File:IEEE MILESTONE Demonstration of a Radar Predecessor, 1904.jpg
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Summary
DescriptionIEEE MILESTONE Demonstration of a Radar Predecessor, 1904.jpg |
IEEE MILESTONE Demonstration of a Radar Predecessor, 1904 On 17 May 1904, near this site, Christian Hülsmeyer demonstrated his Telemobiloskop: a spark gap transmitter, simple parabolic antennas, detector, and an indicator. It was designed to ring a bell when a barge passed the system at a range of several hundred meters. He patented this device in Germany, the United Kingdom, and the U.S.A. This was the world's first operable device to detect radio reflections, a predecessor of radar. Octobre 2019 IEEE (Institute of Electrical and Electronics Engineers) |
Date | |
Source | Own work |
Author | Andreas Schwarzkopf |
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Camera location | 50° 56′ 25.82″ N, 6° 57′ 46.01″ E ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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50°56'25.822"N, 6°57'46.012"E
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:45, 20 September 2021 | ![]() | 3,720 × 2,556 (3.54 MB) | Andreas Schwarzkopf | VicuñaUploader 1.23 |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A650 IS |
Exposure time | 1/100 sec (0.01) |
F-number | f/3.2 |
ISO speed rating | 800 |
Date and time of data generation | 16:24, 18 September 2021 |
Lens focal length | 14.783 mm |
Latitude | 50° 56′ 25.82″ N |
Longitude | 6° 57′ 46.01″ E |
Author | Andreas Schwarzkopf |
Image title |
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City shown | Köln |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop 7.0 |
File change date and time | 17:29, 20 September 2021 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 16:24, 18 September 2021 |
Meaning of each component |
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Image compression mode | 5 |
Shutter speed | 6.65625 |
APEX aperture | 3.34375 |
Exposure bias | 0 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 13,745.704467354 |
Focal plane Y resolution | 13,698.630136986 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
GPS time (atomic clock) | 14:24 |
Geodetic survey data used | WGS-84 |
GPS date | 18 September 2021 |
GPS tag version | 0.0.2.2 |
Supported Flashpix version | 1 |
Image width | 4,000 px |
Image height | 3,000 px |
Compression scheme | JPEG (old) |
Keywords |
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Code for country shown | DEU |
Sublocation of city shown | Altstadt-Nord |
Country shown | Deutschland |
Province or state shown | Nordrhein-Westfalen |
IIM version | 2 |