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 Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine USAF Radr Shop Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Thank you for visiting RF Cafe!
everythingRF RF & Microwave Parts Database - RF Cafe
Berkeley Nucleonics Phase Noise Testing Seminar - RF Cafe
 

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

withwave microwave devices - RF Cafe

UFO Landing Site Markers?

The Center for Land Use Interpretation Bar Code Calibration - RF CafeThis evidently buzz-worthy item du jour hit the news wires in the last couple days. There are many people who's hobby is scanning every square inch of terra firma as imaged from space by Google Earth and Street View cameras. I could not find an official organization they can belong to, but most would not want to be identified anyway lest the black helicopters swoop in to snatch them in the middle of the night. Like the mysterious patterns that were spotted in the Gobi Desert last year, these black and white patterns show up at U.S. military installations and various other locations. Reportedly, they were constructed as long ago as the 1950s for calibrating cameras in high-altitude spy aircraft like the SR-71 Blackbird and the U-2 Dragon Lady (not Bono's group). The Center for Land Use Interpretation has a collection of aerial images of the bar codes and some from-the-ground images. For other interesting images, try the Google Earth Cool Places website, where people continuously upload new sightings.

UFO Landing Site Markers? - RF Cafe

Posted  February 2013

 

Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe
RF Cafe Sponsors
RF Superstore (RF Components) - RF Cafe
Amplifier Solutions Corporation (ASC) - RF Cafe

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

These Are Available for Free