File:1913_Balloon_Borne_Pyrheliometer.jpg
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Summary
Description1913 Balloon Borne Pyrheliometer.jpg |
English: These are parts from balloon-borne pyrheliometer #2 designed by Charles Greeley Abbot and built by his craftsman Andrew Kramer at the original Smithsonian Astrophysical Observatory in about 1913. Following designs that had been developed for meteorographs, the recording medium was sensitized photographic paper on a slowly rotating drum. The drum was encased in a light-tight chamber save for an entrance slit parallel to the diameter. A thermometer filled the slight so that the mercury level would be recorded by the rotating paper as a function of time, and of altitude, as recorder by a barometric needle whose shadow was also superimposed. Other clockdriven elements periodically exposed the bulb of the thermometer to direct skylight and to ambient air temperature. This instrument stands as a milestone in sophistication and ingenuity in early self-registering automata. The balloon-sondes were lofted from Catalina Island off the coast of California and some reached 25 kilometers altitude. Data from these devices led to greatly refined values of Langley's solar constant, and helped to establish the modern range. A complete unit (#3) is preserved at the National Museum of American History. These parts were retrieved from the stores of the original SAO workshops, housed in the Garber facility, in the mid-1980s. Picture taken at the National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Virginia, USA. |
Date | |
Source | Own work |
Author | Sanjay Acharya |
Camera location | 38° 54′ 39.46″ N, 77° 26′ 39.65″ W | View this and other nearby images on: OpenStreetMap | 38.910961; -77.444347 |
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depicts
28 December 2017
38°54'39.460"N, 77°26'39.649"W
image/jpeg
4ee2263f49395bcc94f78d6e8a02325068ed6f6a
18,298,482 byte
3,648 pixel
5,026 pixel
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:34, 16 December 2018 | 5,026 × 3,648 (17.45 MB) | Sanjay ach | User created page with UploadWizard |
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Metadata
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Camera manufacturer | SONY |
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Camera model | DSC-RX10M4 |
Copyright holder |
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Exposure time | 1/15 sec (0.066666666666667) |
F-number | f/3.2 |
ISO speed rating | 800 |
Date and time of data generation | 14:38, 28 December 2017 |
Lens focal length | 15.17 mm |
Latitude | 38° 54′ 39.46″ N |
Longitude | 77° 26′ 39.65″ W |
City shown | Chantilly |
Horizontal resolution | 350 dpi |
Vertical resolution | 350 dpi |
Software used | DSC-RX10M4 v1.00 |
File change date and time | 14:38, 28 December 2017 |
Exposure Program | Normal program |
Exif version | 2.31 |
Date and time of digitizing | 14:38, 28 December 2017 |
Meaning of each component |
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Image compression mode | 5 |
APEX brightness | −0.00625 |
Exposure bias | 0 |
Maximum land aperture | 3.359375 APEX (f/3.2) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
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 | 41 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Lens used | Sony 24-600mm F2.4-4.0 |
Rating (out of 5) | 0 |
Code for country shown | USA |
IIM version | 2 |