Jump to content

File:Cape Cod Air Station - HAER MA-151-A - 384568pu.jpg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (5,052 × 4,089 pixels, file size: 10.22 MB, MIME type: image/jpeg)

Summary

Description
English: Closeup of the antenna elements of the US PAVE PAWS (Phased Array Warning System) ballistic missile defense radar located at Cape Cod Air Station, Technical Facility-Scanner Building & Power Plant, Massachusetts Military Reservation, Sandwich, Barnstable County, Massachusetts, USA. Constructed beginning in 1978, it was one of the first phased array radars. Each of the elements is a crossed dipole antenna. The drive current from the transmitter to each antenna passes through a phase shifter controlled by a computer system. The radio waves (microwaves) from each individual antenna combine in front of the antenna to create a narrow beam in a specific direction. By changing the phase shifts the computer can instantly steer the beam in any direction, scanning it across the sky to detect and track missiles. This large antenna produced a narrow "pencil" beam of microwaves only 2.2° wide
"Significance: The Technical Facility/Scanner Building and Power Plant is the central component of the PAVE PAWS complex and performs all the functions required for the missile detection and tracking mission, including detection, processing, and characterization." This image is part of the Historic American Building Survey (HABS), created by the Library of Congress, and hence is in the public domain. Survey number: HAER MA-151-A. Photographers: Bob Kramer (October 1999) and Neal Collett (January 10, 2000). See: https://www.loc.gov/pictures/item/ma1634/
Date
Source Daderot
Author Historic American Engineering Record (HAER), creator

Licensing

Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

4 February 2012

image/jpeg

ce38a134a8ae2b47e8de671570073976d7fc5054

10,721,046 byte

4,089 pixel

5,052 pixel

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current21:26, 4 February 2012Thumbnail for version as of 21:26, 4 February 20125,052 × 4,089 (10.22 MB)Daderot

The following 3 pages use this file:

Global file usage

The following other wikis use this file: