A Calculation Method of Satellite Body Size Based on Light Curve

Abstract

The invention belongs to the field of ground-based optical observation, and discloses a method for calculating the size of a satellite body based on a light curve. The method includes the following steps: obtaining high-precision satellite luminosity information through observation; obtaining the visual relationship of illumination through orbit calculation and attitude calculation; observing data Usability inspection; satellite body size calculation. This method overcomes the insufficiency of radar means to observe satellites in medium and high orbits, and proposes a method to obtain the size of the satellite body by using the optical telescope observation system to obtain its length, width and height parameters. The invention can be rapidly popularized and applied to existing ground-based photoelectric detection equipment in my country, and can form a certain satellite body size determination capability without hardware modification.

Description

technical field [0001] The invention belongs to the field of ground-based photoelectric observation, and relates to a method for calculating the size of a satellite body. Background technique [0002] The size is an important physical parameter of the satellite. In addition to the body size data obtained from the design and construction, the others are obtained through various observations and measurements. The radar cross section (RCS) obtained by radar detection is generally used to characterize the satellite. the size of. But there are some limitations. First, the radar has a long band, and the radar scattering cross section is related to many factors such as satellite structure, satellite attitude, radar operating frequency, incident field polarization, and receiving antenna polarization, and is sensitive to corners. , it is easy to form a large value at the corner of the satellite, which cannot well represent the real scale of the satellite. Secondly, since the streng...

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Problems solved by technology

But there are some limitations. First, the radar has a long band, and the radar scattering cross section is related to many factors such as satellite structure, satellite attitude, radar operating frequency, incident field polarization, and receiving antenna polarization, and is sensitive to corners. , it is easy to form a large value at the corner of the satellite, which cannot well represent the real scale of the satellite

Secondly, since the strength of the radar detection signal is proportional to the fourth power of the distance, and will be affected by ground clutter and atmospheric loss, as well as its own power and operating wavelength limitations, it is generally difficult to use radar to achieve the measurement of medium and high orbit satellites

Third, the quantity obtained is the cross-sectional area and there are changes, which cannot represent the specific size of the satellite's length, width and height

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