Basic radio monitoring related information

HF Asia by Robert Fei

IRC #wunclub - Real time HF-monitoring via IRC- chat on "starchat.net". You'll find a large group of HF-enthusiasts
on this channel (including me) from all over the world - A list of Starchat IRC-servers can be found here

KB9UKD's Digital Modes Samples (interesting selection of recording showing mostly V/UHF digital modes)

Radioscanner.ru (interesting site with tons of radio related information - mostly in Russian language, nonetheless very interesting!)

UDXF website (UTILITY DXers FORUM)

"Utility Monitoring Central" by Mike Chace (nice compilation showing a wide variety of Utility related information)

Geographical information (very useful sites when looking up geographic placenames and their coordinates)

Global Gazetteer Version 2.1

Multimap.com - Online Maps to everywhere

Traveljournals.net

Geomagnetic and ionospheric data (useful sites with near realtime ionospheric data)

IPS Radio and Space Services

NR0D's Space Weather Page (excellent page showing the most inportant ionospheric parameters at a glance)

NWRA Space Weather Services

Military aviation related information

Aeroflight (excellent profiles on various Air Forces and general info on aircraft types)

Scramble Magazine (Great site for looking up serial numbers!)

Naval information

Haze Gray & Underway (very useful site when looking for hull numbers of warships)

Weather related information

NOAA

NOAA National Environmental Satellite, Data, and Information Service

Wetterzentrale (thunderstorm activity over EUR & North Africa, latest Meteosat satellite image for EUR & NAFR)
 

Manufacturers of professional HF equipment (transceivers, antennas, HF-modems & crypto units)

ASELSAN

Barrett Communications

Codan Ltd.

Crypto AG

Datron World Communications, Inc.

HAL Communications Corp.

Harris RF Communications Home Page

Mobat USA

Q-MAC Electronics

Radiant Antennas

Rapid Mobile (Pty) Ltd

Rockwell Collins, Inc.

Rohde & Schwarz GmbH

SCS (the creators of Pactor)

Selenia Komünikasyon A.S

Sunair Electronics Inc

Tadiran Communications Ltd.

Telefunken Racoms

TECOSA

Thales

Manufacturers and/or resellers of decoders and frequency databases/compilations

Hoka Electronics Italy

Hoka Electronic Netherlands

Ingenieurbüro für Satellitentechnik

Klingenfuss Publications

General Dynamics Advanced Information Systems

Shoc Inc.

Wavecom Elektronik AG

Monitoring Services

African Signal Index (interesting new subscription service focusing on non-broadcast signals from the African continent)

Reference sites

CryptoMuseum (very interesting site with loads of info on encryption devices, voice scramblers and professional radio equipment)
 

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