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LEADER 03448nam 2200673Ia 4500

001 ocn227948301;

003 OCoLC;

005 20141212063331.0;

006 m d f ;

007 cr cn|||||||||;

008 080513s2001 mdua obt f000 0 eng d;

029 0 a| DTICEb| ADA387231;

035 a| (Sirsi) o227948301;

035 a| (OCoLC)227948301;

049 a| ERE#;

074 a| 0324-A-01 (online);

086 0 a| D 101.133:837;

100 1 a| Wikner, David A.=| ^A1035447;

245 10 a| Radiometric measurements of powerline cables at 94 GHz /c| David A. Wikner and Thomas J. Pizzillo.;

260 a| Adelphi, MD :b| U.S. Army Research Laboratory,c| [2001];

300 a| 1 online resource (iii, 15 pages) :b| illustrations.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| ARL-TR ;v| 837;

500 a| Title from title screen (viewed on Feb. 3, 2011).;

500 a| "February 2001.";

504 a| Includes bibliographical references (p. 11).;

506 a| Approved for public release.;

513 a| Final;b| 1 Jan to 31 Jan 2000.;

520 a| When pilots are flying at low altitudes, they need a sensor that can help them detect and avoid wires; this need remains a high priority for all U.S. military services. Many different sensors have been considered to fulfill this need. This report presents data that were collected on powerline wires of various diameters with the use of a 94-GHz radiometer. These measurements were conducted at short range in an effort to quantify the wire signatures and to determine if a millimeter-wave radiometer could be used to help pilots avoid wires. Data are presented for seven sizes of wire as well as for the horizon background of each wire. The results show that wires down to 1/4 in. in diameter can probably be detected reliably at ranges up to 200 m with a 94-GHz radiometer that uses a 3-ft antenna, provided that the signature of the horizon background can be characterized during flight. Beyond 200 m, the results show that an image-enhancement algorithm, if proven to be adequate, or a larger antenna will probably be necessary to reliably detect most standard powerline wires.;

536 a| AMSRL-SE-RMb| PE: 62120Ab| DA PR: A142;

650 0 a| Airplanesx| Collision avoidance.=| ^A427931;

650 0 a| Electric linesx| Detection.=| ^A19860;

650 0 a| Electric linesx| Measurement.=| ^A19860;

650 0 a| Detectors.=| ^A141193;

650 17 a| Test Facilities, Equipment and Methods.2| scgdst;

650 17 a| Radiometers.2| dtict;

650 17 a| Radiometry.2| dtict;

650 27 a| Algorithms.2| dtict;

650 27 a| Measurement.2| dtict;

650 27 a| Detectors.2| dtict;

650 27 a| Wire.2| dtict;

650 27 a| Pilots.2| dtict;

650 27 a| Cables.2| dtict;

650 27 a| Millimeter waves.2| dtict;

650 27 a| Image intensification.2| dtict;

650 27 a| Flight.2| dtict;

650 27 a| Low altitude.2| dtict;

653 2 a| PE62120A;

700 1 a| Pizzillo, Thomas J.?| UNAUTHORIZED;

710 2 a| U.S. Army Research Laboratory.=| ^A367731;

830 0 a| ARL-TR (Aberdeen Proving Ground, Md.) ;v| 837.=| ^A566074;

856 40 u| http://purl.fdlp.gov/GPO/gpo2070;

949 a| Click on web addressw| ASISh| JOYNER94;

596 a| 1;

998 a| 2450313;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 2450313-1001l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 3/17/2011x| EDOCUMENTz| JERESOURCE;

Radiometric measurements of powerline cables at 94 GHz / David A. Wikner and Thomas J. Pizzillo.

Author/creator	Wikner, David A.
Other author	Pizzillo, Thomas J.
Other author	U.S. Army Research Laboratory.
Format	Electronic
Publication Info	Adelphi, MD : U.S. Army Research Laboratory, [2001]
Description	1 online resource (iii, 15 pages) : illustrations.
Supplemental Content	http://purl.fdlp.gov/GPO/gpo2070
Subjects	Airplanes--Collision avoidance. Electric lines--Detection. Electric lines--Measurement. Detectors.

Series	ARL-TR ; 837 ARL-TR (Aberdeen Proving Ground, Md.) ; 837. ^A566074
Abstract	When pilots are flying at low altitudes, they need a sensor that can help them detect and avoid wires; this need remains a high priority for all U.S. military services. Many different sensors have been considered to fulfill this need. This report presents data that were collected on powerline wires of various diameters with the use of a 94-GHz radiometer. These measurements were conducted at short range in an effort to quantify the wire signatures and to determine if a millimeter-wave radiometer could be used to help pilots avoid wires. Data are presented for seven sizes of wire as well as for the horizon background of each wire. The results show that wires down to 1/4 in. in diameter can probably be detected reliably at ranges up to 200 m with a 94-GHz radiometer that uses a 3-ft antenna, provided that the signature of the horizon background can be characterized during flight. Beyond 200 m, the results show that an image-enhancement algorithm, if proven to be adequate, or a larger antenna will probably be necessary to reliably detect most standard powerline wires.
General note	Title from title screen (viewed on Feb. 3, 2011).
General note	"February 2001."
Bibliography note	Includes bibliographical references (p. 11).
Access restriction	Approved for public release.
Report note	Final; 1 Jan to 31 Jan 2000.
Funding information	AMSRL-SE-RM PE: 62120A DA PR: A142
GPO item number	0324-A-01 (online)
Govt. docs number	D 101.133:837

Radiometric measurements of powerline cables at 94 GHz / David A. Wikner and Thomas J. Pizzillo.

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