F region

That portion of the ionosphere existing between approximately 160 and 400 km above the surface of the Earth, consisting of layers of increased free-electron density caused by the ionizing effect of solar radiation. Note 1: The F region reflects normal-incident frequencies at or below the critical frequency (approximately 10 MHz) and partially absorbs waves of higher frequency. Note 2: The F1 layer exists from about 160 to 250 km above the surface of the Earth and only during daylight hours. Though fairly regular in its characteristics, it is not observable everywhere or on all days. The principal reflecting layer during the summer for paths of 2,000 to 3,500 km is the F1 layer. The F1 layer has approxi­mately 5 ´ 105 e/cm3 (free electrons per cubic centi­meter) at noontime and minimum sunspot activity, and increases to roughly 2 ´ 106 e/cm3 during maxi­mum sunspot activity. The density falls off to below 104 e/cm3 at night. Note 3: The F1 layer merges into the F2 layer at night. Note 4: The F2 layer exists from about 250 to 400 km above the surface of the Earth. The F2 layer is the principal reflecting layer for HF communications during both day and night. The horizon-limited distance for one-hop F2 propagation is usually around 4,000 km. The F2 layer has about 106 e/cm3. However, variations are usually large, ir­reg­ular, and particularly pronounced during magnetic storms.

good thing there are like 10 people in the world who know what that means

by IRISHrepublicanARMY January 03, 2004

CB Radio

Citizen's Band radio service:

radio frequency range, worldwide service:
26.965 to 27.405 MHz

still used all across the USA by truckers for the avoidance of police officers cops and in the rest of the world by terrorists and FARC

Channel 9- international emergency channel

Channel 19-international calling/trucker channel

"Breaker Breaker one-niner, this is Wohn Jayne, we got smokey on your tail and a beaver in a flop top at your 1 o'clock"

by IrishRepublicanArmy October 28, 2003

N451

1337 speak for NAZI

OMG WTF T34|\/| N451 H4X 2 D4 M4X111!!!111!!



(example is written in all caps)

by IrishRepublicanArmy June 05, 2004

urbanaddict

one who is addicted to adding definitions to www.urbandictionary.com

Hi, my name is (insert name here) and i am an urbanaddict

by IrishRepublicanArmy December 20, 2003

singles awareness day

Feb. 13th, the day before Valentine's Day. Because so many people don't have relationships (or do, and they hate Valentine's Day anyway), Feb 13th is the day where single people do nothing, there are no cards, no flowers or anything like that.

Happy singles awareness day!

by IrishRepublicanArmy February 14, 2004

facsimile

The transferring of images, usually or hard-copy documents, via telephone lines to another device that can recieve and interpret the images.

I am the only person that knows how to spell that word.

by IrishRepublicanArmy December 29, 2003

Mayday

international distress radio code word, when using voice transmission

SOS is the morse code version

MAYDAY is reconized internationally as an emergency code on any type of radio system, and should be taken seriously.

"Coast Guard, this is the Andrea Gail, MAYDAY MAYDAY MAYDAY"

by IrishRepublicanArmy October 28, 2003