[A-DX] SWRG#119, preview 1st story ===> 23.30-24.00z via 9265 kHz WINB

Do Sep 26 22:36:17 CEST 2019

Welcome to program 119 of Shortwave Radiogram

I'm Kim Andrew Elliott in Arlington, Virginina USA

Here is the lineup for today's program, in MFSK modes as noted:

  1:37  MFSK32: Program preview (now)
  2:41  Festival of Frequency Measurement honors WWV centennial*
  6:48  MFSK64: MIT engineers produce blackest material*
11:47  This week's images*
27:09  MFSK32: Closing announcements*

* with image

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Twitter: @SWRadiogram

 From ARRL:

Festival of Frequency Measurement Set to Honor WWV Centennial

18 September 2019

HamSCI and the Case Amateur Radio Club of Case Western Reserve
University (W8EDU) will sponsor a "Festival of Frequency
Measurement" on WWV's centennial, October 1, from 0000 to 2359
UTC (starting on Monday evening, September 30, in the Americas).
The event invites radio amateurs, short-wave listeners, and
others capable of making high-quality frequency measurements on
HF to participate and publish their data to the HamSCI community
on the Zenodo open-data sharing site.

"Changes in ionospheric electron density caused by space weather
and diurnal solar changes are known to cause Doppler shifts on HF
ray paths," the event announcement says. "HamSCI's first attempt
at a measurement of these Doppler shifts was during the August
2017 total solar eclipse. We plan a careful measurement during
the 2024 eclipse."

Some of the questions the research event is hoping to answer
include how WWV's 5 MHz propagation path varies over a given
calendar day, and how various measurement techniques for
understanding the path variations compare. The objectives are to
measure Doppler shifts caused by the effect of space weather on
the ionosphere, and to use a specified measurement protocol
available to Amateur Radio operators and other
citizen-scientists. The experiment will use August 1, 2019 (UTC)
as a control date.

"The recordings in this experiment are expected to show
formations of the D-layer at stations' local sunrise and other
daily events of the ionosphere," the announcement said. "Space
weather varies day to day and some features may be prominent.
We'll see what we get!"


Full information is on the Festival of Frequency Measurement

Das entsprechende MFSK32-Bild:

Dopplereffekte bei Backscatter (3 Beispiele von vielen Collagen)