File:NavigationResearch 021.jpg

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This photo was probably taken during an early radio direction finder experiment, probably in 1921. For more information, see NBS Scientific Paper 428 bu Frederick A. Kolster and Francis W. Dunmore, published January 16, 1922.

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National Institute of Standards and Technology

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National Institute of Standards and Technology

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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.

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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:32, 6 March 2014		5,194 × 4,276 (16.3 MB)	NISTResearchLibrary (talk \| contribs)

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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Image title	This photo was probably taken during an early radio direction finder experiment, probably in 1921. For more information, see NBS Scientific Paper 428 bu Frederick A. Kolster and Francis W. Dunmore, published January 16, 1922.
Author	National Institute of Standards and Technology
Copyright holder	The images in the Navigation Research Photographic Collection are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder. Use of the images from NIST Digital Collections is not restricted, but a statement of attribution is required. Please use the following attribution statement: "National Institute of Standards and Technology Digital Collections, Gaithersburg, MD 20899."
Headline	National Institute of Standards and Technology
Source	Navigation Research Photographic Collection
Short title	F. W. Dunmore testing an early type experimental radio direction finder developed at NBS
Width	5,194 px
Height	4,276 px
Bits per component	8 8 8
Compression scheme	Uncompressed
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	600 dpi
Vertical resolution	600 dpi
Data arrangement	chunky format
Software used	Adobe Photoshop CS6 (Windows)
File change date and time	14:01, 30 May 2013
Exif version	2.21
Color space	Uncalibrated
Date and time of digitizing	05:54, 24 April 2013
Date metadata was last modified	10:01, 30 May 2013
Original transmission location code	2730-1
Unique ID of original document	xmp.did:ECF7F49DE6ACE21194E5BA1E51D2A786
Keywords	United States. National Bureau of Standards--History--Photograph collections. Subject: Navigation--Research--Photograph collections. Subject: Navigation (Aeronautics)--Photograph collections. Subject: Radio beacons--Photograph collections. Subject: Radio compass--Photograph collections. Subject: Radio direction finders--Photograph collections. Subject: Instrument landing systems--Photograph collections. Subject: Runway localizing beacons--Photograph collections. Subject: Earth inductor compass--Photograph collections. Subject: Fog glidometer--Photograph collections.
Contact information	library@nist.gov 100 Bureau Dr, MS 2500 Gaithersburg, MD, 20899 301-975-3052
IIM version	4

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