RSID: <<2023-01-20T00:31Z MFSK-32 @ 9265000+1500>>

Welcome to program 288 of Shortwave Radiogram.

I'm Kim Andrew Elliott in Arlington, Virginia USA.

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

  1:40 MFSK32: Program preview (now)
  2:48 MFSK32: NASA's Geotail mission ends after 30 years*
  9:27 MFSK64: Spray coating blocks RF with flip of a switch
13:33 MFSK64: This week's images*
28:06 MFSK32: Closing announcements

* with image(s)


 

Please send reception reports to radiogram@verizon.net

And visit http://swradiogram.net

We're on Twitter now: @SWRadiogram

NASA's Geotail mission operations come to an end after 30 years

by Mara Johnson-Groh, NASA's Goddard Space Flight Center
January 18, 2023

After 30 years in orbit, mission operations for the joint
NASA-JAXA Geotail spacecraft have ended, after the failure of the
spacecraft's remaining data recorder.

After its launch on July 24, 1992, Geotail orbited Earth,
gathering an immense dataset on the structure and dynamics of the
magnetosphere, Earth's protective magnetic bubble. Geotail was
originally slated for a four-year run, but the mission was
extended several times due to its high-quality data return, which
contributed to over a thousand scientific publications.

While one of Geotail's two data recorders failed in 2012, the
second continued to work until experiencing an anomaly on June
28, 2022. After attempts to remotely repair the recorder failed,
the mission operations were ended on November 28, 2022.

"Geotail has been a very productive satellite, and it was the
first joint NASA-JAXA mission," said Don Fairfield, emeritus
space scientist at NASA's Goddard Space Flight Center in
Greenbelt, Maryland, and NASA's first project scientist for
Geotail until his retirement in 2008. "The mission made important
contributions to our understanding of how the solar wind
interacts with Earth's magnetic field to produce magnetic storms
and auroras."

With an elongated orbit, Geotail sailed through the invisible
boundaries of the magnetosphere, gathering data on the physical
process at play there to help understand how the flow of energy
and particles from the sun reach Earth. Geotail made many
scientific breakthroughs, including helping scientists understand
how quickly material from the sun passes into the magnetosphere,
the physical processes at play at the magnetosphere's boundary,
and identifying oxygen, silicon, sodium, and aluminum in the
lunar atmosphere.

The mission also helped identify the location of a process called
magnetic reconnection, which is a major conveyor of material and
energy from the sun into the magnetosphere and one of the
instigators of the aurora. This discovery laid the way for the
Magnetospheric Multiscale mission (MMS), which launched in 2015.

Over the years, Geotail collaborated with many of NASA's other
space missions including MMS, Van Allen Probes, Time History of
Events and Macroscale Interactions during Substorms mission,
Cluster, and Wind. With an orbit that took it as far as 120,000
miles from Earth at times, Geotail helped provide complementary
data from remote parts of the magnetosphere to give scientists a
complete picture of how events seen in one area affect other
regions. Geotail also paired with observations on the ground to
confirm the location and mechanisms of how aurora form.

Although Geotail is done gathering new data, the scientific
discoveries aren't over. Scientists will continue to study
Geotail's data in the coming years.

https://phys.org/news/2023-01-nasa-geotail-mission-years.html

 

Image: An artist's concept of the Geotail spacecraft ...

Sending Pic:194x163C;








Shortwave Radiogram now changes to MFSK64 ...

 

RSID: <<2023-01-20T00:39Z MFSK-64 @ 9265000+1500>>

This is Shortwave Radiogram in MFSK64

Please send your reception report to radiogram@verizon.net
 

From Phys.org:

Blocking radio waves and electromagnetic interference with the
flip of a switch

by Drexel University

Researchers in Drexel University's College of Engineering have
developed a thin film device, fabricated by spray coating, that
can block electromagnetic radiation with the flip of a switch.
The breakthrough, enabled by versatile two-dimensional materials
called MXenes, could adjust the performance of electronic
devices, strengthen wireless connections and secure mobile
communications against intrusion.

The team, led by Yury Gogotsi, Ph.D., Distinguished University
and Bach professor in Drexel's College of Engineering, previously
demonstrated that the two-dimensional layered MXene materials,
discovered just over a decade ago, when combined with an
electrolyte solution, can be turned into a potent active shield
against electromagnetic waves.

This latest MXene discovery, reported in Nature Nanotechnology,
shows how this shielding can be tuned when a small voltage - less
than that produced by an alkaline battery - is applied.

"Dynamic control of electromagnetic wave jamming has been a
significant technological challenge for protecting electronic
devices working at gigahertz frequencies and a variety of other
communications technologies," Gogotsi said.

"As the number of wireless devices being used in industrial and
private sectors has increased by orders of magnitude over the
past decade, the urgency of this challenge has grown accordingly.
This is why our discovery - which would dynamically mitigate the
effect of electromagnetic interference on these devices - could
have a broad impact."

MXene is a unique material in that it is highly conductive - making
it perfectly suited for reflecting microwave radiation that could
cause static, feedback or diminish the performance of
communications devices - but its internal chemical structure can
also be temporarily altered to allow these electromagnetic waves
to pass through.

This means that a thin coating on a device or electrical
components prevents them from both emitting electromagnetic
waves, as well as being penetrated by those emitted by other
electronics. Eliminating the possibility of interference from
both internal and external sources can ensure the performance of
the device, but some waves must be allowed to exit and enter when
it is being used for communication.

"Without being able to control the ebb and flow of
electromagnetic waves within and around a device, it's a bit like
a leaky faucet - you're not really turning off the water and that
constant dripping is no good," Gogotsi said. "Our shielding
ensures the plumbing is tight - so-to-speak - no electromagnetic
radiation is leaking out or getting in until we want to use the
device."

