SAR satellite simulated on-orbit load data obtaining system and obtaining method

A technology of payload data and satellite simulation, which is applied to radio wave measurement systems, simulation devices and instruments of space navigation conditions, etc. The effect of many computing resources, low cost and low hardware requirements

Active Publication Date: 2017-06-13
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

The paper "A Fast Simulation Method for Interferometric SAR Complex Image Data" is a method for deriving SAR data based on software simulation method. The accuracy of the result is restricted by the software model, which is unrealistic and cannot be used to verify the ground station imaging system.

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  • SAR satellite simulated on-orbit load data obtaining system and obtaining method
  • SAR satellite simulated on-orbit load data obtaining system and obtaining method

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Embodiment Construction

[0031] The invention discloses a method for acquiring SAR satellite simulated on-orbit load data, and builds a SAR satellite simulated on-orbit load data acquisition system. The system consists of SAR satellite, mission planning computer, navigation signal simulator, attitude and orbit control ground equipment, measurement and control ground equipment, SAR echo simulator and payload data receiving equipment. Such as figure 1 shown.

[0032] SAR satellite is an actual remote sensing satellite product with SAR as the payload. It has the functions of sending telemetry parameters and receiving remote control commands; it can receive navigation satellite signals for positioning and orbit determination; it has the function of on-orbit attitude orbit control; it can perform SAR imaging and integrate Echo signals, imaging mode information, radar working parameter information, imaging time and duration information, imaging process positioning and orbit determination information, and a...

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Abstract

The invention relates to an SAR satellite simulated on-orbit load data obtaining system and obtaining method. According to SAR satellite imaging parameters, SAR echo data is manufactured and is stored in a task planning computer; a navigation signal simulator and an attitude and orbit control ground equipment synchronically output on-orbit simulated flight relevant excitation to an SAR satellite to execute the simulated on-orbit flight; an imaging planning instruction is sent to the SAR satellite; an imaging mode, radar work parameter information, imaging moment, imaging duration, imaging process attitude information and load data downloading moment are transmitted to the SAR satellite. When the preset SAR satellite imaging moment is reached, an echo signal is sent to the SAR satellite; the SAR satellite packs formed load data; when the preset SAR satellite load data downloading moment is reached, load data receiving equipment receives a load data signal sent by the SAR satellite; demodulation receiving and restoration are performed, so that the load data receiving is completed.

Description

technical field [0001] The invention relates to a SAR satellite simulated on-orbit load data acquisition system and an acquisition method, belonging to the technical field of spacecraft comprehensive testing. Background technique [0002] SAR payload data refers to the sum of frame data formed corresponding to each valid PRI during the SAR satellite imaging process. These data include SAR signal data and auxiliary data. According to needs, the SAR payload data may be compressed and formatted before downloading. According to different imaging modes, the data segmentation method, data rate, and data format will be different, but follow the design guidelines. Auxiliary data is the important data of auxiliary SAR imaging that is downloaded simultaneously with the SAR signal data, mainly including the parameters of the SAR payload itself such as the imaging mode word and the status of the payload system, and also other important data of the SAR satellite such as positioning and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40B64G7/00
CPCB64G7/00G01S7/4052
Inventor 安亮于忠江张庆君刘勇刘滕冲侯锐胡杰田方向永清齐天乐
Owner BEIJING INST OF SPACECRAFT SYST ENG
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