#radioastronomy — Public Fediverse posts

New in the #VirtualObservatory: “4-8GHz TMRT obs. of WISE point sources” by Liu J.-T. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/282/15
#AstrophysicalMasers #InfraredSources #RadioAstronomy #InterstellarMedium

📡 ESO has rolled out major upgrades to the ALMA Science Archive (25 Aug 2026). The query interface can now search spectral lines detected by ADMiT in public ALMA data — by molecule, transition, redshift or line intensity. Histograms show value distributions across the whole archive. ALMA data are public and free.

https://www.eso.org/sci/publications/announcements/sciann17801.html

#RadioAstronomy #DataScience #Astronomy #Science

📡 ESO has rolled out major upgrades to the ALMA Science Archive (25 Aug 2026). The query interface can now search spectral lines detected by ADMiT in public ALMA data — by molecule, transition, redshift or line intensity. Histograms show value distributions across the whole archive. ALMA data are public and free.

https://www.eso.org/sci/publications/announcements/sciann17801.html

#RadioAstronomy #DataScience #Astronomy #Science

📡 ESO has rolled out major upgrades to the ALMA Science Archive (25 Aug 2026). The query interface can now search spectral lines detected by ADMiT in public ALMA data — by molecule, transition, redshift or line intensity. Histograms show value distributions across the whole archive. ALMA data are public and free.

https://www.eso.org/sci/publications/announcements/sciann17801.html

#RadioAstronomy #DataScience #Astronomy #Science

📡 ESO has rolled out major upgrades to the ALMA Science Archive (25 Aug 2026). The query interface can now search spectral lines detected by ADMiT in public ALMA data — by molecule, transition, redshift or line intensity. Histograms show value distributions across the whole archive. ALMA data are public and free.

https://www.eso.org/sci/publications/announcements/sciann17801.html

#RadioAstronomy #DataScience #Astronomy #Science

📡 ESO has rolled out major upgrades to the ALMA Science Archive (25 Aug 2026). The query interface can now search spectral lines detected by ADMiT in public ALMA data — by molecule, transition, redshift or line intensity. Histograms show value distributions across the whole archive. ALMA data are public and free.

https://www.eso.org/sci/publications/announcements/sciann17801.html

#RadioAstronomy #DataScience #Astronomy #Science

The Power of the Whisper: How WSPR and WSJT-X are Redefining Long-Distance Radio

1,250 words, 7 minutes read time.

Amateur radio operators and technology enthusiasts are currently utilizing the Weak Signal Propagation Reporter, commonly known as WSPR, and the WSJT-X software suite to achieve global communication using minimal power. Developed by Nobel laureate Joe Taylor, K1JT, this digital protocol allows stations to send and receive signals that are often completely buried in background noise, making it possible to map atmospheric conditions and radio propagation in real-time. This technology serves as a critical entry point for men looking to understand the mechanics of the ionosphere and the efficiency of modern digital signal processing. By leveraging advanced mathematical algorithms, WSPR proves that high-power amplifiers and massive antenna towers are no longer the only way to reach across the ocean, offering a technical challenge that rewards precision and patience over brute force.

The core of this system lies in the software known as WSJT-X. This program implements several digital protocols designed specifically for making reliable communication under extreme conditions where traditional voice or Morse code signals would fail. While WSPR is not a conversational mode, it acts as a global beacon system. A station transmits a brief packet containing its callsign, location grid square, and power level. Thousands of other stations around the world, running the same software, listen for these signals and automatically report any successful decodes to a central internet database called WSPRnet. This creates a living, breathing map of how radio waves are traveling across the planet at any given second, providing invaluable data for anyone interested in the science of communication.

Understanding the physics behind this process is what separates a casual observer from a true radio technician. The Earth’s ionosphere, a layer of the atmosphere ionized by solar radiation, acts as a mirror for certain radio frequencies. Depending on the time of day, solar flare activity, and the season, these signals can skip off the sky and land thousands of miles away. In the past, confirming these paths required luck and high-power transmissions. Joe Taylor once noted that the goal of these modes is to utilize the information-theoretic limits of the channel. This means squeezing every bit of data through the smallest amount of bandwidth possible, allowing a station running only one watt of power to be heard in Antarctica from a backyard in Michigan.

