Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
RF Cascade Workbook 2018 - RF Cafe

Diana Moon Radar
September 1958 Radio & TV News

September 1958 Radio & TV News
September 1958 Radio & TV News Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919-1959. All copyrights hereby acknowledged.

Earth-Moon-Earth (EME) communications have been used by amateur radio operators for a few decades now, made possible by more capable transmitters and receivers as well as digital encoding which facilitates operation closer to the noise floor. EME is regarded largely as a novelty branch of Ham radio since relatively few people are set up to exploit it. In 1946, the U.S. Army Signal Corps created "Project Diana," named for the Roman moon goddess Diana, as an experimental exercise to bounce radar signals off the Moon and receive the reflected signals. It was the first attempt at radar astronomy and was the first time a terrestrial radio signal was bounced off another celestial body. Once artificial satellites were orbiting in the late 1950's, Hams and other entities were encouraged to detect and track orbits and signal transmission properties - including frequency and power - to aid government engineers and scientists in determining stability (electrical and mechanical), speed, rotation, altitude, path, atmospheric and cosmological noise sources, and other parameters. In order to reward Hams for their efforts, QSL cards were issued to anyone who took the trouble to report reception incidences. The first QSL cards issued for satellite reception reports was by the Russians during the Sputnik flights in 1957.

Diana Moon Radar

Diana Moon Radar, September 1958 Radio & TV News - RF CafeAmateur radio operators who successfully pick up signals from outer space during calibration of the satellite-Minitrack stations can now show cards acknowledging their reception. Before launching of U. S. satellites, the giant transmitter and antenna of the Diana moon radar at the U.S. Army Signal Research and Development Laboratory at Fort Monmouth bounce 108-mc. signals off the moon. This is done so that the far-flung Minitrack stations and amateur radio operators can calibrate their receivers for precise tuning to the transmitters aboard the U.S. satellites. When hams receive the moon-bounced signals, they notify the Laboratory at Fort Monmouth or the American Radio Relay League at West Hartford, Connecticut. In appreciation of their assistance, the Army sends each reporting amateur a customary acknowledgement or QSL card - the first one ever issued for picking up signals via the moon.



Posted August 18, 2020

KR Electronics (RF Filters) - RF Cafe
Axiom Test Equipment - RF Cafe
Innovative Power Products Passive RF Products - RF Cafe
Exodus Advanced Communications Best in Class RF Amplifier SSPAs
everythingRF RF & Microwave Parts Database - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free


About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: