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- Project_Diana abstract "Project Diana, named for the Roman moon goddess Diana, was an experimental project of the US Army Signal Corps in 1946 to bounce radar signals off the Moon and receive the reflected signals. This was the first experiment in radar astronomy and the first active attempt to probe another celestial body. It was the inspiration for later EME (Earth-Moon-Earth) communication techniques.At a laboratory at Camp Evans (part of Fort Monmouth), in Wall Township, New Jersey, a large transmitter, receiver and antenna array were constructed for this purpose. The transmitter, a highly modified SCR-271 radar set from World War II, provided 3 kilowatts (later upgraded to 50 kilowatts) at 111.5 MHz in 1⁄4-second pulses, applied to the antenna, a \"bedspring\" reflective array antenna composed of an 8x8 array of half wave dipoles in front of a reflector which provided 24 dB of gain. Reflected signals were received about 2.5 seconds later, the time required for the radio waves to make the 768,000-kilometre (477,000 mi) round-trip journey from the Earth to the Moon and back. The receiver had to compensate for the Doppler shift in frequency of the reflected signal due to the Moon's orbital motion relative to the Earth's surface, which was different each day, so this motion had to be carefully calculated for each trial. The antenna could be rotated in azimuth only, so the attempt could be made only as the moon passed through the 15 degree wide beam at moonrise and moonset, as the antenna's elevation angle was horizontal. About 40 minutes of observation was available on each pass as the Moon transited the various lobes of the antenna pattern.The first successful echo detection came on 10 January 1946 at 11:58am local time by John H. DeWitt and his chief scientist E. King Stodola.Project Diana marked the birth of radar astronomy later used to map Venus and other nearby planets, and was a necessary precursor to the US space program. It was the first demonstration that terrestrial radio signals could penetrate the ionosphere, opening the possibility of radio communications beyond the earth for space probes and human explorers. It also established the practice of naming space projects after Roman gods, e.g., Mercury and Apollo.Today, the Project Diana site is part of the Information Age Science History Museum and Learning Center and is maintained by the Ocean-Monmouth Amateur Radio Club.".
- Project_Diana thumbnail Project_Diana_antenna.jpg?width=300.
- Project_Diana wikiPageExternalLink ch1.htm.
- Project_Diana wikiPageExternalLink Project_Diana.
- Project_Diana wikiPageExternalLink diamof.html.
- Project_Diana wikiPageID "6802305".
- Project_Diana wikiPageLength "6511".
- Project_Diana wikiPageOutDegree "49".
- Project_Diana wikiPageRevisionID "699239318".
- Project_Diana wikiPageWikiLink Amateur_radio.
- Project_Diana wikiPageWikiLink Antenna_array.
- Project_Diana wikiPageWikiLink Apollo.
- Project_Diana wikiPageWikiLink Astronomical_object.
- Project_Diana wikiPageWikiLink Azimuth.
- Project_Diana wikiPageWikiLink Camp_Evans_Historic_District.
- Project_Diana wikiPageWikiLink Category:1946_in_science.
- Project_Diana wikiPageWikiLink Category:1946_in_the_United_States.
- Project_Diana wikiPageWikiLink Category:Monmouth_County,_New_Jersey.
- Project_Diana wikiPageWikiLink Category:Radio_technology.
- Project_Diana wikiPageWikiLink Category:United_States_Army_projects.
- Project_Diana wikiPageWikiLink Communication_Moon_Relay.
- Project_Diana wikiPageWikiLink Communications_satellite.
- Project_Diana wikiPageWikiLink Decibel.
- Project_Diana wikiPageWikiLink Diana_(mythology).
- Project_Diana wikiPageWikiLink Dipole_antenna.
- Project_Diana wikiPageWikiLink Doppler_effect.
- Project_Diana wikiPageWikiLink Earth–Moon–Earth_communication.
- Project_Diana wikiPageWikiLink Edwin_King_Stodola.
- Project_Diana wikiPageWikiLink Elevation.
- Project_Diana wikiPageWikiLink Fort_Monmouth.
- Project_Diana wikiPageWikiLink Hertz.
- Project_Diana wikiPageWikiLink Ionosphere.
- Project_Diana wikiPageWikiLink John_H._DeWitt,_Jr..
- Project_Diana wikiPageWikiLink List_of_lunar_deities.
- Project_Diana wikiPageWikiLink Mercury_(mythology).
- Project_Diana wikiPageWikiLink Military_intelligence.
- Project_Diana wikiPageWikiLink Moon.
- Project_Diana wikiPageWikiLink NASA.
- Project_Diana wikiPageWikiLink Parabolic_antenna.
- Project_Diana wikiPageWikiLink Radar.
- Project_Diana wikiPageWikiLink Radar_astronomy.
- Project_Diana wikiPageWikiLink Radiation_pattern.
- Project_Diana wikiPageWikiLink Radio_receiver.
- Project_Diana wikiPageWikiLink Reflective_array_antenna.
- Project_Diana wikiPageWikiLink Roman_mythology.
- Project_Diana wikiPageWikiLink Signal_Corps_(United_States_Army).
- Project_Diana wikiPageWikiLink Space_probe.
- Project_Diana wikiPageWikiLink Transmitter.
- Project_Diana wikiPageWikiLink Wall_Township,_New_Jersey.
- Project_Diana wikiPageWikiLink Watt.
- Project_Diana wikiPageWikiLink World_War_II.
- Project_Diana wikiPageWikiLink File:Diana_QSL.jpg.
- Project_Diana wikiPageWikiLink File:First_radar_return_from_the_Moon_-_Project_Diana_1946.jpg.
- Project_Diana wikiPageWikiLink File:Project_Diana_antenna.jpg.
- Project_Diana wikiPageWikiLinkText "Project Diana".
- Project_Diana wikiPageUsesTemplate Template:Convert.
- Project_Diana wikiPageUsesTemplate Template:Frac.
- Project_Diana wikiPageUsesTemplate Template:Refimprove.
- Project_Diana subject Category:1946_in_science.
- Project_Diana subject Category:1946_in_the_United_States.
- Project_Diana subject Category:Monmouth_County,_New_Jersey.
- Project_Diana subject Category:Radio_technology.
- Project_Diana subject Category:United_States_Army_projects.
- Project_Diana hypernym Project.
- Project_Diana type Band.
- Project_Diana comment "Project Diana, named for the Roman moon goddess Diana, was an experimental project of the US Army Signal Corps in 1946 to bounce radar signals off the Moon and receive the reflected signals. This was the first experiment in radar astronomy and the first active attempt to probe another celestial body.".
- Project_Diana label "Project Diana".
- Project_Diana sameAs Q7249063.
- Project_Diana sameAs Proyecto_Diana.
- Project_Diana sameAs Projekt_Diana.
- Project_Diana sameAs m.0gpp6z.
- Project_Diana sameAs Q7249063.
- Project_Diana wasDerivedFrom Project_Diana?oldid=699239318.
- Project_Diana depiction Project_Diana_antenna.jpg.
- Project_Diana isPrimaryTopicOf Project_Diana.