For the man standing on the threshold of earning his amateur radio license, WSPR is the ultimate proof of concept. It removes the intimidation factor of “talking” to strangers and replaces it with a pure engineering objective: How far can my signal go with the least amount of effort? Setting up a WSPR station requires a computer, a transceiver, and a simple wire antenna. The software handles the heavy lifting of Forward Error Correction and narrow-band filtering. This process teaches the fundamentals of station grounding, signal-to-noise ratios, and frequency stability—skills that are mandatory for passing the licensing exam and, more importantly, for operating a professional-grade station.

The hardware requirements are surprisingly modest, which appeals to the practical, DIY-oriented mind. Many enthusiasts use a Raspberry Pi or an older laptop dedicated to the task. The interface between the radio and the computer is the critical link, ensuring that the audio generated by the software is cleanly injected into the radio’s transmitter. If the audio levels are too high, the signal becomes distorted, “splattering” across the band and becoming unreadable. This level of technical discipline is exactly what is required in high-stakes fields like aviation or telecommunications. Mastering the “clean” signal is a badge of honor in the ham radio community, signifying a man who knows his equipment inside and out.

As we look at the data generated by WSPR, we see more than just dots on a map; we see the pulse of the sun. Because radio propagation is tied directly to solar activity, WSPR users are often the first to notice a solar storm or a sudden ionospheric disturbance. When the sun emits a massive burst of energy, the higher frequency bands might “open up,” allowing for incredible distances to be covered on low power. Conversely, a solar blackout can shut down communication entirely. Being able to read these signs and adjust one’s strategy accordingly is a core component of the hobby. It turns a simple radio into a scientific instrument used for environmental monitoring.

The community surrounding WSJT-X is one of rigorous peer review and constant improvement. The software is open-source, meaning the code is available for anyone to inspect and refine. This transparency has led to a rapid evolution of the protocols. While WSPR is for propagation reporting, other modes within the suite like FT8 or FST4 are used for rapid-fire contacts. However, WSPR remains the gold standard for testing antennas. If a man builds a new wire antenna in his yard, he doesn’t have to wait for someone to answer his call to know if it works. He can run WSPR for an hour, check the online map, and see exactly where his signal landed. It provides immediate, objective feedback that is essential for any technical project.

The future of this technology points toward even more robust communication in the face of increasing electronic noise. As our cities become more crowded with Wi-Fi, power lines, and electronics, the “noise floor” of the radio spectrum is rising. Traditional modes are struggling to compete. Digital modes like those found in WSJT-X are the solution, using digital signal processing to “dig” signals out of the static. This represents the next frontier of amateur radio—the transition from analog heritage to digital mastery. For those looking to get involved, the barrier to entry has never been lower, and the potential for discovery has never been higher.

In the broader context of emergency preparedness and global infrastructure, the lessons learned from WSPR are invaluable. In a scenario where satellites or internet backbones fail, the ability to bounce low-power signals off the atmosphere remains one of the only viable long-distance communication methods. A man who understands how to deploy a WSPR-capable station is a man who can provide data and connectivity when everything else goes dark. This sense of utility and self-reliance is a driving force for many who pursue their license. It is not just about a hobby; it is about mastering a fundamental force of nature to ensure that the lines of communication stay open, no matter the circumstances.

Call to Action

If this story caught your attention, don’t just scroll past. Join the community—men sharing skills, stories, and experiences. Subscribe for more posts like this, drop a comment about your projects or lessons learned, or reach out and tell me what you’re building or experimenting with. Let’s grow together.

