Category Archives: Space Weather

February 2, 2022: A low-hazard CME could bring auroras to low latitudes and affect HF propagation

Many thanks to SWLing Post contributor, Ed, who shares the following news from Spaceweather.com:

GEOMAGNETIC STORM WATCH: A coronal mass ejection (CME) is heading for Earth. Estimated time of arrival: Feb. 2nd. This movie from SOHO shows the halo CME leaving the sun:

It was hurled into space during the early hours of Jan. 30th by an M1-class solar flare. Big sunspot AR2936 was the source of the blast. The long duration flare lasted more than 4 hours, so it put plenty of power into the CME.

A newly-released forecast model from NOAA shows the likely timing of impact:

Continue reading and follow updates at Spaceweather.com.

Spread the radio love

Radio Waves: Pocket SSB Transceiver, Radio On The Bay Event, New Book on History of Spaceweather, and PSK31 on 437 MHz from the Moon

3 Replies

The uSDX/uSDR QRP transceiver (Chinese version)

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!

Ham Radio SSB Transceiver Fits in Pocket (Hackaday)

Talking about this Chinese ham radio transceiver requires a veritable flurry of acronyms: HF, SSB, QRP, and SDR to start with. [Paul] does a nice job of unboxing the rig and checking it out. The radio is a clone of a German project and provides a low-power radio with a rechargeable battery. You can see his video about the gear below.

SSB is an odd choice for low power operation, although we wonder if you couldn’t feed digital data in using a mode like PSK31 that has good performance at low power. There are several variations of the radio available and they cost generally less than $200 — sometimes quite a bit less.

There isn’t much on the front of the radio. There are a few buttons, a rotary encoder, and an LCD along with a speaker and microphone built-in. There are ports for power to run the radio if you want to not use the battery and a separate port for battery charging. There are also ports for a key, external microphone and speakers, and audio connections that look like they’d work for digital modes. According to commenters, the radio doesn’t have an internal charging circuit, so you have to be careful what you plug into the charging port. [Continue reading…]

(SIDE NOTE: I have been testing one of the USDX / USDR transceivers (a Chinese version–not the open source homebrew project) over at QRPer.com and have been very displeased with performance. So much so, I returned it for a refund. One of the biggest issues being spurious emissions that were produced in harmonics, but also the receiver is one of the worst I’ve ever tested. -Thomas) Continue reading →

Spread the radio love

Radio Waves: DAB on UK Smart Speakers, MORE Project, Sun Getting Busy, and RTI’s German special “garners thousands of responses”

5 Replies

Radio Waves: Stories Making Waves in the World of Radio

Many thanks to SWLing Post contributors Skip Arey, Mike Hansgen, and David Iurescia for the following tips:

Nobody cares about DAB radio – so let’s force it onto smart speakers, suggests UK govt review (The Register)

Britain’s anti Amazon and Google war gets a second front

The UK may require smart speakers such as Amazon Echo and Google Home devices to broadcast UK DAB radio stations, over government fears that Brits aren’t consuming enough of the unloved radio tech.

Under the guise of “protecting UK radio stations’ accessibility” the Department for Culture, Media and Sport (DCMS) has published a report calling for smart speakers to rebroadcast domestic radio stations’ output. The recommendation is as follows:

The government to consider regulatory changes to ensure radio stations and radio and audio content can be easily found and is discoverable by users of voice assistant platforms, including smart speakers and in-car infotainment systems.

The call, made in the Ministry of Fun’s Digital Radio and Audio Review, was backed by national broadcaster the BBC and commercial radio groups.

The same report found that 64 per cent of audio on smart speakers is live radio, though smart speaker users make up around 6 per cent of radio listeners at present. Nonetheless, DCMS called for governmental action to enforce the provision of something that’s already provided.

