Dean W. Armstrong

As seen previously , a series of CFLs I used starting around 2008 onwards failed at varying lifetimes. I report a third failure, of a Nvisio...

A facebook link a friend shared mentioned a sound test and wondered if it was accurately matched to the listed frequency. I ran the sound t...

I downloaded the Sentinel-1 Synthetic Aperture Radar data of the Black Rock area taken on August 19, and the start of Burning Man work is ap...

The Terminal Doppler Weather Radar system for Midway Airport caught the freighter Stewart J. Cort traveling on Lake Michigan towards Burns ...

This is a comparison of the broadcast band during the day (at top) vs at night (bottom). Many stations are required to lower their power ...

The nanosat CUTE, or rather the CUTE-1.7 + APD II , sends out a beacon in morse code. I picked it up with a simple antenna and a SDR. Time i...

I realized my first processing of the Sentinel 1A radar image of Walworth County, WI , was deficient and I lost a lot of the details, so her...

I've been working on manipulating the large images offered by the Sentinel satellite. I found an image of the city of Chicago region on ...

I happened upon a nice description of how to grab data off of the ESA's Sentinel satellite via Evan Appelgate and there's a bunch o...

I picked this soldering iron out of the ewaste recycling stream that students dump at the end of the year, figuring I could use another iron...

Perhaps you've heard of constantly circling Cessna planes, spending hours circling high above US cities. http://www.washingtontimes.com...

19. After another of my famously lavish parties, I sometimes walk alone out to Promontory Point at exactly 10:00 p.m. Thursday and glance l...

A cute colorful insect hanging on out a clematis vine. Graphocephala coccinea, red-and-blue leafhopper.

Background: Hyde Park Residents Puzzled by Mysterious Noises, Vibrations , Loud Hum at Night . Some random thoughts: I hear a vague dista...

Oversharing: Yesterday's catalog search items that caught my eye. (My search was all T acquired in the past six months published in the ...