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Showing posts with the label Bay

Propagation Experiments: Signal Strength vs. Tide Levels

 Sometimes you get an idea about two variables that might depend on each other, so you look to see if there's a correlation. That's science. What happens not as much is that if the variables don't correlate, or at least they don't seem to,  you should publish anyway. The lack of a relationship can in fact be new information. So, along those lines, here goes.  We activated US-0757 twice last week. In both cases, we deployed the TouCans vertical antenna on a pier with the ground wire submersed in the Bay waters below. In both cases, one of the Utah RBN stations that spotted us suddenly had very high signal levels with respect to our station on 20 meters. On the second day's activation I happened to notice that the water seemed closer to the pier when the signal dBs went up than it had been at the start of the activation. As it turned out, I was correct about the water level so I graphed tide levels vs. TouCan's signal into Utah. It turned out there wasn't an o...

Unschooling Swimming and the San Francisco Bay

 Daize, the 11 year-old, swam from the beach to the end of a pier in the San Francisco Bay today! She can now officially swim in the ocean, and since she was not the one kid that got to take swimming lessons pre-pandemic, that also means that she can officially swim at all! The whole swimming thing has been a very incremental, very unschooling sort of process. Before the pandemic struck, we were able to cycle one kid through swimming class, the now nine year-old Mota. Meanwhile, because of the one adult per kid requirement, the other two kids, Daize and Tawnse, had to wait—and then pandemic. And that meant, thanks to my lungs, we quit going inside swimming pools. But, all was not lost. Now imagine you're a kid whose dad developed pulmonary embolisms after catching something that looked a lot like SARS-CoV1, then, years later, lost two feet of his intestine because clotting; who also has a grandmother and aunt who had/have Type 1 diabetes. https://t.co/gUoSOqcJ6A — antigrav_kids (@...