Media minister Julia Lopez said in a canned statement: “We must make sure this treasured medium continues to reach audiences as listening shifts to new technologies and that we have a gradual transition away from FM to protect elderly listeners and those in remote areas.” [Continue reading…]

Interested in getting a U.S. Amateur Radio license? (David Sarnoff Radio Club)

Earlier this year, the IEEE Princeton / Central Jersey Section’s Broadcast Technology Chapter (IEEE PCJS BT) received a generous grant to provide mentoring and equipment that encourages understanding of digital and analog aspects of radio communication, through hands-on activities and explorations. Over the next 2 years, our Make Operating Radio Easier (MORE) Project will be training 500 new U.S. Amateur Radio (“Ham”) operators in small (10 to 15 person) groups. We are especially seeking youth (ages 12-18) and non-males to help increase the demographics for these underrepresented groups on the air, but are currently accepting applicants of all ages (12+) and all genders.

Class sessions are primarily virtual (via Zoom) but may be arranged to be on-site if there is sufficient interest by a school, club or organization (as allowed, given the ongoing health situation). Virtual or in-person FCC amateur license testing sessions will also be arranged (throughout the USA) by our ARRL-certified MORE Project Volunteer Examiner (VE) team. There is no charge for the classes, and ALL testing and licensing fees for participants in the MORE Project are covered by our grant. Trainees in our program will also receive (paid by the MORE Project) a Software Defined Radio USB dongle, a pre-assembled 25-foot longwire receiving antenna, and (after successfully licensing) a hand-held Yaesu 2 Meter (HT) radio. The MORE Project course will provide instruction in the use of this equipment and assistance in Getting On The Air (GOTA) to make radio contacts.

Additional information about the MORE Project, including how to register for a training course, is at n2re.org/m-o-r-e-project and in our IEEE PCJS Call for Participation flyer. Questions should be directed to Dr. Rebecca Mercuri K3RPM at [email protected].

Our Sun is About to Get Busy | Solar Storm Forecast 10.25.2021 (Tamitha Skove)

RTI’s German-language special program garners thousands of responses (RTI)

During the third quarter of every year, Radio Taiwan International (RTI) broadcasts a special one-hour radio program via shortwave directly to German-speaking countries. The programs were transmitted over four weekends between July and August. Usually, RTI’s German programs are relayed through Bulgaria.

This year, thanks to conducive weather conditions and precise engineering, RTI’s signal was stronger than in prior years. In response to the program, listeners from 33 countries sent over a thousand reception reports confirming they received the broadcast. According to RTI, it received a record number of reports.

Radio Taiwan International President Chang Cheng says that even though most of the station’s programs are available online, there is still a significant community of people that prefers listening to shortwave radio.

This year, listeners who sent in a reception report for the special one-hour broadcast will receive a limited edition RTI QSL card featuring Taiwan’s iconic Formosan Blue Magpie. RTI says that it is still in the process of responding to all of the listening reports it received.

Do you enjoy the SWLing Post?

Please consider supporting us via Patreon or our Coffee Fund!

Your support makes articles like this one possible. Thank you!

Spread the radio love

Radio Waves: Solar Cycle 25 Looking Up, Vintage Radio Flea Market Finds, the SBITX SDR, and More Power to Radio Caroline

Radio Waves: Stories Making Waves in the World of Radio

Many thanks to SWLing Post contributors Eric McFadden, Ken Carr, Mike Terry, Pete Eaton, and the Southgate ARC for the following tips:

Revised prediction for Solarcycle 25 (Southgate ARC)

A revised prediction from the NASA High Altitude Observatory based at the University Of Colorado.

NASA Heliophysicists have released a revised prediction for Solar Cycle 25.
The report generated by Ricky Egeland a Solar Physicist working in the NASA Space Radiation Analysis Group now calls for the peak of Solar Cycle 25 to top out at a value of 195 ± 17 based upon the new scale for calculating Smoothed Sun Spot Number. For reference Solar Cycle 21 peaked at an SSN 233 (new scale) while Solarcycle 23 peaked at an SSN of 180 (new scale). If this predictions holds up Ham Radio will see Excellent Worldwide F Layer Conditions on 10 Meters for several years around Solar Max. 6 Meters conditions should be good in the Equinox Periods before and after Solar Max with consistent openings on Medium Haul Polar Routes. 6 Meter routes traversing the equator should experience consistent openings ± 9 months from Solar Max.

