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 RF Cafe Forums 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 Bittele 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 RF Superstore 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!
TotalTemp Technologies (Thermal Platforms) - RF Cafe

Listening to Cosmic Messages - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2010 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

NOTICE: The original RF Cafe Forum is available again for reading, and the new RF Cafe Blog is an active board.

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

Jorrie
Post subject: Listening to Cosmic Messages
Posted: Sun Jul 09, 2006 2:58 pm
 
Lieutenant

Joined: Tue Jun 13, 2006 4:22 am

Posts: 1

Location: 25.9S 28.1E

The Mileura Widefield Array (MWA) is a triple purpose, low cost radio telescope with wide utility. The array comprises 500 “antenna-tiles”, each with 16 crossed dipoles, distributed over a region 1.5km across. The design trades complexity in hardware and software subsystems for massive computational power.

The MWA will be built at an extraordinarily radio-quiet site in Western Australia. The first phase is designed to operate in VHF band. It targets the study of 21 cm hydrogen emissions from the cosmological Epoch of Reionization (EOR), transient radio sources and space weather phenomena. The 21 cm EOR signals are redshifted by a factor of between 6 and 20 due to the expansion of the universe. It may shed light on how galaxies formed.

There is a short (4 page), but informative download on the MWA http://www.ursi.org/Proceedings/ProcGA05/pdf/. Look for J04.6(01286).pdf in the alpha-index. Background on cosmological expansion and redshift can be found at http://www.einsteins-theory-of-relativity-4engineers.com/cosmology.html.

Posted  11/12/2012
RIGOL Technologies (test equipment) - RF Cafe
KR Electronics (RF Filters) - RF Cafe
 Axiom Test Equipment - RF Cafe
Holzworth RF Synthesizers

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

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 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:

AirplanesAndRockets.com