<p>Radar signal echo from the moon. Oscilloscope photograph made at 11pm on January 22, 1946. Army Signal Corps photo.
</p><p>The American Annual of Photography
Volume 64
1950
</p>
Bought for one euro at the Rotterdam secondhand book market. It is on eBay for 44 dollars.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/56759497@N00">P K</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uair01/6789570806/">radar signal echo from the moon</a>