Effects of polarimetric dispersion on future spaceborne P‐band ultra‐wideband SAR. Issue 22 (1st November 2018)

• Record Type: Journal Article
• Authors: Li, Jinhui; Ji, Yifei; Zhang, Yongsheng; Zhang, Qilei; Huang, Haifeng; Dong, Zhen
• Is Part Of: Electronics letters. Volume 54:Issue 22(2018)
• Page Start: 1292
• Page End: 1294
• Publication Date: 2018-11-01
• Subjects: spaceborne radar -- radar imaging -- Faraday effect -- radar polarimetry -- synthetic aperture radar -- remote sensing by radar; ionospheric Faraday rotation -- spaceborne synthetic aperture radar polarimetric application -- future spaceborne P‐band ultra‐wideband SAR -- PD effect -- spaceborne P‐band ultra‐wideband SAR system -- high‐resolution detection -- future P‐band ultra‐wideband system -- existent model -- high disturbance -- polarimetric dispersion effect -- narrow‐band hypothesis -- polarimetric scattering matrix -- FR effect; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2018.5477
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Spaceborne synthetic aperture radar (SAR) polarimetric application, operating at P‐band, is significantly influenced by ionospheric Faraday rotation (FR). Various researches have been published to evaluate the FR effect on polarimetric scattering matrix, nevertheless all of which are based on the narrow‐band hypothesis and ignore the polarimetric dispersion (PD) effect caused by FR for its high disturbance within the bandwidth. The existent model is no longer well applicable to the future P‐band ultra‐wideband system with benefits of the high‐resolution detection of the subsurface or obscured targets. A novel analytical model of PD based on the frequency‐domain range pulse compression is proposed and analysed in this Letter, and the simulation results indicate the spaceborne P‐band ultra‐wideband SAR system is seriously influenced by the PD effect.