Tag Archives: Space Weather

Radio Waves: RNZ & TVNZ Merging, Tech Keeping Ukrainians in Touch, Solar Storms Documentary, and Aspidistra

Radio Waves: Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers. To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

RNZ and TVNZ to merge (RadioInfo)

New Zealand’s Minister for Broadcasting and Media Kris Faafoi has announced the government’s decision to create a new public media entity by merging RNZ and TVNZ.

According to Faafoi, ensuring New Zealanders continue to have access to reliable, trusted, independent information and local content sits at the heart of the decision.

“The public media sector is extremely important to New Zealanders in providing them with high quality, independent, timely and relevant media content,” Faafoi said.

“But we know the media landscape is changing and the sector is having to adapt to increased competition, changing audience demands and ways of accessing media, falling revenue, and new and emerging digital platforms. We need public media which is responsive to these changes and can flourish.

“RNZ and TVNZ are each trying to adjust to the challenges, but our current public media system, and the legislation it’s based on, is focused on radio and television.

“New Zealanders are among some of the most adaptive audiences when it comes to accessing content in different ways; like their phones rather than television and radio, and from internet-based platforms. We must be sure our public media can adapt to those audience changes, as well as other challenges that media will face in the future.”

“The new public media entity will be built on the best of both RNZ and TVNZ, which will initially become subsidiaries of the new organisation. It will continue to provide what existing audiences value, such as RNZ Concert, as well as better reaching those groups who aren’t currently well served; such as our various ethnic communities and cultures,” Faafoi said[…]

Read more at: https://radioinfo.com.au/news/rnz-and-tvnz-to-merge/ © RadioInfo Australia

Technologies old and new keep Ukrainians in touch with the world (The Economist)

Battery radios and satellite internet both have jobs to do

In communist Eastern Europe a shortwave radio was a vital piece of equipment for anyone wanting to stay ahead of the censors. Stations such as the bbc World Service, Radio Free Europe and Voice of America broadcast news, entertainment and rock-and-roll across the Iron Curtain.

After the cold war ended, shortwave radios gave way to television and the internet, and the broadcasts were wound down. But on March 3rd, in the aftermath of Russia’s invasion of Ukraine, the bbc announced their return. The World Service has begun nightly news broadcasts into Ukraine and parts of Russia (see map). Continue reading →

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Radio Waves: X-Class Flare & Halloween CME, Ham Callsign History, 2/3 UK Listeners Now Digital, AM/FM Until 2030, and Rampisham’s New Plan

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Radio Waves: Stories Making Waves in the World of Radio

Significant X-class solar flare (Southgate ARC)

There was a global eruption on the sun today. It started with a powerful X1-class solar flare from sunspot AR2887.

The blast created a massive tsunami of plasma in the sun’s atmosphere, which rippled across the entire solar disk. A CME is probably heading for Earth, raising the possibility of a geomagnetic storm on Halloween. More information and updates @ Spaceweather.com.

Solar Flare Alerts: Sign up for Space Weather Alerts and get instant text notifications when solar flares are underway.

History of the Ham Radio Callsign (Southgate ARC)

In this video Mike Ritz W7VO looks at the history of amateur radio call signs in the United States

Every legal amateur radio operator in the world has a unique callsign assigned to them by their government, and many of us are better known by our callsign than our given name. But what world event was it that caused these monikers to be? Why are they constructed the way they are? Continue reading →

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New Space Weather from VLF Communications

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Image Credit: NASA

As an amateur astronomer & SWL enthusiast, I always find it interesting when both disciplines overlap. I came across an article on the Internet posted by sciencealert.com of such an overlap.

The Earth is surrounded by two radiation belts (Van Allen Belts). But something strange has been discovered. After NASA launched a space probe in 2017 – and after analyzing collected data – the two Van Allen belts have been pushed farther away from Earth by a third “area”. That area is a “man-made barrier” created by Very Low Frequency (VLF) radio communications.

Scientists postulate this new man-made VLF barrier, a form of man-made Space Weather, has pushed the two radiation belts farther from Earth. And as such, this has created a “protective bubble” from potentially dangerous solar discharges and their radiation streams.

For those interested, you can read the full article here..

Guest post by Troy Riedel

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Radio Waves: A “Calm” Solar Cycle 25, WWJ History, Czech Radio’s Digital-Only Future, and UK Ham Radio Exam Stats

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Radio Waves: Stories Making Waves in the World of Radio

Many thanks to SWLing Post contributors Ron, Mike, and the Southgate ARC for the following tips:

As Disasters Roil Earth, A New Sun Cycle Promises Calmer Weather — In Space (NPR)

Giant flares and eruptions from the sun can cause space weather, and stormy space weather can interfere with everything from satellites to the electrical grid to airplane communications. Now, though, there’s good news for people who monitor the phenomenon — the sun has passed from one of its 11-year activity cycles into another, and scientists predict that the new cycle should be just about as calm as the last.

That doesn’t mean, however, zero risk of extreme weather events. Even during the last, relatively weak solar cycle, drama on the sun triggered occasional weirdness on Earth like radio blackouts, disruptions in air traffic control, power outages — and even beautiful aurorae seen as far south as Alabama.

Over each solar cycle, the roiling sun moves from a relatively quiet period through a much more active one. Researchers monitor all this activity by keeping an eye on the number of sunspots, temporary dark patches on the sun’s surface. These spots are associated with solar activity like giant explosions that send light, energy, and solar material into space.

