The Analysis of SNR in Passive Distributed Microsatellites SAR System

Zhang Zhen-hua; Bao Zheng; Xing Meng-dao; Huang Jun-yi

doi:10.3724/SP.J.1146.2005.00442

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Zhang Zhen-hua, Bao Zheng, Xing Meng-dao, Huang Jun-yi. The Analysis of SNR in Passive Distributed Microsatellites SAR System[J]. Journal of Electronics & Information Technology, 2007, 29(1): 15-18. doi: 10.3724/SP.J.1146.2005.00442

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Zhang Zhen-hua, Bao Zheng, Xing Meng-dao, Huang Jun-yi. The Analysis of SNR in Passive Distributed Microsatellites SAR System[J]. Journal of Electronics & Information Technology, 2007, 29(1): 15-18. doi: 10.3724/SP.J.1146.2005.00442

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The Analysis of SNR in Passive Distributed Microsatellites SAR System

doi: 10.3724/SP.J.1146.2005.00442 cstr: 32379.14.SP.J.1146.2005.00442

Received Date: 2005-04-18
Rev Recd Date: 2006-04-11
Publish Date: 2007-01-19

Abstract

Abstract

The passive distributed microsatellites Synthetic Aperture Radar(SAR) system has the capabilities in improving image resolution, detecting ground moving targets and computing digital elevation models. But the input Signal-to-Noise Ratio (SNR) of the system will largely reduce compared with the active spaceborne radar because of the decrease of its receiving antennas area, which will degrade the performance of the system. This paper analyses the effect of the SNRs reduction on SAR imagery, Digital Elevation Model (DEM) and Ground Moving Target Indication (GMTI), based on the JERS-1 acted as the active satellite, and comes to a conclusion that the SNR obtained from the system would be lower than what the system required. Some methods to improve the systems output SNR by coherent or noncoherent operating are also discussed.

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References

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