Chain_Home_screen_shot_-NEDAD.2013.047.058A.jpg
Size of this preview:
799 × 599 pixels
.
Other resolutions:
320 × 240 pixels
|
640 × 480 pixels
|
1,024 × 768 pixels
|
1,280 × 960 pixels
|
2,560 × 1,921 pixels
|
7,031 × 5,275 pixels
.
Summary
Description Chain Home screen shot -NEDAD.2013.047.058A.jpg |
English:
A screen-shot of a late model Chain Home radar display (likely from a video). The image shows the actual radar return as the bumpy trace just below the MILES scale at the top. The large spike just visible on the extreme left is the return caused by leftover signal from the transmitter. Returns from targets closer than this distance, about 5 miles, were invisible. Three "blips" are visible to the right of this, one large one at about 18 miles, another at about 25 miles, and a third at about 30 miles. The pointer on the miles scale was moved by the operator to overlay a selected blip, in this case the most distance one. By pressing a button, the current setting of that marker and the goniometer that measured the angle of the return were both sent electrically to the "fruit machine", an analog computer. The fruit machine then applied corrections to the angle for known oddities of the receiver, then used the corrected angle and reported range the produce X and Y locations. These were plotted on paper maps, and then forwarded up the chain of command.
Image is RAF Air Defence Radar Museum's catalog number NEDAD.2013.047.058A.
|
||
Date | |||
Source | Chris Morshead, email | ||
Author | RAF Air Defence Radar Museum | ||
Permission
( Reusing this file ) |
|
Licensing
This file is licensed under the
Creative Commons
Attribution-Share Alike 3.0 Unported
license.
Attribution:
Radar Museum, NEDAD.2013.047.058A
-
You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
-
Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.