File:PAR Scope.jpg

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Description SRA James Calkins, an air traffic controller with the 1974th Communications Group of the Air Force Communications Command (AFCC), is reflected in the precision approach radar scope as he directs an aircraft.
Location: SCOTT AIR FORCE BASE, ILLINOIS (IL) UNITED STATES OF AMERICA (USA)
Date Taken on 1 November 1980
Source ID:DFST8203799
Author Service Depicted: Air Force
Permission
(Reusing this file)
Public domain
This image or file is a work of a U.S. Air Force Airman or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image or file is in the public domain in the United States.

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description

From: w:en:Radar_display#Beta_Scan_Scope

The specialist Beta Scan Scope was used for precision approach radar systems. It displays two lines on the same display, the upper one (typically) displaying the vertical approach (the glideslope), and the lower one the horizontal approach. A marker indicates the desired touchdown point on the runway, and often the lines are angled towards the middle of the screen to indicate this location. A single aircraft's "blip" is also displayed, superimposed over both lines, the signals being generated from separate antennas. Deviation from the centerline of the approach can be seen and easily relayed to the pilot.

In the image, the upper portion of the display shows the vertical situation, and the lower portion the horizontal. In the vertical, the two diagonal lines show the desired glideslope (upper) and minimum altitude approach (lower). The aircraft began its approach below the glideslope and captured it just before landing. The proper landing point is shown by the horizontal line at the left end. The lower display shows the aircraft starting to the left of the approach line and then being guided toward it.

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1 November 1980

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current00:03, 20 July 2006Thumbnail for version as of 00:03, 20 July 20061,900 × 2,800 (1.36 MB)Dual Freq{{Information |Source=[http://www.dodmedia.osd.mil/Assets/1982/Air_Force/DF-ST-82-03799.JPEG ID:DFST8203799] |Author=Service Depicted: Air Force |Description=SRA James Calkins, an air traffic controller with the 1974th Communications Group of the Air

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