D. Bryan King

Sources

• WSJT-X Main Page: physics.princeton.edu/pulsar/k1jt/wsjtx.html
• WSPRnet Official Site: wsprnet.org/drupal/
• ARRL – What is WSPR?: arrl.org/wspr
• K1JT’s WSPR Implementation Guide: physics.princeton.edu/pulsar/k1jt/WSPR_Instructions.pdf
• WSPR on Raspberry Pi – GitHub: github.com/JamesP6000/WsprryPi
• Make Magazine – Ham Radio for Beginners: makezine.com/projects/ham-radio-for-beginners/
• Introduction to Digital Modes – OnAllBands: onallbands.com/digital-modes-101-wspr/
• DX Engineering – WSPR Equipment: dxengineering.com/search/product-line/wsjt-x-interfaces
• Radio Society of Great Britain – WSPR Intro: rsgb.org/main/get-started-in-ham-radio/digital-modes/wspr/
• Ham Radio School – Digital Mode Basics: hamradioschool.com/digital-modes-introduction/
• The History of WSJT-X – Princeton University: princeton.edu/news/2017/10/18/nobel-prize-winner-taylor-channels-passion-radio
• WSPR Rocks – Real-time Database: wspr.rocks
• Antenna Theory for Digital Modes: antenna-theory.com
• HF Propagation Basics – NOAA: swpc.noaa.gov/phenomena/hf-radio-propagation
• Digital Radio Mondiale and WSPR – IEEE: ieee.org/publications/wspr-technical-overview

Disclaimer:

The views and opinions expressed in this post are solely those of the author. The information provided is based on personal research, experience, and understanding of the subject matter at the time of writing. Readers should consult relevant experts or authorities for specific guidance related to their unique situations.

Related Posts

Rate this:

The Power of the Whisper: How WSPR and WSJT-X are Redefining Long-Distance Radio

1,250 words, 7 minutes read time.

Amateur radio operators and technology enthusiasts are currently utilizing the Weak Signal Propagation Reporter, commonly known as WSPR, and the WSJT-X software suite to achieve global communication using minimal power. Developed by Nobel laureate Joe Taylor, K1JT, this digital protocol allows stations to send and receive signals that are often completely buried in background noise, making it possible to map atmospheric conditions and radio propagation in real-time. This technology serves as a critical entry point for men looking to understand the mechanics of the ionosphere and the efficiency of modern digital signal processing. By leveraging advanced mathematical algorithms, WSPR proves that high-power amplifiers and massive antenna towers are no longer the only way to reach across the ocean, offering a technical challenge that rewards precision and patience over brute force.

The core of this system lies in the software known as WSJT-X. This program implements several digital protocols designed specifically for making reliable communication under extreme conditions where traditional voice or Morse code signals would fail. While WSPR is not a conversational mode, it acts as a global beacon system. A station transmits a brief packet containing its callsign, location grid square, and power level. Thousands of other stations around the world, running the same software, listen for these signals and automatically report any successful decodes to a central internet database called WSPRnet. This creates a living, breathing map of how radio waves are traveling across the planet at any given second, providing invaluable data for anyone interested in the science of communication.

Understanding the physics behind this process is what separates a casual observer from a true radio technician. The Earth’s ionosphere, a layer of the atmosphere ionized by solar radiation, acts as a mirror for certain radio frequencies. Depending on the time of day, solar flare activity, and the season, these signals can skip off the sky and land thousands of miles away. In the past, confirming these paths required luck and high-power transmissions. Joe Taylor once noted that the goal of these modes is to utilize the information-theoretic limits of the channel. This means squeezing every bit of data through the smallest amount of bandwidth possible, allowing a station running only one watt of power to be heard in Antarctica from a backyard in Michigan.

For the man standing on the threshold of earning his amateur radio license, WSPR is the ultimate proof of concept. It removes the intimidation factor of “talking” to strangers and replaces it with a pure engineering objective: How far can my signal go with the least amount of effort? Setting up a WSPR station requires a computer, a transceiver, and a simple wire antenna. The software handles the heavy lifting of Forward Error Correction and narrow-band filtering. This process teaches the fundamentals of station grounding, signal-to-noise ratios, and frequency stability—skills that are mandatory for passing the licensing exam and, more importantly, for operating a professional-grade station.

The hardware requirements are surprisingly modest, which appeals to the practical, DIY-oriented mind. Many enthusiasts use a Raspberry Pi or an older laptop dedicated to the task. The interface between the radio and the computer is the critical link, ensuring that the audio generated by the software is cleanly injected into the radio’s transmitter. If the audio levels are too high, the signal becomes distorted, “splattering” across the band and becoming unreadable. This level of technical discipline is exactly what is required in high-stakes fields like aviation or telecommunications. Mastering the “clean” signal is a badge of honor in the ham radio community, signifying a man who knows his equipment inside and out.

