Proceedings of the 1988 IEEE National Radar Conference最新文献_第3页

Use of a variance estimator for interferometer angle accuracy 使用方差估计的干涉仪角度精度

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10948

M. Greenspan, H. Holt, B. P. Radza

引用次数: 0

Simulation of ocean SAR images via phase history generation 通过相位历史生成模拟海洋SAR图像

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10958

J. Bennett, J. T. Clinthorne, A. O. Scheffler, J. Lyden

{"title":"Simulation of ocean SAR images via phase history generation","authors":"J. Bennett, J. T. Clinthorne, A. O. Scheffler, J. Lyden","doi":"10.1109/NRC.1988.10958","DOIUrl":"https://doi.org/10.1109/NRC.1988.10958","url":null,"abstract":"A method for simulating an ocean synthetic-aperture radar (SAR) image is illustrated for a simple internal wave current pattern. The method calculates both the amplitude image and the radar signal history. The simulation model used consists of six stages. In the first stage, the full wave spectrum in two spatial coordinates is calculated from the wind speed and direction using the action spectral density equation. In the second stage, the pixel size is selected and used as the basis for dividing the spectrum into large and small scale motions. Realizations for the large-scale ocean surface height and velocity are then calculated. In the third stage, the sensor wavelength and geometry are used to calculate the small scale statistics (radar cross section, coherence time, root-mean square (RMS), radial velocity and RMS slope). In the fourth stage, an autoregressive method is used to generate a realization of the surface reflectivity history that is consistent with the radial velocity and the radial velocity variance. In the fifth stage, the signal history is generated by summing the reflectivities at the proper times with the appropriate antenna weighting function for the SAR. As a consequence of this process, speckle is automatically included in the signal. In the final stage, the SAR image can be created by using any of the traditional ways to process the signal history, including variable focusing and multilook processing.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125500111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intermediate frequency transmit/receive modules for low-sidelobe phased array application 低旁瓣相控阵中频发射/接收模块

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10926

H. Aumann, F.G. Willwerth

引用次数: 6

Waveform trade-offs for medium PRF air-to-air radar 中PRF空对空雷达的波形权衡

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10947

R. Nevin

{"title":"Waveform trade-offs for medium PRF air-to-air radar","authors":"R. Nevin","doi":"10.1109/NRC.1988.10947","DOIUrl":"https://doi.org/10.1109/NRC.1988.10947","url":null,"abstract":"The author determines what drives selection of the mean pulse repetition frequency (PRF) for use in current air-to-air radar system design, and what points these factors become critical. Data are presented that indicate that the relationship between velocity blanking and PRF is the important factor; approximate minimum PRF values for the cases considered are provided. Selection of the average PRF and the transmitted pulse width control the pattern of blind zones in unambiguous range-Doppler space. In addition, selection of the compressed pulse width affects losses, signal-to-clutter ratio, and false alarm opportunities, as well as the ability to resolve range ambiguity and reject ghosts. The present study was also used to determine the effect of ground moving target (GMT) rejection by blanking of the unambiguous Doppler signal. This was shown to range from 0.2 to 1.5 dB. the effect of resolving Doppler ambiguity before declaring a target was shown to be about 1 dB. The effect of changes in range resolution on target detection was shown to be small. These last points show tradeoffs between processing complexity and increased performance. Velocity ambiguity resolution and reduced compressed pulse width cause predictable increases in processing requirements. GMT rejection based on resolved Doppler cause a less well-defined increase in the postprocessor workload.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131622204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Iterative noncoherent angular superresolution (radar) 迭代非相干角超分辨(雷达)

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10940

M. A. Richards

引用次数: 66

SAR image quality effects of damped phase and amplitude errors 阻尼相位和振幅误差对SAR图像质量的影响

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10931

J. Zelenka, T. Falk

引用次数: 2

A statistical model for radar target detection in clutter 杂波条件下雷达目标检测的统计模型

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10965

C. Baker, J. M. Pink, R. Tough

引用次数: 3

Advanced techniques for extending synthetic aperture radar (SAR) depth of focus under arbitrary aircraft maneuvers 在飞机任意机动情况下扩展合成孔径雷达(SAR)聚焦深度的先进技术

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10936

F. Weindling

{"title":"Advanced techniques for extending synthetic aperture radar (SAR) depth of focus under arbitrary aircraft maneuvers","authors":"F. Weindling","doi":"10.1109/NRC.1988.10936","DOIUrl":"https://doi.org/10.1109/NRC.1988.10936","url":null,"abstract":"Ground mapping by synthetic-aperture radar (SAR) is sensitive to the motion of the airborne radar platform. Current methods for compensation use motion compensation (i.e. correction of the phases of all radar return signals by the phase of the map reference point (MRP) echoes) estimated from inertial sensor outputs, and a variable pulse repetition frequency (PRF). These common approaches are shown to be equivalent to a special case of bifocal mapping: a mapping in which at least two points in space are in sharp focus. A method is presented which generalizes this process to a trifocal process where the use of an additional degree of freedom in the signal design permits specifying three independent focal points in the region to be mapped. The plane defined by these three foci, which need not be a horizontal plane, contains a region of improved map sharpness. The trifocal method is implemented by using inertial sensor outputs, in real time, to modify parameters of the radar signals generated by the radar exciter receiver. The subsequent processing is conventional. Results are presented and compared with performance predictions based on existing analyses.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127358778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The design of SAR motion compensation systems incorporating strapdown inertial measurement units 结合捷联惯性测量单元的SAR运动补偿系统设计

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10933

T. A. Kennedy

引用次数: 7

A VHE radar to make terrain elevation models through tropical jungle VHE雷达通过热带丛林制作地形高程模型

Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10928

R. Vickers, R. Lowry, A. Schmidt

引用次数: 1