Questions tagged [itu-zones]

Questions related to how the ITU divided the Earth up into 90 zones and how to determine where you and/or your contact it located.

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11
votes
1answer
110 views

How do Radio Regulations and Frequency Allocations Apply to an Ionosonde?

An ionosonde is a special HF radio transmitter that periodically transmits a signal that sweeps across a large portion or the entire HF spectrum to identify the propagation of radio signal in the ...
10
votes
2answers
1k views

Where can I find the official definition of ITU Zones?

I've been looking around for a spot that has the official definition of what the various ITU Zones are, but can't find one. What is the official definition? I'm hoping for more than just a map, unless ...
6
votes
2answers
2k views

What are CQ/ITU zones used for?

There are already questions about the definition of CQ zones and ITU zones, but there is no information about what these zones are used for (and Google brings up various maps but no explanation). (Is ...