The key to eliciting bidirectional tunability of MXene's
shielding property is using the flow and expulsion of ions to
alternately expand and compress the space between material's
layers, like an accordion, as well as to change the surface
chemistry of MXenes.

With a small voltage applied to the film, ions enter - or
intercalate - between the MXene layers altering the charge of their
surface and inducing electrostatic attraction, which serves to
change the layer spacing, the conductivity and shielding
efficiency of the material. When the ions are deintercalated, as
the current is switched off, the MXene layers return to their
original state.

The team tested 10 different MXene-electrolyte combinations,
applying each via paint sprayer in a layer about 30 to 100 times
thinner than a human hair. The materials consistently
demonstrated the dynamic tunability of shielding efficiency in
blocking microwave radiation, which is impossible for traditional
metals like copper and steel. And the device sustained the
performance through more than 500 charge-discharge cycles.

"These results indicate that the MXene films can convert from
electromagnetic interference shielding to quasi-electromagnetic
wave transmission by electrochemical oxidation of MXenes,"
Gogotsi and his co-authors wrote. "The MXene film can potentially
serve as a dynamic EMI shielding switch."

For security applications, Gogotsi suggests that the MXene
shielding could hide devices from detection by radar or other
tracing systems. The team also tested the potential of a one-way
shielding switch. This would allow a device to remain
undetectable and protected from unauthorized access until it is
deployed for use.

"A one-way switch could open the protection and allow a signal to
be sent or communication to be opened in an emergency or at the
required moment," Gogotsi said. "This means it could protect
communications equipment from being influenced or tampered with
until it is in use. For example, it could encase the device
during transportation or storage and then activate only when it
is ready to be used."

The next step for Gogotsi's team is to explore additional
MXene-electrolyte combinations and mechanisms to fine-tune the
shielding to achieve a stronger modulation of electromagnetic
wave transmission and dynamic adjustment to block radiation at a
variety of bandwidths.

https://phys.org/news/2023-01-blocking-radio-electromagnetic-flip.html

This is Shortwave Radiogram in MFSK64

Please send your reception report to radiogram@verizon.net
 

This week's images ...



Aurora in Canada, with old car. https://t.ly/2TLqj ...

Sending Pic:203x117C;









A macaw parrot flies at a show in Kuwait City. https://t.ly/EuCc
...

Sending Pic:201x159C;









The far eastern curlew is the largest migratory shore bird in the
world. They start their life in Russia and north-eastern China
before flying to Australia. https://t.ly/466C ...

Sending Pic:199x127C;









The data sculpture "Artificial Realities: Coral" on a huge screen
at the World Economic Forum in Davos, Switzerland.
https://t.ly/zwrF ...

Sending Pic:197x156C;






Pink lilies that blanket Nong Han lake in Kumphawapi district of
Udon Thani province, Thailand, are in full bloom until March.
https://t.ly/sE-E ...

Sending Pic:193x187C;







The freighter Stewart J. Cort enters the harbor at Milwaukee for
winter layup, January 18. https://bit.ly/3ZKLKhJ ...

Sending Pic:199x140C;









Sunset at National Airport near Washington DC, January 13.
https://bit.ly/3QP7u7U ...

Sending Pic:170x197C;
 

Our painting of the week is "Cherry Bliss," oil on canvas, by
Daryl Gortner. https://t.ly/wO6D ...

Sending Pic:160x206C;


 

Shortwave Radiogram returns to MFSK32 ...



 

RSID: <<2023-01-20T00:58Z MFSK-32 @ 9265000+1500>>

This is Shortwave Radiogram in MFSK32 ...

 

Shortwave Radiogram is transmitted by:

WRMI, Radio Miami International, wrmi.net

and

WINB Shortwave, winb.com


Please send reception reports to radiogram@verizon.net

And visit http://swradiogram.net

Twitter: @SWRadiogram or twitter.com/swradiogram

I'm Kim Elliott. Please join us for the next Shortwave
Radiogram.

RSID: <<2023-01-19T02:49Z MFSK-64 @ 5850000+1500>>

This Is A Music Show #195
19 January 2023

0200-0300UTC Thursday on 5850 kHz

via WRMI, Okeechobee USA

***ALSO***

TIAnExpressMS w/ Radio Northern Europe International
via Channel 292 in Germany, mainly on 6070 kHz.

Broadcast various dates/times/freqs. Check the schedule here:

https://www.channel292.de/
https://rnei.org/

----------------------------------------

PLAYLIST

-----

Sun Pops Orchestra - Daihiru Sayo

-----

Sadistic Mika Band - タイムマシンにおねがい
Yellow Magic Orchestra - Rydeen
Yellow Magic Orchestra - Pure Jam
The Crap Heads - 黄金のクラップヘッズ

-----

Yukihiro Takahashi - Drip Dry Eyes
Yukihiro Takahashi - Stop In The Name Of Love
Yellow Magic Orchestra - Expected Way

-----

Sketch Show - Wonderful To Me

-----

THIS DATA w/ Bert Kaempfert - Rain

-----

Yellow Magic Orchestra - Cue

----------------------------------------

TIAMS Website:

https://thisisamusicshow.com

Go here for show archives + official shop!

-----

Please send reception reports/comments:

thisisamusicshow@gmail.com

Follow TIAMS on Twitter:

www.twitter.com/ThisIsAMusicSho/

------

Thanks for listening!

--YOUR HOST--



高橋幸宏 1952-2023
-Rest in Peace-




EOM



 

RSID: <<2023-01-19T02:51Z MFSK-64 @ 5850000+1500>>

Sending Pic:300x300Cp4;

Steve Perry of Journey was born January 22, 1949.
 

Sending Pic:192x240;



https://steveperry.com/

Please report your decode to themightykbc@gmail.com