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Dean W. Armstrong Blog


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Science and other neato projects done, to do, or in the process of doing.
Visualizing A
2018-09-13 15:50
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 through Spectrum Laboratory and then tried out makin… Read More
2018-08-27 23:15
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 apparent. The colors represent different polarizatio… Read More
Freighter Visible On Weather Radar
2018-07-13 17:31
The Terminal Doppler Weather Radar system for Midway Airport caught the freighter Stewart J. Cort traveling on Lake Michigan towards Burns Harbor, IN. It's the return out in the middle of th… Read More
AM Broadcast Band, Day Vs. Night
2017-08-13 19:18
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 and/or change their antenna directionality at night… Read More
The Radio Satellite CUTE
2017-08-10 19:40
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 increases to the right in the image and frequency is… Read More
Revisiting The Lake Geneva SAR Image
2016-05-04 21:08
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 here's a much better grab of the HH channel Read More
SAR Image Of The Calumet Region Of Chicago
2016-05-02 17:08
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 April 10th, 2016, and have been taking a look at it. T… Read More
2016-03-19 18:53
Background: Hyde Park Residents Puzzled by Mysterious Noises, Vibrations, Loud Hum at Night. Some random thoughts: I hear a vague distant sound sometimes, like a locomotive engine that neve… Read More
2016-03-19 18:53
Oversharing: Yesterday's catalog search items that caught my eye. (My search was all T acquired in the past six months published in the past four years in English) The future of post-human… Read More

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