RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel
RF & EE Symbols Word
RF Stencils for Visio

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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:
 AirplanesAndRockets.com

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes RF Cascade Workbook RF Stencils for Visio Shapes for Word Thank you for visiting RF Cafe!

Project West Ford: Earth's Saturn-Like Ring of Dipoles

Artist Ron Miller's rendition of a ringed Earth (Black Cat Studios) - RF CafeWhat do you think of the USAF's plan to deploy a band of millions of tiny dipole antennas into orbit around Earth for communications support? Because over-the-horizon (OTH) radio communications rely on the upper atmosphere being conductive to reflect radio waves, it is essential that there always be something for bending signals back to Earth rather than allowing them to escape into space. The ionosphere has many identified regions that do a good job of reflecting signals of certain wavelengths during particular times of day and under special atmospheric conditions cause by solar activity. There are times when reliable OTH communications are not possible because of severe coronal mass ejections (CMEs), high meteoric activity, and even terrestrial events like major volcanic eruptions. Even predictable variation in ionosphere characteristics like the diurnal blending of the F1 and F2 layers into a single F layer complicates emergency and strategic communications planning that is vital to national defense.

Project West Ford (aka Project Needles) Copper Wires (NASA photo) - RF CafeIn order to mitigate the risk, the U.S. Air Force decided to launch payloads consisting of millions - eventually even billions - of 3/4-inch-long wires would encircle the planet in a flat ring shape to act as half-wave reflector dipoles at 8 GHz. Project West Ford (aka Project Needles) was born. Astronomers opposed the project immediately because as envisioned the ring would interfere with both optical and radio observations. Their objections were duly noted and filed for later reference. To make a long story short, the first launch failed to properly deploy the wires, but the second was successful and served its intended purpose. While not technically in Low Earth Orbit (LEO) at 2,100 miles altitude, the wires' orbits did eventually degrade and the particles burned up in the atmosphere during reentry (nothing spectacular).

The copper wires were encased in a naphthalene gel that was supposed to evaporate in the vacuum of space, allowing the needles to disperse into a thin cloud (like Saturn's rings). Unfortunately, a chemical reaction between the naphthalene and copper metal-to-metal contact may have caused clumps of wires to form, thereby reducing the effective area of the reflective ring. In 2001, the European Space Agency (ESA) published a report titled  "Modeling of Copper Needle Clusters rom the West Ford Dipole Experiment" postulating the possibility that many are still orbiting the planet, and indeed, North American Aerospace Defense Command (NORAD) still tracks objects believed to be related to Project West Ford.

While Project West Ford did get off the ground literally, it never did figuratively. Some people believe the USAF cancelled the program because of the bad press it received worldwide. Headlines like "U.S.A. Dirties Space" in the USSR's newspaper Pravda, and a major story in the Harvard Crimson were common. Oh, this all happened in the early 1960s, when artificial communications satellites began populating our sky, so the metal wires were no longer deemed necessary. The rest, as it is said, is history.


What's old is new again, though. In 2002, at the beginning of the megabuck Global Warming (all hail) industry, a trio of scientists published a paper titled, "Earth Rings for Planetary Environment Control." In it they proposed deploying billions of tiny metallic reflectors into space to prevent the sun's rays from reaching Earth. A side benefit of facilitating global communications was mentioned (pages 8 and 13). Fortunately, we are still not blanketed by a layer of metal, but let the right politician get paid enough money and it will eventually get done.


Thanks to RF Cafe visitor Joe B. for sending me this link to "The Forgotten Cold War Plan That Put a Ring of Copper Around the Earth" on the Wired website. It is definitely worth reading.

"Project West Ford" by NASA

"Project Needles" aka "Project West Ford" history by NASA




Posted  August 17, 2013