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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 5. Отображено 5.
10-07-2013 дата публикации

Satellite-borne synthetic aperture radar (SAR) echo signal simulation method based on non-stop walking model

Номер: CN103197291A
Автор: Wang Pengbo, Chen Jie, Liu Yueshan, Wang Weijie, Men Zhirong
Принадлежит:

The invention discloses a satellite-borne synthetic aperture radar (SAR) echo signal simulation method based on a non-stop walking model. The method includes the following steps: step one, determining a simulation center moment; step two, obtaining a Doppler parameter; step three, obtaining the distance vector between each impulse transmission moment antenna phase center and each ground target; step four, obtaining an instantaneous Doppler parameter of echo data corresponding to the ground targets, of impulse transmission moments; step five, determining the receiving moment of each pulse; step six, obtaining an instantaneous Doppler parameter corresponding to the echo data, of ground target receiving moments; and step seven, obtaining simulation echo data. By means of the satellite-borne SAR echo signal simulation method based on the non-stop walking model, an obtained calculated result has high precision, accurate simulation of the echo data can be achieved. The satellite-borne SAR echo ...

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Номер записи: 1
24-10-2012 дата публикации

Monopulse foresight imaging processing method of missile-borne/airborne radar

Номер: CN102749620A
Автор: Wang Pengbo, He Min, Liu Yueshan, Chen Jie, Yang Wei, Men Zhirong
Принадлежит:

The invention provides a monopulse foresight imaging processing method of a missile-borne/airborne radar and belongs to the field of signal processing. First, focus processing in the range direction is finished through matched filtering processing in the range direction, and separation in the range direction of a ground target is achieved, then, distance cell migration correction processing is finished according to a relative position between a radar platform and a target area, and finally accumulation of azimuth energy is achieved through locating of the azimuth direction by using monopulse angle measurement technology, and a final imaging processing result is obtained. The processing method aims at removing a relative motion phenomenon existing between the radar carrier platform and the ground, and the relative motion between a radar carrier platform and the ground target is corrected through motion compensation processing, so that effects of the relative motion on the angle measurement ...

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Номер записи: 2
17-10-2012 дата публикации

Method for computing range ambiguity of satellite-borne synthetic aperture radar (SAR) in universal mode

Номер: CN102736073A
Автор: Wang Pengbo, Men Zhirong, Chen Jie, Liu Yueshan, Yang Wei
Принадлежит:

The invention provides a method for computing the range ambiguity of a satellite-borne synthetic aperture radar (SAR) in a universal mode and belongs to the field of signal processing. The method comprises the following steps of: reading relevant parameters of a satellite-borne SAR system; acquiring range parameters in a skew state; widening a range antenna; acquiring the number of fuzzy areas; acquiring the energy of the fuzzy areas; computing the range ambiguity of a j-th position; and drawing change curves of the range ambiguity along range positions. The method has the advantages that during acquisition of skew distance between a range antenna pattern and a satellite platform as well as a target point, an earth sphere model is employed, the situation is approximate to actual situation, and a result is accurate and reliable; during acquisition of the range ambiguity, the space geometric characteristic under the condition of large scanning angle is taken into full consideration, and the ...

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Номер записи: 3
11-07-2012 дата публикации

Geometric correction method for spotlight-mode satellite SAR (synthetic aperture radar) image

Номер: CN102565797A
Автор: Wang Pengbo, Men Zhirong, Chen Jie, Yang Wei, Li Chunsheng, Liu Yueshan
Принадлежит:

The invention discloses a geometric correction method for a spotlight-mode satellite SAR image. The method comprises the following steps: (1) reading related parameters and echo data, and constructing a positioning equation; (2) calculating the coordinates of the position vector and velocity vector of a satellite in a non-rotating geocentric coordinate system at a moment of radar illumination center according to the spatial geometric relationship between the satellite and the earth; (3) completing slope distance and Doppler frequency correction; (4) acquiring the coordinates as well as longitude and latitude of a certain pixel point (i, j) of the satellite SAR image in the non-rotating coordinate system; (5) determining whether all of the pixel points of the satellite SAR image are processed; and (6) re-dividing the latitude-longitude grid, and outputting the geometric correction result. The method provided by the invention can be used for carrying out row-by-row geometric correction on ...

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Номер записи: 4
10-10-2012 дата публикации

Calculation method of spaceborne SAR (synthetic aperture radar) equivalent noise coefficient under common mode

Номер: CN102721949A
Автор: Wang Pengbo, Men Zhirong, Chen Jie, Liu Yueshan, Yang Wei
Принадлежит:

The invention discloses a calculation method of a spaceborne SAR (synthetic aperture radar) equivalent noise coefficient under a common mode, belonging to the field of signal processing. The calculation method comprises the following steps: reading related parameters of a spaceborne SAR system, getting a geometric relation parameter of the distance between a satellite and ground when a center time beam irradiates a center point of a scene, broadening the distance to the width of an antenna, calculating a synthetic aperture time of a selected position to the jth-column position point, calculating the geometric relation parameter of the distance between the satellite and the ground of the selected position to the jth-column position point, getting the gain of the selected position point in a range antenna directional diagram, calculating the equivalent noise coefficient of the selected position point and the like. According to the calculation method disclosed by the invention, a sphere model ...

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Номер записи: 5