Skip to main content

Project TouCans: Breaching the Bridge

The QSL cards for Project TouCans first POTA have gone out, so now I can talk about them online without any spoilers and—hopefully—a few clarifications and elucidations. First, this was Project TouCans first POTA, so it was kind of a big deal to the (12, 10, and 8 year-old)gang and I. It became even a bigger deal because TouCans managed to do—in a single outing, no less—something the Flying Rockmite hadn't been able to do in two different POTAs to the same site; namely, to breach the Golden Gate Bridge with a QSO! In our previous two attempts, all of our QSOs avoided the center span of the bridge leading us to hypothesize about the number of 20 meter wavelengths that might fit into the bridge span, the height of the bridge above the water and whatnot. Here's a look at the QSOS from our cliff-side perch during the Flying Rockmite outings.


And here's roughly the same view with Project TouCans!


Notice the green (I've added RST color coding to our mapping app since the first outings) QSO that breaches the bridge! This QSO led to much huzzahing and then a few unschooling projects.

First, we wanted a spiffy QSL card to commemorate the event. Diaze and 10 year-old Mota—aliases of course—collaborated and using Powerpoint came up with


I like to think that Edward Tufte would be proud, but who knows. While the gang and I have been messing with ham radio a lot over the last few months, I've kind of wandered away from posts addressing, "But how do you teach kids to ..... learn PowerPoint for example?" questions. Needless to say at this point, but "This is How." Diaze is into all things programming and art, Mota is inccreasingly into art and design for video game production, and voila.

Seeing the QSO meander over the bridge led me to thinking about what role the ionosphere might have had to play which led to a programming project for Diaze: retrieving data from our nearest ionosonde via the Python requests package. This led to a series of maps that I think Tufte would simply shake his head and walk away from—to be clear, this was my contribution—becasue they are very, very cluttered. But still, they're kind of fun, and they'll get better. In short, they show a model of a simple single skip from tx to rx for each QSO. Here's a video of one of them:



Comments

Popular posts from this blog

More Cowbell! Record Production using Google Forms and Charts

First, the what : This article shows how to embed a new Google Form into any web page. To demonstrate ths, a chart and form that allow blog readers to control the recording levels of each instrument in Blue Oyster Cult's "(Don't Fear) The Reaper" is used. HTML code from the Google version of the form included on this page is shown and the parts that need to be modified are highlighted. Next, the why : Google recently released an e-mail form feature that allows users of Google Documents to create an e-mail a form that automatically places each user's input into an associated spreadsheet. As it turns out, with a little bit of work, the forms that are created by Google Docs can be embedded into any web page. Now, The Goods: Click on the instrument you want turned up, click the submit button and then refresh the page. Through the magic of Google Forms as soon as you click on submit and refresh this web page, the data chart will update immediately. Turn up the:

Cool Math Tricks: Deriving the Divergence, (Del or Nabla) into New (Cylindrical) Coordinate Systems

Now available as a Kindle ebook for 99 cents ! Get a spiffy ebook, and fund more physics The following is a pretty lengthy procedure, but converting the divergence, (nabla, del) operator between coordinate systems comes up pretty often. While there are tables for converting between common coordinate systems , there seem to be fewer explanations of the procedure for deriving the conversion, so here goes! What do we actually want? To convert the Cartesian nabla to the nabla for another coordinate system, say… cylindrical coordinates. What we’ll need: 1. The Cartesian Nabla: 2. A set of equations relating the Cartesian coordinates to cylindrical coordinates: 3. A set of equations relating the Cartesian basis vectors to the basis vectors of the new coordinate system: How to do it: Use the chain rule for differentiation to convert the derivatives with respect to the Cartesian variables to derivatives with respect to the cylindrical variables. The chain

The Valentine's Day Magnetic Monopole

There's an assymetry to the form of the two Maxwell's equations shown in picture 1.  While the divergence of the electric field is proportional to the electric charge density at a given point, the divergence of the magnetic field is equal to zero.  This is typically explained in the following way.  While we know that electrons, the fundamental electric charge carriers exist, evidence seems to indicate that magnetic monopoles, the particles that would carry magnetic 'charge', either don't exist, or, the energies required to create them are so high that they are exceedingly rare.  That doesn't stop us from looking for them though! Keeping with the theme of Fairbank[1] and his academic progeny over the semester break, today's post is about the discovery of a magnetic monopole candidate event by one of the Fairbank's graduate students, Blas Cabrera[2].  Cabrera was utilizing a loop type of magnetic monopole detector.  Its operation is in concept very sim