#shortwave signals

[sohannabarberaesque]

Reputedly Mildew Wolf's kind of motorhome, let alone the kind Honey and Sis would want to have a "pop-up" surprise shortwave worldcasting station emenating from (and then again, you wonder how stainless steel bodies characterising Airstream and Holiday Rambler camper trailers would impact upon shortwave worldcasting signals as much as atmospherics).

[sl33py-g4m3r]

analog or digital?

It's far too late to ever go back to analog television broadcasting; but just a quick question~~

which is better?

iirc and it's been like a decade or so since the swap to digital in the US at least; that analog might actually have been better.

cause, if there was a thunderstorm, you could still perhaps get sound even if the picture was static... or when the picture was messed up. it didn't glitch and hang on a syllable or something and loop indefinitely until the tv was turned off and back on again. or cut out to no signal entirely.

unfortunately that's all I remember from the days before the switch to digital tv channel broadcasting.

I'm of the (possibly? idk) naive belief that analog was superior to digital in some cases, this is one of them.

how is digital better than analog in this case or vice versa? curious whether digital tv broadcasts, or analog ones were/are better, and why.

probably a product of a bygone era at this point; but I miss the days of analog tv~~

I'm imagining people moving their antennas around trying to get stations far away if the weather permitted it, like you can with shortwave radio broadcasts.

[ham-and-beans]

"Romania International Interval Signal"

24-02-16 / 19:29 UTC / 5955 kHz AM

[iamnowhere-if]

I am Now Here // To Nowhere

I am Now Here // To Nowhere is an in-development Sugarcube Twine Interactive Fiction written for the Smoochie Jam 2024.

You are a cowboy in the post-apocalypse, tasked with the important job to deliver the mail across the ice-sheets and endless polar desert of a frozen earth. Following the shortwave radio signals of forgotten towns, and the occasional helpful traveler, you and your partner navigate this wasteland for a hope of humanity at dawn.

Features + Semi-Customizable Player Character; appearance, pronouns, gender, sexuality. Play as a middle-aged person navigating a world you no longer recognise. + A singular, established romantic relationship with your pardner. + A focus on building platonic and professional relationships with others; finding that balance between work and self in a world that no longer has the luxury to separate each. + Name your horse.

Characters

Intros

Davi | Your partner in life and in the wasteland amab . they/he 47 . 5'8" | 173cm

Cinta | A familiar scavenger afab . she/her 52 . 5'9" | 178cm

[twlvie]

back by popular demand: THE POLYGLOT, some sort of thang that loves words and making new ones. imagine Esperanto 2.

abilities:

hopping about like the pixar lamp

communicating via shortwave radio signals, slowly spelling things out in the spectrogram in various characters

eats whatever words you speak to it and replaces them in your mind with its own New™ Improved™ words. you will never remember or understand the old ones again. sorry! well . it's all for the Best. don't you Love your New™ Improved™ THE POLYGLOT™ language?

[jgfiles]

Hello, I spotted this picture on your profile. I'm curious how long the D Agency has been open? Who is responsible for teaching there? Did Yuuki and Jitsui die because they shared Miyoshi's position? Thank you!

I think...

my timeline for "Joker Game" might help you.

Anyway D Agency was founded in 1937, autumn. Around that same time Sakuma was ordered to become the liaison but, before going there he had to wait for his hair to grow longer so he went there in 1938 April and witnessed the exams of the various spies until only eight of them remained.

Well, according to the novels from which the anime is based:

"The training in the D-Agency was full of diversity.

For example, the students had been instructed on using explosives and wireless signals, the operation of automobiles and planes, as well as learning various languages and dialects. They had received lectures from professors of renowned universities on organizational theories, religious studies and international political theories. Lessons on medical science, pharmacy, psychology, physics, chemistry and biology were also given.  

Abstruse discussions about ideologists and strategists such as Sun Tzu, Kant, Hegel, Clausewitz, Hobbes, and more that Sakuma hadn’t even heard of, often happened between students. On the other hand, professional thieves and safe-crackers had been brought out of prison to instruct the trainees on the techniques and methods. Aside from being taught on how to pick a lock using a single wire, the students also received lessons on how to secretly switch items by sleight of hand as a magician would, dance and billiards techniques. Kabuki actresses had been hired to teach the students the art of disguise, while professional gigolos demonstrated how to seduce women.

All students had been required to swim in cold water while clothed, then travel to a location far away without sleep, and use complex ciphers, memorized only a day beforehand, fluently and naturally as the languages they usually speak.

The D-Agency had even trained them to be able to disassemble shortwave radios in complete darkness, and put them back together so that they were once again functional, relying solely on their fingertips. The students had also been ordered to seamlessly open envelopes with a bamboo stick, and instantly memorize words which had been written backwards and reflected in a mirror. Letters containing orders, no matter how complicated they are, were to be destroyed on the spot after they had been read; the students had also been trained to recover destroyed letters." [Joker Game Bool 1: "Joker Game" translation courtesy of @imayooshi]

Also Yuuki himself taught to the students as well.

The image you saw is an art from Shiro Miwa, "joker Game" character designer. It reflects his own headcanon about the future of the characters from "Joker Game".

Shiro Miwa said he assumed that, after the war Yuuki forced Kaminaga to take over the organization and disappeared with Jitsui and that Kaminaga kept on receiving instruction from an unknown address. He also said he picked up 1960 because it was a time of major changes in world affairs including the Vietnam war and Kennedy assassination.

Amari apparently ended up on a wheelchair and is being taken care of by Emma.

According to Shiro Miwa the one I speculated is Miyoshi (at the time I didn't have the book with the illustration and so I couldn't read what he wrote as that image was shared by @i-dedicate-this-kill-to-the-fans here) is someone else who got recruited by Yuuki while he was in hiding.