Ricky Egeland is a particpating member in the group headed up by Scott McIntosh and Bob Leamon that published a paper 9 months ago outlining the existance magnetic bands within the Sun that govern the Sunspot and Hale Cycles. At the time of its publishing the paper went on to predict the peak of Solar Cycle 25 could be as high Solarcycle 21. Today’s released is a revised prediction based upon data observed since the original paper was published. To be sure we are still in early days.

The Solar Rotation Cycle as marked by Sunspot Activity was established on April 19, 2021 so we are only 90 Days into actually observing Cycle 25 Activity. It is now agreed the dramactic run-up in Sunspot Activity we experienced late Last Fall while tied to Cycle 25 was an outlier. When asked directly about whether they can declare if the Terminator Event they wrote about in the Fall 2020 Paper has occurred Scott McIntosh stated “We can’t be sure just yet but we are very very close”. It also should be noted that while it has been over a year since the sun produced a Cycle 24 Region with a Sunspot worthy of a NASA Classification the Sun has been steadily producing Spotless SC 24 Active Regions the last of which formed right on the Solar Equator at N00-W54 on July 24,2021 as recorded by Jan Alvestad’s Solar Terrestial Activity Report Website. These Active Regions being part of a Solarcycle in its final stages of existence produce no spots and only last for a few hours before they dissipate away. The previous SC24 Active Region formed on June 28, 2021. Once the SC24 active regions cease forming Solar Cycle 25 will take off in earnest.

Bob Marston AA6XE

Bob Marston AA6XE email – [email protected]
Ricky Egeland email – [email protected]
Scott McIntosh email – [email protected]
Bob Leamon via Twitter – https://twitter.com/leamonrj

Flea Market Finds at the Vintage Radio & Communications Museum of Connecticut (KE1RI)

I have an addiction to old radios, especially anything that was manufactured in the 1923-1950 period. That may seem like a long time to some folks but when you gain senior citizen status 25 years is a blink of the eye. This love of old radios is tempered by the limited display space that I have in my home. I am at the point where I am very selective when it comes to buying a new radio. Although there is always room for another ‘small’ radio I am somehow attracted to the larger models. A rough count of the full-size consoles in this house (and garage and shed) comes to about 11. Just in this room (second floor radio shack) there are 5 console radios, two of which reside in the closet. The only surprise is that my wife has not tossed the radios and me out by now.

So, it is no surprise that I enjoy attending radio flea markets. Most of the events I frequent are either in Connecticut or Massachusetts. Rhode Island has very little in the way of antique radio flea markets (although we do have a great wireless and steam museum). And you can forget about eBay. Radios on eBay usually have inflated prices and descriptions. Even if you do find something reasonable the shipping for anything bigger than an All American Five table model is very costly and hazardous (many are damaged during shipping).

This is where the Vintage Radio & Communications Museum of Connecticut (VRCMC) comes in. This is a wonderful museum that has an enormous collection of radios and other communication-related technological wonders. They also hold regular flea markets to help raise funds needed to run the museum. During the cold months the events are inside (limited space) and during warm seasons (April, June, September) they are outside (plenty of space). This year I attended the first Spring event that was held on April 13, 2021. It was a great success! [Click here to continue reading…]

SBITX: Hackable HF SDR for the Raspberry Pi (Hackaday)

Cheap, easy to use SDR dongles are an immensely powerful tool for learning about radio technology. However, building your own SDR is not something too many hackers are confident to tackle. [Ashhar Farhan, VU2ESE] hopes to change this with the sBITX, a hackable HF SDR transceiver designed around the Raspberry Pi.

[Ashhar] introduced the project in talk at the virtual “Four Days In May” annual conference of the QRP Amateur Radio Club International. Watch the full talk in the video after the break. He first goes over the available open source SDR radios, and then delves into his design decisions for the sBITX. One of the primary goals of the project was to lower the barrier of entry. To do this, he chose the Raspberry Pi as base, and wrote C code that that anyone who has done a bit of Arduino programming should be able to understand and modify. The hardware is designed to be as simple as possible. On the receive side, a simple superheterodyne architecture is used to feed a 25 kHz wide slice of RF spectrum to an audio codec, which send the digitized audio to the Raspberry Pi. The signal is then demodulated in software using FFT. For transmit, the signal is generated in software, and then upconverted to the desired RF frequency. [Ashhar] also created a GUI for the 7? Raspberry Pi screen.[…]

Ofcom agrees for Radio Caroline to turn up the power (Community Radio Today)

A power increase has been agreed for Radio Caroline to extend its coverage area from Suffolk and Essex to include Kent as East Sussex.