Counting of sunspots goes back centuries, and the list of numbered solar cycles tracked by scientists starts with one that began in 1755 and ended in 1766. On average, cycles last about 11 years.

Based on recent sunspot data, researchers can now say that so-called “Solar Cycle 24” came to an end in December of 2019. Solar Cycle 25 has officially begun, with the number of sun spots slowly but steadily increasing.[…]

WWJ in Detroit: A 2020 Centennial Station (Radio World)

Iconic AM station just celebrated the 100th anniversary of its first broadcast

It was shortly after World War I that Clarence Thompson, a partner of Lee de Forest, formed a new company Radio News & Music Inc. in New York. His goal was to encourage newspapers to broadcast their news reports by wireless, using de Forest transmitters.

The franchise offer — available to only one newspaper in each city — offered the rental of a de Forest 50-watt transmitter and accessories for $750. Just one newspaper signed up for the deal; it was the Detroit News, led by publisher William E. Scripps.

He had been interested in wireless since investing in Detroit experimenter Thomas E. Clark’s wireless company in 1904. Scripp’s son, William J. “Little Bill,” was an active ham radio operator, operating a station in the Scripps home.

People Might Laugh

Scripp proposed accepting the Radio News & Music offer and building a Detroit News radio station in 1919, but he met resistance from his board of directors. It was not until March of 1920 that he was given the go-ahead to sign a contract.

The de Forest transmitter was shipped to Detroit on May 28, 1920, but was lost in transit; a second transmitter was constructed and sent on July 15. This delayed the installation of the station until August.[…]

Czech Radio has expanded DAB + coverage to 95 percent of the population and announced the switch-off of medium waves (Digitalni Radio)

NOTE: This is a machine translation of the original post in Czech.

Czech Radio has entered another, important phase of radio digitization. To date, the ?Ro DAB + multiplex signal has reached 95% population coverage. Ten new transmitters were launched in Bohemia and Moravia. You can find a detailed description of them below.

DAB + technology is becoming a common distribution channel for Czech Radio, which will be placed on the same level as analogue FM / FM broadcasting. All marketing activities will already include the “DAB + More Radio” logo. ?eské Radiokomunikace is planning to start certification of receivers next year in order to protect customers and facilitate orientation in the range for them and retailers.

According to the CEO of Czech Radio, René Zavoral, the public service media is proceeding in accordance with a long-term strategic plan. The head of communication and press spokesman Ji?í Hošna describes the step as a turning point that can affect the direction of the entire radio market.[…]

UK amateur radio exam report released (Southgate ARC)

The RSGB Examinations Standards Committee (ESC) report covering 2019 is now available for anyone to download

The report contains statistics for the both the RSGB amateur radio exams and the Air Cadets Organisation (ACO) exam which Ofcom considers to be equivalent to the RSGB Foundation.

Ofcom has been concerned about the participation of women in amateur radio and STEM disciplines. They requested the ESC to publish figures for the number of women taking the exams. Unfortunately the results are disappointing with only 9.9% of all exams being taken by women.

Download the ESC report from
https://rsgb.org/main/blog/examination-standards-committee-reports/2020/09/18/examinations-standards-committee-report-2020-for-activities-during-2019/

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NASA Video: The Solar Cycle as seen from space

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Many thanks to SWLing Post contributor, Dave (K4SV), who shares this video courtesy of NASA Goddard:

The Sun is stirring from its latest slumber. As sunspots and flares, signs of a new solar cycle, bubble from the Sun’s surface, scientists are anticipating a flurry of solar activity over the next few years. Roughly every 11 years, at the height of this cycle, the Sun’s magnetic poles flip — on Earth, that’d be like the North and South Poles’ swapping places every decade — and the Sun transitions from sluggish to active and stormy. At its quietest, the Sun is at solar minimum; during solar maximum, the Sun blazes with bright flares and solar eruptions. In this video, view the Sun’s disk from our space telescopes as it transitions from minimum to maximum in the solar cycle.

Fascinating! Thanks for sharing, Dave!

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NASA Science Live presents “Our Next Solar Cycle”

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Many thanks to SWLing Post contributor, Paul Evans, who writes:

On Tuesday, September 15, 2020 Science at NASA had a presentation on the next solar cycle predictions.

It’s available on YouTube and other outlets without needing a login or Zoom serial number:

Fascinating! Thanks for the tip, Paul!

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NASA’s SDO produces a 10 year time-lapse video of the sun

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Many thanks to SWLing Post contributor, Ahmet (KD2AQU), who shares the following item from NASA:

As of June 2020, NASA’s Solar Dynamics Observatory – SDO – has now been watching the Sun non-stop for over a full decade. From its orbit in space around Earth, SDO has gathered 425 million high-resolution images of the Sun, amassing 20 million gigabytes of data over the past 10 years. This information has enabled countless new discoveries about the workings of our closest star and how it influences the solar system.

With a triad of instruments, SDO captures an image of the Sun every 0.75 seconds. The Atmospheric Imaging Assembly (AIA) instrument alone captures images every 12 seconds at 10 different wavelengths of light. This 10-year time lapse showcases photos taken at a wavelength of 17.1 nanometers, which is an extreme ultraviolet wavelength that shows the Sun’s outermost atmospheric layer – the corona. Compiling one photo every hour, the movie condenses a decade of the Sun into 61 minutes. The video shows the rise and fall in activity that occurs as part of the Sun’s 11-year solar cycle and notable events, like transiting planets and eruptions. The custom music, titled “Solar Observer,” was composed by musician Lars Leonhard.