The <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Signal_Corps_(United_States_Army)" id="mw0A" rel="mw:WikiLink" title="Signal Corps (United States Army)">United States Army Signal Corps</a> successfully conducts <a href="https://en.wikipedia.org/wiki/Project_Diana" id="mw0Q" rel="mw:WikiLink" title="Project Diana">Project Diana</a>, bouncing <a href="https://en.wikipedia.org/wiki/Radio_wave" id="mw0g" rel="mw:WikiLink" title="Radio wave">radio waves</a> off the Moon and receiving the reflected signals.<sup about="#mwt139" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-25"}}' id="cite_ref-25" rel="dc:references" typeof="mw:Extension/ref"><a href="./January_10#cite_note-25" id="mw0w" style="counter-reset: mw-Ref 25;"><span class="mw-reflink-text" id="mw1A">[25]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-25"><cite about="#mwt136" class="citation book cs1" id="CITEREFButrica1996">Butrica, Andrew J. (1996). <a class="external text" href="https://books.google.com/books?id=VUU7AQAAMAAJ" id="mwCE4" rel="mw:ExtLink nofollow"><i id="mwCE8">To See the Unseen: A History of Planetary Radar Astronomy</i></a>. Washington, D.C.: NASA. p.<span id="mwCFA" typeof="mw:Entity"> </span>9. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwCFE" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwCFI" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-0-7881-4005-1" id="mwCFM" rel="mw:WikiLink" title="Special:BookSources/978-0-7881-4005-1"><bdi id="mwCFQ">978-0-7881-4005-1</bdi></a>.</cite><span about="#mwt136" class="Z3988" id="mwCFU" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=To+See+the+Unseen%3A+A+History+of+Planetary+Radar+Astronomy&amp;rft.place=Washington%2C+D.C.&amp;rft.pages=9&amp;rft.pub=NASA&amp;rft.date=1996&amp;rft.isbn=978-0-7881-4005-1&amp;rft.aulast=Butrica&amp;rft.aufirst=Andrew+J.&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DVUU7AQAAMAAJ&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJanuary+10"></span></span>