The station is broadcasting under a community radio licence and was originally granted 1kW of power on 648 AM in 2018. The actual power increase amount has not been announced.

Ofcom says a power increase was agreed to combat man made noise and interference in the existing coverage area, and to extend coverage to adjoining areas.

While the subsequent increase in the licensed area was considered to be significant, the decision-maker deemed there to be exceptional circumstances in order to approve this request, saying the service has experienced high levels of background noise and interference, particularly in urban areas.

The licensee also serves a ‘community of interest’ as opposed to a defined geographic community meaning the service is positioned to be accessible to the community of interest in the proposed extended areas.[…]

Do you enjoy the SWLing Post?

Please consider supporting us via Patreon or our Coffee Fund!

Your support makes articles like this one possible. Thank you!

Spread the radio love

Radio Waves: NRAO Turns Scope System Into Planetary Radar, WBCQ Seeks Engineers, Deep Space Network Upgrades, and 2021 Propagation Summit

Radio Waves: Stories Making Waves in the World of Radio

Successful Test Paves Way for New Planetary Radar (NRAO)

The National Science Foundation’s Green Bank Observatory (GBO) and National Radio Astronomy Observatory (NRAO), and Raytheon Intelligence & Space conducted a test in November to prove that a new radio telescope system can capture high-resolution images in near-Earth space.

GBO’s Green Bank Telescope (GBT) in West Virginia — the world’s largest fully steerable radio telescope — was outfitted with a new transmitter developed by Raytheon Intelligence & Space, allowing it to transmit a radar signal into space. The NRAO’s continent-wide Very Long Baseline Array (VLBA) received the reflected signal and produced images of the Apollo 15 moon landing site.

The proof-of-concept test, culminating a two-year effort, paves the way for designing a more powerful transmitter for the telescope. More power will allow enhanced detection and imaging of small objects passing by the Earth, moons orbiting around other planets and other debris in the Solar System.

The technology was developed as part of a cooperative research and development agreement between NRAO, GBO, and Raytheon.

“This project opens a whole new range of capabilities for both NRAO and GBO,” said Tony Beasley, director of the National Radio Astronomy Observatory and vice president for Radio Astronomy at Associated Universities, Inc. (AUI). “We’ve participated before in important radar studies of the Solar System, but turning the GBT into a steerable planetary radar transmitter will greatly expand our ability to pursue intriguing new lines of research.”

Using the information collected with this latest test, the participants will finalize a plan to develop a 500-kilowatt, high-power radar system that can image objects in the Solar System with unprecedented detail and sensitivity. The increased performance also will allow astronomers to use radar signals as far away as the orbits of Uranus and Neptune, increasing our understanding of the Solar System.

“The planned system will be a leap forward in radar science, allowing access to never before seen features of the Solar System from right here on Earth,” said Karen O’Neil, the Green Bank Observatory site director.

“Raytheon’s radar techniques could ultimately improve our ability to explore the Solar System,” said Steven Wilkinson, Principal Engineering Fellow at Raytheon Intelligence & Space. “Working with the astronomy community allows us to apply decades of radar know-how to a project that provides high-resolution images of near-Earth objects.”

“We are excited to be partnering with Raytheon and applying their radar expertise to transform our observatories’ telescopes in new science areas,” said AUI President Adam Cohen.

The National Radio Astronomy Observatory and the Green Bank Observatory are facilities of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.[…]

WBCQ: Radio transmitter engineers wanted

WBCQ Radio is seeking radio transmitter engineers to work at our 500KW shortwave station. Come to northern Maine and get away from it all. Nice working environment, good pay, great people, fun work with BIG transmitting and antenna equipment. Contact Allan and Angela Weiner at 207-538-9180. Please send resumes to [email protected].

Deep Space Network upgrades and new antennas increase vital communication capabilities (NASA)

NASA’s Deep Space Network, commonly referred to as the DSN, has welcomed a new dish, Deep Space Station 56, to its family of powerful ground listening stations around the world.