As we look at the data generated by WSPR, we see more than just dots on a map; we see the pulse of the sun. Because radio propagation is tied directly to solar activity, WSPR users are often the first to notice a solar storm or a sudden ionospheric disturbance. When the sun emits a massive burst of energy, the higher frequency bands might “open up,” allowing for incredible distances to be covered on low power. Conversely, a solar blackout can shut down communication entirely. Being able to read these signs and adjust one’s strategy accordingly is a core component of the hobby. It turns a simple radio into a scientific instrument used for environmental monitoring.

The community surrounding WSJT-X is one of rigorous peer review and constant improvement. The software is open-source, meaning the code is available for anyone to inspect and refine. This transparency has led to a rapid evolution of the protocols. While WSPR is for propagation reporting, other modes within the suite like FT8 or FST4 are used for rapid-fire contacts. However, WSPR remains the gold standard for testing antennas. If a man builds a new wire antenna in his yard, he doesn’t have to wait for someone to answer his call to know if it works. He can run WSPR for an hour, check the online map, and see exactly where his signal landed. It provides immediate, objective feedback that is essential for any technical project.

The future of this technology points toward even more robust communication in the face of increasing electronic noise. As our cities become more crowded with Wi-Fi, power lines, and electronics, the “noise floor” of the radio spectrum is rising. Traditional modes are struggling to compete. Digital modes like those found in WSJT-X are the solution, using digital signal processing to “dig” signals out of the static. This represents the next frontier of amateur radio—the transition from analog heritage to digital mastery. For those looking to get involved, the barrier to entry has never been lower, and the potential for discovery has never been higher.

In the broader context of emergency preparedness and global infrastructure, the lessons learned from WSPR are invaluable. In a scenario where satellites or internet backbones fail, the ability to bounce low-power signals off the atmosphere remains one of the only viable long-distance communication methods. A man who understands how to deploy a WSPR-capable station is a man who can provide data and connectivity when everything else goes dark. This sense of utility and self-reliance is a driving force for many who pursue their license. It is not just about a hobby; it is about mastering a fundamental force of nature to ensure that the lines of communication stay open, no matter the circumstances.

Call to Action

If this story caught your attention, don’t just scroll past. Join the community—men sharing skills, stories, and experiences. Subscribe for more posts like this, drop a comment about your projects or lessons learned, or reach out and tell me what you’re building or experimenting with. Let’s grow together.

D. Bryan King

Sources

• WSJT-X Main Page: physics.princeton.edu/pulsar/k1jt/wsjtx.html
• WSPRnet Official Site: wsprnet.org/drupal/
• ARRL – What is WSPR?: arrl.org/wspr
• K1JT’s WSPR Implementation Guide: physics.princeton.edu/pulsar/k1jt/WSPR_Instructions.pdf
• WSPR on Raspberry Pi – GitHub: github.com/JamesP6000/WsprryPi
• Make Magazine – Ham Radio for Beginners: makezine.com/projects/ham-radio-for-beginners/
• Introduction to Digital Modes – OnAllBands: onallbands.com/digital-modes-101-wspr/
• DX Engineering – WSPR Equipment: dxengineering.com/search/product-line/wsjt-x-interfaces
• Radio Society of Great Britain – WSPR Intro: rsgb.org/main/get-started-in-ham-radio/digital-modes/wspr/
• Ham Radio School – Digital Mode Basics: hamradioschool.com/digital-modes-introduction/
• The History of WSJT-X – Princeton University: princeton.edu/news/2017/10/18/nobel-prize-winner-taylor-channels-passion-radio
• WSPR Rocks – Real-time Database: wspr.rocks
• Antenna Theory for Digital Modes: antenna-theory.com
• HF Propagation Basics – NOAA: swpc.noaa.gov/phenomena/hf-radio-propagation
• Digital Radio Mondiale and WSPR – IEEE: ieee.org/publications/wspr-technical-overview

Disclaimer:

The views and opinions expressed in this post are solely those of the author. The information provided is based on personal research, experience, and understanding of the subject matter at the time of writing. Readers should consult relevant experts or authorities for specific guidance related to their unique situations.

