Yet Another Unitarian Universalist
A postmodern heretic's spiritual journey.
We started Sunday school on August 20, a week earlier than usual, to correspond with the start of public school.
I leave for sabbatical on October 1, and have to have everything ship-shape and ready for the Sabbatical Religious Educator.
My other chorus started up, and the director is giving us some challenging music.
Our landlord decided to sell the house we’re living in (and thanks, Nancy, for finding a place for us to move to).
No wonder I feel busy.
The 6th annual Palo Alto All Day Sacred Harp Singing… singers came from all over California, and from Oregon, Louisiana, and Vermont. The temperature in the room went over 90 degrees, so we ended a half an hour early to make sure no one passed out. Here’s what we looked like in full cry, with fans going full blast:
Trebles (L-R, F-B): Rebecca, Inder, Arnold; Greg, Leah, Ruth; ???, Terry
Tenors (L-R, F-B): Steve, Mark, Yuka; Pat, Gerardo, Paul, Erica, Mary
Basses (L-R, F-B): Ed, Bob, Alex; Peter
Altos (L-R, F-B): Erika, Leigh; Janet, Marsha, Lena, Lorraine
(More than a dozen singers are not visible in this photo.)
1. HF wavelengths
“Although the ionospheric effects of solar eclipses have been studied for over 50 years, many unanswered questions remain,” according to HamSci.com, organizers of citizen science experiments designed to test the propagation of radio signals during the eclipse. I was not set up to actually participate in the citizen science experiments organized by HamSci.com, but I turned on one of my amateur radio transceivers to monitor high frequency transmissions during the eclipse; specifically, I monitored PSK-31 transmissions centered on 14.070 MHz, where I knew there would be a lot of activity.
Propagation was good before the eclipse started; at about 9 a.m. there was a fair amount of activity on 14.070 MHz, and I was receiving stations as far away as Colorado. As the eclipse progressed, I received fewer and fewer transmissions, and by about 10:20 (when the eclipse was at its maximum here in San Mateo), there were almost no readable transmissions. By now, the band is more active, although the stations I’m hearing are all on the West Coast.
My observations were completely unscientific, and it will be interesting to see what comes out of the data that the folks at HamSci.com are gathering during this eclipse.
2. Visible wavelengths
My plan was to project an image of the sun through binoculars mounted on a tripod. The sky was covered by stratus clouds (high fog) at 9 a.m., but by 9:45 the clouds began to break up and Carol and I got a few views of the moon’s shadow slowly moving over the sun’s disk. It became mostly clear by 10:20, in time for the maximum. Then it stayed clear, and I was able to watch the moon’s shadow slowly slide away from the sun.
One of the benefits of projecting the eclipse is that I could see the rotation of the earth as the projected image slowly moved as the sun changed its relative position in the sky. This was a good reminder that an eclipse involves relative movement of three astronomical bodies: sun, moon, and earth. And if I had had access to better optics, I could have projected a larger image and watched the movement of sunspots as well.
3. The emotional response
At about 10:20, when the eclipse was at its greatest extent, it was noticeably dimmer than it should have been. The light was about as bright as it would be around sunset — the difference being that the sun was high in the sky, so the shadows were short. It definitely felt a little eerie.
But mostly what I felt was a sense of wonder. This was the most astronomical fun I’ve had since watching the transit of Venus a few years ago.
You’ve seen those bumper stickers that some political progressives have, right? You know, there’s the word “Resist!” and under it or beside it the circuit diagram symbol for a resistor. (Though there’s a part of me that wants to know how many ohms of resistance I’m supposed to provide.) Now here’s a version of that meme aimed at geeks who are also politically progressive…
The middle two statements are nonsensical (is “capacitate” the opposite of “incapacitate”?). But the last statement is actually my preferred slogan for action in today’s political climate: I don’t want to resist, I want to transform (though let’s be clear that I do not mean this literally: I don’t want to transfer electrical energy through coupled inductors via a magnetic field, OK?).