3 ms·
Well, that is kind of stale news. The sending of a few dots worked for a few weeks. I even participated. But a pack of angry hams sending dots was worse than th
by dbcurtis 7y ago
Well, that is kind of stale news. The sending of a few dots worked for a few weeks. I even participated. But a pack of angry hams sending dots was worse than the woodpecker. But anyway, after moving off the ham bands for a while, the woodpecker came back with a chirped signal. That was essentially unjammable.
Over-the-horizon HF radar needs to closely follow the MUF, staying just under it. So the woodpecker would drift up and down through the ham bands as the day want on.
- femto 7y agoI was working on the Jindalee OTHR at the time. We used to sit in the control room listening in on the Woodpecker. We also had quite a bit more power then the HAMs (beamformed) so they didn't ignore us. (Jindalee also stayed clear of the HAM bands. The radar had frequency exclusion tables built into it and there was a switch which allowed the tables to be overridden if necessary. A number of techs were HAMs and made sure the HAM bands were respected.)