Operation of GeoSAR foliage penetration modes in spectrum regulated environment

Davis, Mark E.; Reis, James J.

doi:10.1109/radarconf.2015.7411938

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…These instruments provide valuable data sets for advancing the development of theory and applications of PolSAR. However, it is common to find that these PolSAR systems are susceptible to the radio frequency interference (RFI), especially in low‐frequency band (Davis & Reis, ; Le et al, ; Meyer et al, ; Pederick & Cervera, ; Reigber & Ferro‐Famil, ). With the ever‐growing demand for radio spectrum use, many civilian and military electromagnetic services share and compete for the same frequency band, especially for the synthetic aperture radar (SAR) system with large bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Mitigation of Radio Frequency Interference in PolSAR Data

2017

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Polarimetric synthetic aperture radar (PolSAR) is a very important instrument for active remote sensing. However, it is common to find that PolSAR echoes are often contaminated by incoherent electromagnetic interference, which is referred to as radio frequency interference (RFI). The analysis of RFI signatures and its influence on PolSAR data seems to be lacking in existing literatures, especially for PolSAR post products, such as the polarimetric decomposition parameters and clustering result. The goal of this paper is to reveal the link between RFI and polarization, as well as to analyze the impact of interference on PolSAR image and its post products. Qualitative and quantitative analyses of the adverse impact of RFI on the real measured NASA/Jet Propulsion Laboratory (JPL) Uninhabited Aerial Vehicle Synthetic Aperture Radar data set are illustrated from two perspectives, that is, evaluation of imaging quality and interpretation of scattering mechanisms. The point target response and effective number of looks are evaluated for assessing the distortion to focusing quality. Further, we discussed the characteristics of ultra wideband RFI and proposed a mitigation method using nonnegative matrix factorization along azimuth direction. The experimental results indicate the effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Characterization and Mitigation of Radio Frequency Interference in PolSAR Data

2017

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“…Compared with monostatic GEO SAR, it has higher resolution, longer observation time and higher system reliability [28]- [30]. In the same year, Mark E. Davis studied the topographic mapping ability of GEO SAR under the shelter of plants [31]. In 2016, Hans Martin et al put forward the design idea of daily monitoring of the whole Mediterranean region by using GEO SAR.…”

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confidence: 99%

Sub retrograde geosynchronous orbit SAR: parameter design and performance analysis

Li,

Zhang,

Liu

et al. 2023

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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In recent years, Geosynchronous synthetic aperture radar (GEO SAR) has attracted many scientists to carry out relevant research. Its research is in-depth and gradually maturing. However, conventional GEO SAR has the problems of great influence by the earth's rotation, complex timing design, uneven flight speed in the whole orbit, and non orthogonal range and azimuth resolution, which limits it's application. A new concept of sub retrograde geosynchronous orbit SAR is proposed in this paper. Compared with traditional GEO SAR, the satellite has the advantages of less influence by the earth's rotation, simple timing, uniform motion speed in the whole orbit, shorter revisit time, better resolution and small space-variant in azimuth and range. The radar parameters of sub retrograde GEO SAR are designed. Through the research, it is found that the system sensitivity and resolution no longer change with the orbit position, and its timing design does not need to consider the range migration variation. In addition, the imaging characteristics of sub retrograde GEOSAR are investigated. The results show that, the range model can meet the imaging requirements as long as it is expanded to the fourth order. After that, the influence of orbit perturbation error in sub retrograde GEO SAR is given for the first time. Last, two ways to solve observation blind area of sub retrograde GEO SAR are proposed, one is to change the orbit inclination, another way is to use the bistatic mode. Index Terms-sub retrograde orbit, geosynchronous synthetic aperture radar (GEO SAR), system parameter design, performance analysis. I. INTRODUCTION INCE geosynchronous orbit synthetic aperture radar (GEO SAR) was proposed, it has attracted the attention of many researchers because of its short revisit period and wide observation swath. Scientists from the United States, China, Britain, Germany, Italy and other countries have carried out research on system design and imaging algorithms. In 1978, K. Tomiyasu first proposed the concept of GEO SAR [1], with the support of National Aeronautics and Space Administration (NASA), the parameter analysis of GEO SAR Manuscript received xx; revised xx ; accepted xx. Date of publication xx; date of current version xx.

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Ultra Wide Band Surveillance Radar

Davis

2019

2019 IEEE Radar Conference (RadarConf)

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Operation of GeoSAR foliage penetration modes in spectrum regulated environment

Cited by 3 publications

References 7 publications

Characterization and Mitigation of Radio Frequency Interference in PolSAR Data

Characterization and Mitigation of Radio Frequency Interference in PolSAR Data

Sub retrograde geosynchronous orbit SAR: parameter design and performance analysis

Ultra Wide Band Surveillance Radar

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