File:330-PSA-118-61 (USN 710903) (21625532676).jpg
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Description330-PSA-118-61 (USN 710903) (21625532676).jpg | 330-PSA-118-61 (USN 710903): Navy Develops System for Tracking Homing Pigeons. A newly developed system which makes it possible for the first time to track a bird through its flight has provided the Navy with a unique research tool. In the first use of the system, a homing pigeon was tracked during a 20-mile flight to its home loft in the Philadelphia area on May 26, 1961. The objective of the study conducted by the Office of Naval Research is to learn how birds, together with aquatic and terrestrial animals, are able to navigate with a high degree of accuracy over long distances frequently in areas previously unknown to them. It is anticipated that this knowledge could lead to new concepts for the development of advanced miniaturized navigation and detection systems. The bird tracking system, developed for the biology branch of the Office of Naval Research by American Electronic Laboratories, Philadelphia, features a powerful miniaturized radio transmitter carried by the bird on its back. Weighing less than one ounce including power supply, the transmitter has an output of one thousandth of a watt (one milliwatt) of power. Supplied by three mercury button cells can operate the unit continuously for a least 20 hours. Attached to the transmitter package (partially shown) is a half wave dipole antenna that trails about 40 inches behind and below the bird. The first eight inches of the antenna is encased in a fiberglass rod to extend it behind the bird and prevent it from interfering with the bird’s tail feathers which provide control. Photograph released June 1, 1961. (9/22/2015). |
Date | |
Source | 330-PSA-118-61 (USN 710903) |
Author | National Museum of the U.S. Navy |
Licensing edit
This image was originally posted to Flickr by Photograph Curator at https://flickr.com/photos/127906254@N06/21625532676 (archive). It was reviewed on 10 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
10 July 2018
Public domainPublic domainfalsefalse |
This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:48, 10 July 2018 | 2,976 × 2,260 (10.04 MB) | Hiàn (alt) (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Metadata
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.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D80 |
Exposure time | 1/400 sec (0.0025) |
F-number | f/10 |
ISO speed rating | 2,000 |
Date and time of data generation | 10:23, 22 September 2015 |
Lens focal length | 22 mm |
Width | 3,872 px |
Height | 2,592 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS6 (Windows) |
File change date and time | 06:57, 23 September 2015 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 10:23, 22 September 2015 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 8.643856 |
APEX aperture | 6.643856 |
APEX exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 90 |
DateTimeOriginal subseconds | 90 |
DateTimeDigitized subseconds | 90 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 33 mm |
Scene capture type | Standard |
Scene control | High gain up |
Contrast | Hard |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 3073408 |
Lens used | 12.0-24.0 mm f/4.0 |
Date metadata was last modified | 02:57, 23 September 2015 |
Unique ID of original document | 3557683449DABE5A4E4C67AC4FF88E84 |