31 | The Boeing Company | User segment-based lever arm correction via prescribed maneuver for high-accuracy navigation |
| CN102679945A (en) * | 2012-06-05 | 2012-09-19 | 哈尔滨工业大学 | Satellite pointing and attitude measuring method and device based on three-point reflecting cooperation |
| CN106772915A (en) * | 2017-02-20 | 2017-05-31 | 上海卫星装备研究所 | A kind of installation method of satellite benchmark prism |
| CN107121123A (en) * | 2017-05-18 | 2017-09-01 | 上海卫星工程研究所 | Satellite precision unit measuring method |
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