Home
>
Journals & magazines
>
IEE Proceedings F (Communications, Radar and Sign...
>
Volume 135
Issue 4
IEE Proceedings F (Communications, Radar and Signal Processing)
Volume 135, Issue 4, August 1988
Volumes & issues:
Volume 135, Issue 4
August 1988
-
- Author(s): D.J. Daniels ; D.J. Gunton ; H.E. Scott
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, page: 277 –277
- DOI: 10.1049/ip-f-1.1988.0037
- Type: Article
- + Show details - Hide details
-
p.
277
(1)
- Author(s): D.J. Daniels ; D.J. Gunton ; H.F. Scott
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 278 –320
- DOI: 10.1049/ip-f-1.1988.0038
- Type: Article
- + Show details - Hide details
-
p.
278
–320
(43)
Subsurface radar techniques are increasingly being used for the detection and location of buried artefacts and structures within the upper regions of the earth's surface. The paper reviews the work done to date in this field, laying emphasis on the range of applications and the need for system design to match the intended application. An overall design strategy is outlined, together with a more detailed treatment of a range of topics which are relevant to effective subsurface radar operation. These include the dielectric properties of earth materials, signal modulation schemes, design and construction of suitable antennas, and methods of signal processing. Finally, an assessment is made of future prospects, both technical and commercial, for this developing area of radar technology. - Author(s): G. Junkin and A.P. Anderson
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 321 –329
- DOI: 10.1049/ip-f-1.1988.0039
- Type: Article
- + Show details - Hide details
-
p.
321
–329
(9)
Experimental results are presented which illustrate the capabilitity of a single-frequency microwave holographic scheme to image both metallic and plastic pipes at a depth of 0.33 m in wet soil with a covering layer of concrete paving stones. The data acquisition system utilises a crossed dipole antenna scanning above the interface recording two orthogonal polarisations at each point on a two-dimensional grid, from which improved surface rejection is obtained. Maximum imaging depth is limited primarily by the ratio of soil attenuation to surface and environmental effects on the antenna response, thereby preventing any significant increase in the conditions quoted. Theoretical investigation into the influence of the lossy dielectric half-space on the synthetic aperture in a one-dimensional model has illustrated that scan height is an important consideration for resolution and antenna system design. It is shown that scanning in close proximity (≤0.1 λ) to the interface increase both lateral and depth resolution. To take advantage of this effect, it is concluded that a noncontacting antenna operating in close surface proximity must be insensitive to height fluctuations. - Author(s): N. Osumi and K. Ueno
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 330 –342
- DOI: 10.1049/ip-f-1.1988.0040
- Type: Article
- + Show details - Hide details
-
p.
330
–342
(13)
A wideband microwave holographic method for imaging buried objects with high azimuth and range resolution is described. The method incorporates a synthetic aperture approach in pulse radar systems, originally designed for the pulse-echo imaging, to improve azimuth resolution. The resolving capability of the method is discussed in terms of controlling parameters such as the synthetic aperture length, soil conductivity and dielectric constant, and antenna beamwidth. Since the propagation velocity of electromagnetic wave in soil, which varies from soil to soil, is an essential parameter for reconstructing object images by the method, a method of minimum squared error estimation of the propagation velocity from a pulse-echo image is proposed. Results of underground object image reconstruction from real pulse-echo data is reported to demonstrate high estimation accuracy of the propagation velocity and fine resolution of the reconstructed image. - Author(s): R. Caldecott ; M. Poirier ; D. Scofea ; D.E. Svoboda ; A.J. Terzuoli
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 343 –353
- DOI: 10.1049/ip-f-1.1988.0041
- Type: Article
- + Show details - Hide details
-
p.
343
–353
(11)
The use of radar in an underground environment presents a number of practical difficulties. The paper describes a specific application to the mapping of buried utility lines, and other objects below city streets, prior to excavation for repair work or new construction. The system combines an impulse radar, using crossed polarised dipole antennas for transmitting and receiving, respectively, with a computer for data processing and map printing. The system is self contained and is mounted in a van, so that maps may be recorded wherever the ground is sufficiently level for operation of the wheeled antenna cart. Maps are presented as grey-scale plan views or vertical sections. - Author(s): A.D. Olver and L.G. Cuthbert
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 354 –361
- DOI: 10.1049/ip-f-1.1988.0042
- Type: Article
- + Show details - Hide details
-
p.
