High-frequency direction finding:
A type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can effectively communicate over long distances; for example, between U-boats and their land-based headquarters.
HF/DF or nickname huff-duff.
Since 1915, Robert Watson-Watt had been working for the Met Office in a lab that was colocated at the National Physical Laboratory's (NPL) Radio Research Section (RRS) at Ditton Park in Slough.
When he was reportedly pulled over by a traffic policeman with a speed detecting radar gun, Robert Watson-Watt is reported to have said: 'Had I known what you were going to do with it I would have never have invented it!'.
A colocation of radio and weather.
Lecture on the Weather by John Cage was broadcast on the radio as part of the series, Music of Today, on July 4, 1976. It included twelve narrators reading from the works by Henry David Thoreau. The order and sections were derived using chance procedures. Cage collaborated with the artist, Maryanne Amacher to provide recordings of sounds of nature, specifically from Walden Pond: first, rain and birds, then wind, and finally thunder. In his preface to the work Cage quotes, Martin Luther King Jr, who made reference to Thoreau in a civil rights speech, “What we were preparing to do in Montgomery was related to what Thoreau had expressed. We were saying to the white community, ‘We can no longer lend our cooperation to an evil system.’”
A Writer's Diary. May 25th 2020.
This evening's concert will begin with a call for Cage’s 4, 33 to be re-recorded as 9, 29 in memory of George Floyd.
And follow with Scores for Insects.