Related Posts

Rate this:

" It is hailed as a global endeavour to explore the hidden universe – a powerful telescope comprising more than 130,000 antennae being built in outback Western Australia. But while the venture is being lauded as one of the most significant scientific endeavours of the 21st century, the Guardian can reveal that the organisation managing the funds of 16 member states has been rocked by allegations of financial misconduct."

https://www.theguardian.com/science/2025/aug/22/square-kilometre-array-observatory-skao-western-australia-radio-telescope-misconduct-allegations-ntwnfb

#Astronomy #RadioAstronomy #SKAO

𝗦𝗰𝗶𝗲𝗻𝘁𝗶𝘀𝘁𝘀 𝗦𝗽𝗼𝘁 '𝗘𝘆𝗲 𝗼𝗳 𝗦𝗮𝘂𝗿𝗼𝗻' 𝗶𝗻 𝗗𝗲𝗲𝗽 𝗦𝗽𝗮𝗰𝗲
Astronomers have discovered the cosmic "Eye of Sauron" - a supermassive black hole's jet pointing directly at Earth, solving a decade-long mystery about cosmic neutrino sources.
#blackholes #CosmicJets #astronomy #lordoftherings #ScienceAndSpace #radioastronomy #relativistic
https://www.ancient-origins.net/news-science-space/eye-sauron-black-hole-0022344

The ‘cosmic clocks’ preparing SKAO for early science

Observations of pulsars – rapidly spinning dead stars – are helping the SKA Observatory to prepare for science operations.

https://www.skao.int/en/news/651/cosmic-clocks-preparing-skao-early-science

The signal ⤵️ shows 100 pulses from the Vela pulsar and has been sonified 🔊

#skao #vela #pulsar #velapulsar #pulsars #SKAlow #SKA #radioastronomy #physics #astronomy #astrophysics #astrodon #news #clocks #science #video

We had a great week full of science in Görlitz. Many thanks to @skao , DZA, and all the other organizers! 🙌

You can get a glimpse of the fantastic atmosphere at the event in our short video.

#skao #RadioAstronomy #Radioastronomie #science #wissenschaft #conference #konferenz #görlitz

🌟 From June 16 to 20, 2025, Görlitz will become the 𝐡𝐨𝐭𝐬𝐩𝐨𝐭 𝐨𝐟 𝐢𝐧𝐭𝐞𝐫𝐧𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐫𝐚𝐝𝐢𝐨 𝐚𝐬𝐭𝐫𝐨𝐧𝐨𝐦𝐲! 🌟

At the @skao Science Meeting, over 500 researchers from around the world will come together to advance the world’s largest radio telescope, the Square Kilometre Array Observatory.

Germany is strongly represented as a founding member through the MPIfR and the DZA. The conference will highlight exciting topics such as cosmology, galaxy evolution, gravitational waves, and the search for life beyond Earth.

👩‍🔬👨‍🔬 Over 200 scientific talks, international experts, and a public program featuring a lecture by Prof. Dr. Michael Kramer on June 17.

We are very much looking forward to the conference and a successful collaboration!

#SKAO #radioastronomy #astrophysics #Görlitz2025 #MPIfR #DZA #Science

🥁 We start the day with great news:

"The first image from the international SKA Observatory’s telescope in Australia, SKA-Low, has been released today – a significant milestone in its quest to reveal an unparalleled view of our Universe."

👉 https://www.skao.int/en/news/621/ska-low-first-glimpse-universe

#ska #skao #australia #skalow #radioastronomy

🌍🔭 A Telescope Across Three Countries? Yes! 🔭🌍

The Square Kilometre Array Observatory (SKAO) is revolutionizing radio astronomy with a telescope spanning three countries! 🚀🔬

Learn how this ambitious project is unlocking the mysteries of the universe:
🔗 https://www.skao.int/en/about-us/skao

#Astronomy #SKAO #SpaceScience #RadioAstronomy #Innovation #BigScience

Image source: SKAO website

Si te interesa la ingenería de sistemas y/o la astronomía, puede que te interese asistir al webinar que voy a dar en unos 5 minutos sobre desafíos de ingeniería de sistemas por el Wideband Sensitivity Upgrade (Actualización de Sensibilidad de Banda Ancha).

