Definitions by IRISHREPUBLICANARMY

Automatic Secure Voice Communications Network 

A worldwide HF secure voice network developed to fulfill DOD long-haul, secure voice (radiotelephone requirements.

I have no idea why i put this in here

Automatic Secure Voice Communications Network by IrishRepublicanArmy January 24, 2004

SSB 

AM radio transmission in which only one sideband is transmitted.

SSB is a highly efficent modulation mode and is widely used for HF communications.

SSB by IrishRepublicanArmy January 24, 2004

gigaflop 

A billion, i.e. , 10(9), floating point operations per second.

Only supercomputers can run that fast..idiot

gigaflop by IrishRepublicanArmy January 24, 2004

worst hour of the year 

That hour of the year during which the median noise over any radio path is at a maximum.

Note: This hour is considered to coincide with the hour during which the greatest transmission loss occurs.

worst hour of the year by IrishRepublicanArmy January 24, 2004

GSM 

Global System for Mobile communications.

The most common digital cellular system in the world. GSM is used all over Europe, plus many countries in the Middle East, Asia, Africa, South America, Australia, and North America. GSM's air interface is based on narrowband TDMA technology, where available frequency bands are divided into time slots, with each user having access to one time slot at regular intervals. Narrow band TDMA allows eight simultaneous communications on a single radio multiplexor and is designed to support 16 half-rate channels. GSM also is the only technology that provides incoming and outgoing data services, such as email, fax, and internet surfing. GSM makes use of a SIM card that allows memory portability between dumb GSM phones.

The GSM system allowed for both internet surfing and digital voice communications over 1900 MHz radio networks.

GSM by IrishrepublicanArmy January 24, 2004

Type 4 Algorithm 

Unclassified cryptographic algorithm that has been registered by the National Institute of Standards and Technology, but is not a Federal Information Processing Standard. NTIA

I don't know who used the TYPE FOUR, in fact, I don't even have a HF receiver.

Type 4 Algorithm by IrishRepublicanArmy January 24, 2004

ATC 

Air Traffic Control

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ATC by iRiShREPUblicANarmY January 24, 2004