The now-operational 34-meter antenna joins the network’s Madrid Deep Space Communications Complex located 60 kilometers west of Madrid, Spain while other dishes within the network undergo critical upgrades.

The new dish is part of an ongoing series of enhancements to the DSN, which traces its roots back to January 1958 when the U.S. Army’s Jet Propulsion Lab was tasked with standing up a series of communications stations in Nigeria, Singapore, and the U.S. state of California to support orbital telemetry operations for the Explorer 1 mission.

This precursor to the Deep Space Network was transferred to NASA along with the Jet Propulsion Lab on 3 December 1958. The DSN was then formally commissioned by the U.S. space agency as a way to consolidate the pending deep space communication needs through centralized locations to avoid each mission having to create its own ground listening station(s).

The three Deep Space Network ground locations are spaced roughly 120 degrees from each other in Canberra, Australia; Goldstone, California; and Madrid, Spain. The location of the three facilities ensures deep space missions with a line of sight to Earth can communicate with at least one of the locations at any time.

Updates throughout the decades have increased the network’s capabilities, most notably for the two Voyager probes that continue to operate and send back science data having both long-passed out of the heliosphere and into the interstellar medium.

The network, nonetheless, is showing its age, with upgrades and refurbishments needed to ensure continuous operations. Part of this initiative is the recent addition of the new dish, Deep Space Station 56 (DSS-56), at the Madrid complex.

“After the lengthy process of commissioning, the DSN’s most-capable 34-meter antenna is now talking with our spacecraft,” said Bradford Arnold, DSN project manager at the Jet Propulsion Laboratory.[…]

2021 Propagation Summit Session Recordings Available (ARRL News)

YouTube recordings and PDF files from the 2021 Propagation Summit hosted on January 23 by Contest University are available. More than 1,000 logged in for the sessions. Each presentation begins approximately on the hour. You can advance the video to the presentation you wish to view.

11 AM – “Update on the Personal Space Weather Station Project and HamSCI Activities for 2021” by Dr. Nathaniel Frissell, W2NAF

12 Noon – “Solar Cycle 25 Predictions and Progress” by Carl Luetzelschwab, K9LA

1 PM – “Maximizing Performance of HF Antennas with Irregular Terrain” by Jim Breakall, WA3FET

2 PM – “HF Propagation: What to Expect During the Rising Years of Solar Cycle 25,” by Frank Donovan, W3LPL.

Slides decks are available for each presentation in PDF format: Frissell; Luetzelschwab; Breakall, and Donovan. […]

Do you enjoy the SWLing Post?

Please consider supporting us via Patreon or our Coffee Fund!

Your support makes articles like this one possible. Thank you!

Spread the radio love

New Space Weather from VLF Communications

7 Replies

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

Spread the radio love

Solar Cycle 25: Sunspot Cycle “Could Be One Of The Strongest On Record”

9 Replies

(Source: SpaceRef via Eric McFadden)

In direct contradiction to the official forecast, a team of scientists led by the National Center for Atmospheric Research (NCAR) is predicting that the Sunspot Cycle that started this fall could be one of the strongest since record-keeping began.

In a new article published in Solar Physics, the research team predicts that Sunspot Cycle 25 will peak with a maximum sunspot number somewhere between approximately 210 and 260, which would put the new cycle in the company of the top few ever observed.

The cycle that just ended, Sunspot Cycle 24, peaked with a sunspot number of 116, and the consensus forecast from a panel of experts convened by the National Aeronautics and Space Administration (NASA) and the National Oceanic and Atmospheric Administration (NOAA) is predicting that Sunspot Cycle 25 will be similarly weak. The panel predicts a peak sunspot number of 115.

If the new NCAR-led forecast is borne out, it would lend support to the research team’s unorthodox theory – detailed in a series of papers published over the last decade – that the Sun has overlapping 22-year magnetic cycles that interact to produce the well-known, approximately 11-year sunspot cycle as a byproduct. The 22-year cycles repeat like clockwork and could be a key to finally making accurate predictions of the timing and nature of sunspot cycles, as well as many of the effects they produce, according to the study’s authors.[…]

Click here to continue reading the full article.

Spread the radio love