354
–361
(8)
The use of FMCW radar for the detection of hidden objects at short distances is described. The factors which influence the type of radar and the optimum parameters for FMCW radar are discussed. It is shown that FMCW radar is good for situations where a high resolution is needed at a short distance, such as the detection of flaws in building materials. Practical systems are described. Both FFT and non-Fourier methods are used for processing the radar returns. Multiple targets hidden in media can be revealed by digital subtraction or template matching using a numerical optimisation procedure. The radar is shown to be capable of producing images of targets. - Author(s): R.J. Chignell ; P.A. Jackson ; K. Madani
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 362 –370
- DOI: 10.1049/ip-f-1.1988.0043
- Type: Article
- + Show details - Hide details
-
p.
362
–370
(9)
A survey of the developments in ground-probing radar technology undertaken by the team at ERA Technology between 1980 and 1985 is presented. These span all of the contributing areas of technology including hardware, software and field experience. Radars of advanced design with wide dynamic ranges, high resolution and capable of much higher data rates than previous systems have been built. They incorporate important developments in antennas, pulse generators and receiver design. The use of digital circuitry wherever possible has allowed great flexibility in the design, allowing signal processing to be readily included in real-time systems. A hierarchy of software has been implemented ranging from simple detection procedures to advanced target recognition algorithms. Ground-probing radars have been operated in a wide range of conditions for the detection of plastic mines, the inspection of civil engineering structures and the assessment of mineral resources. - Author(s): G.K.A. Oswald
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 371 –379
- DOI: 10.1049/ip-f-1.1988.0044
- Type: Article
- + Show details - Hide details
-
p.
371
–379
(9)
The article begins by setting out issues of policy and system architecture and design which have informed the development of impulse radar systems at CCL. We then describe in outline and illustrate various systems including a helicopter-mounted surveying instrument, a ground-based impulse radar test-bed, and an instrument for investigating performance in a borehole. The thrust of the article is that the current state of the technique suits it for application in the form of purpose-designed systems by experienced operators under defined conditions rather than general-purpose systems in the hands of unqualified users. - Author(s): D.M. McCann ; P.D. Jackson ; P.J. Fenning
- Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, p. 380 –391
- DOI: 10.1049/ip-f-1.1988.0045
- Type: Article
- + Show details - Hide details
-
p.
380
–391
(12)
The use of ground probing radar has increased significantly over the past few years in the civil engineering field. As a geophysical technique it has much in common with the seismic reflection method. The information derived from both methods is displayed as a time/distance cross-section, which is very similar in appearance to a geological cross-section. However, the time section can only be converted to a depth section when the velocity of propagation of the seismic or electromagnetic pulse within each of the resolved layers is known. The use of these two methods in shallow geological surveys at the site investigation stage of a civil engineering construction is reviewed and illustrated by case histories. It is shown that the development of high-frequency sources has improved the resolution obtainable from the seismic reflection method while the gradual improvement in instrumentation has resulted in greater penetration being achieved with the radar method. A consideration of the penetration shows that with both methods it is largely controlled by the moisture content of the superficial deposits, which has a very strong influence on the attenuation of both seismic and electromagnetic energy. The effect is, in fact, complementary since a dry material will transmit electromagnetic energy better than a saturated one, while the converse is true for seismic energy. - Source: IEE Proceedings F (Communications, Radar and Signal Processing), Volume 135, Issue 4, page: 392 –392
- DOI: 10.1049/ip-f-1.1988.0046
- Type: Article
- + Show details - Hide details
-
p.
392
(1)
Editorial: Subsurface radar
Introduction to subsurface radar
Limitations in microwave holographic synthetic aperture imaging over a lossy half-space
Detection of buried plant
Underground mapping of utility lines using impulse radar
FMCW radar for hidden object detection
Early developments in ground-probing radar at ERA Technology Ltd.
Geophysical radar design
Comparison of the seismic and ground probing radar methods in geological surveying
Guest Editors
Most viewed content for this Journal
Article
content/journals/ip-f-1
Journal
5
Most cited content for this Journal
We currently have no most cited data available for this content.