Zoom: https://incose-org.zoom.us/j/85248093758?pwd=KbAEckd3I9Hi95omkAcV62TaBcvFO0.1

Detalles: https://www.linkedin.com/events/7284692059783868416/attendees/

#ALMA #AtacamaLargeMillimeterSubmillimeterArray #AtacamaLargeMillimeterArray #IngenieríaDeSistemas #SystemEngineering #INCOSE #INCOSELatAm #IngenieriaDeSistemas #IngenieriaSistemas #astronomía #astronomy #radioastronomy #WSU #WidebandSensitivityUpgrade

Y el vídeo en PeerTube:

https://videos.trom.tf/videos/watch/0dd5aee8-a163-4636-a150-c6e6bb52e8e8

#ALMA #AtacamaLargeMillimeterSubmillimeterArray #AtacamaLargeMillimeterArray #WidebandSensitivityUpgrade #WSU #Array2024 #USACH #RadioAstronomy #BigData

LOOK!

These odd plots represent the first data from the SKA-low telescope working as an interferometer.

Data comes from two stations (each with 256 antennas) where the signal is correlated. That little kink is the radio galaxy Centaurus A.

SKA is starting to come online!

SKA-low features these odd-looking antennas that resemble Christmas trees. 256 of them sit in a ‘station’ which acts as a single unit. Once construction is complete (end of decade) there will be 512 stations separated by distance creating a large virtual telescope.

SKA-low is the Australian side of the project and will feature over 131,000 antennas to cover the low-frequency bands.

This will complement SKA-mid, located in South Africa which will have an interferometer made of dish antennas and cove a huge bandwidth up to 15 GHz.

📸 SKAO

#RadioAstronomy #Astrodon #SKAO #Observatories #Telescopes

This book has triggered some memories on the early involvement of Spain in the SKA development which I documented on LinkedIn, but I will write a thread here about them.

1/11

#SKAO #SKA #SquareKilometreArray #SquareKilometreArrayOrganisation #SquareKilometreArrayObservatory #SPDO #ISPO #RadioAstronomy #HistoryBook #LargeScaleResearchInfrastructures #Spain #SpanishScienceIndustry #ScienceIndustry
https://astrodon.social/@juandesant/112696949499330270

Great book (PDF & EPUB) if you have any interest in the SKA's early history. Really good job from Richard Schilizzi, Ron Ekers, Peter Dewdney, and Phil Crosby on compiling a lot of evidence on the journey to establish the SKA, with what went well, and not so well, with lots of detail and notes.

https://link.springer.com/book/10.1007/978-3-031-51374-9

#SKAO #SKA #SquareKilometreArray #SquareKilometreArrayOrganisation #SquareKilometreArrayObservatory #SPDO #ISPO #RadioAstronomy #HistoryBook #LargeScaleResearchInfrastructures

"A bit of me feels that the horse has bolted and we're in catch-up mode at this point."

But: "There's a social good element to what the satellite operators are doing and you've got to balance that against possible impacts to things like radio astronomy."

https://www.abc.net.au/news/2024-05-27/square-kilometre-array-wa-to-face-satellite-noise-interference/103830954

#Space #Satellites #Astronomy #RadioAstronomy #SKAO

The first #MeerKAT+ antenna was today handed over in a festive ceremony in the Karoo region in South Africa. 🥳

This marks another important step towards the Square Kilometre Array Observatory (#SKAO), as the 14 antennas of the MeerKAT extension will be integrated into the SKAO in 2027.

👉 https://www.mpifr-bonn.mpg.de/pressreleases/2024/5

#radioastronomy #radiotelescope

What is a SKAMPI doing in the Karoo semi-desert in South Africa?

Unique scientific research! 👍

The SKA-MPIfR telescope (SKAMPI) is a prototype dish for the SKA-Mid telescope currently under construction in South Africa.

Take a look at the stunning results of the "First Light" observations of the Vela pulsar: https://www.mpifr-bonn.mpg.de/pressreleases/2024/3

#radioastronomy #SKAO #pulsar #firstlight #telescope