However this is just Shiro Miwa's headcanon. Due to lack of material many fans tend to accept it as canon but it's not really canon and if the series were to be continued in the future things could go differently (especially since Odagiri and, likely, Sakuma were both likely set up to die in war).

I hope this helps! Thanks for your ask!

[fuzzkaizer]

Goya - Panther

1967 Goya/Arbiter catalog and related brands

"It sounds like a trash can full of broken glass rolling down a set of concrete stairs. ... In other words, it sounds like you're sending your signal through a shortwave radio with bad reception."

cred: facebook.com/Ed Skymall

[vvatchword]

BioShock's Service Radio :)

So every now and then a girl asks: "Is the shortwave radio from BioShock based on a real model or is it just some kind of creative design"

Creative Director Ken Levine is a perfectionist, so sometimes it's worth it to ask questions like this. I'm writing a fanfic and I have to write about Jack manipulating the thing, so why not do it right?

So I went to my most technologically-minded friend and asked questions.

Dan What in-game radio are you referring to?

Watchword The shortwave radio you pick up at the very beginning of BioShock 1

Dan ? I can see why there are no real life analogues (Note: I was looking up shortwave radios on Ebay) it's more of a portable tape player than radio with the reels and reader heads out in the open, though I think in that era of technology, you would have either or in the real world, but not both.

Dan But then the antenna implies that it is capable of receiving radio signals And the name is service radio We'll just say it's one of those fictional advanced inventions the in-game universe has I think it's safe to say that you're not meant to scrutinize 100% of the production, looking for meaning and purpose in every detail, model, and texture There are certain things that are simply in the world to be there. Next thing you know, there's a 45-minute youtube video essay about the deeper meaning behind the Circus of Values (edited) what did Ken Levine mean by this

(Fuck you, dan)

(We last argued about how much story you could accurately ascertain from Elden Ring. He thinks people just make shit up. Anyway)

Dan I'm guessing there would need to be two buttons for the tape player, one to play and one to rewind Other than that, you would just need two dials, one for volume and one for radio frequency The model has 4 buttons and one dial, but it could still work 1 - power 2 - play 3 - rewind 4 - fast forward dial - frequency Maybe there is no volume control I don't know what the small button between the top reel and bulb is, but could be a dial as well

Watchword oh my god thank you so fucking much Do you think that might just be a screw or something like to hold the whole chassis together … or that's the button you press to broadcast since the stupid little thing is apparently a dictaphone on top of everything

Dan Broadcast, no There's no possible way that it is also a two-way radio But if it can also record audio, then it might be a record button, or one of the four up there is

Watchword Dude, bless u. In other words… THERE IS NO WAY Jack replies to Fontaine at any point. Everybody just talks at you and this is almost certainly BY DESIGN I feel like we've stumbled onto a design choice that expands the theme of the game that much more Why are you so certain it can't broadcast? Size? Necessary components?

Dan pretty much two-way radios of that era are huge

Watchword That tracks. The ones I've seen are like… in briefcases I saw one that was the size of a goddamn desk (but it was from the 40s)

Dan Voiceless protagonist by necessity

Watchword Explains why you can play all the audio diaries too. The dictaphones are symbols, you play the tape on your receiver Damn

[spacetimewithstuartgary]

Sentinel-2C joins the Copernicus family in orbit

Sentinel-2C launched into orbit on 5 September at 03:50 CEST (4 September 22:50 local time) and separated from the Vega rocket at approximately 04:48 CEST.

Around 14 minutes later, at 05:02 CEST, ESA received the all-important signal indicating that the satellite was safely in orbit.

Constantin Mavrocordatos, Sentinel-2 Project Manager at ESA, said, "I am overjoyed with the successful launch of Sentinel-2C, a milestone that would not have been possible without the dedication and hard work of our incredible team. Together, we've taken another significant step forward in advancing Earth observation and supporting critical applications that benefit our planet."

ESA's Director of Earth Observation Programmes, Simonetta Cheli, commented, "We are thrilled to celebrate the successful launch of Sentinel-2C, a new milestone in the well-established collaboration between ESA and the European Commission.

"This mission further confirms the role of Copernicus as a leading program to contribute to climate change and environmental challenges worldwide, but also ensures the continuity of vital data to support agriculture, forestry, maritime monitoring, and for many other sectors. Together, we are solidifying Europe's commitment to a sustainable future, empowering decision-makers with the tools they need to protect our planet."

ESA's Director of Space Transportation Toni Tolker-Nielsen, said, "Europe's Vega rocket launched the previous two Sentinel-2 satellites in 2015 and 2017, so this launch was a fitting farewell to a very successful rocket.

"Teams are already preparing for the next Vega launch, the upgraded Vega-C by the end of the year. Today's liftoff was Vega's 20th successful launch in its 12 years of service, farewell Vega, long live Vega-C!"

About Copernicus Sentinel-2

The Copernicus Sentinel-2 mission provides high-resolution optical imagery for a wide range of applications including land, water and atmospheric monitoring. The mission is based on a constellation of two identical satellites flying in the same orbit but 180° apart: Sentinel-2A and Sentinel-2B. Together, they cover all of Earth's land and coastal waters every five days.

With Sentinel-2C now in orbit, it will soon replace its predecessor, Sentinel-2A, following a brief period of tandem observations. Sentinel-2D will eventually take over from Sentinel-2B. Later, it is planned that the Sentinel-2 Next Generation mission will then ensure data continuity beyond 2035.

The current Sentinel-2 satellites each carry a high-resolution multispectral imager that generates optical images in the visible, near-infrared and shortwave-infrared part of the electromagnetic spectrum. From their altitude of 786 km, they provide continuous imagery in 13 spectral bands with resolutions of 10 m, 20 m and 60 m, with a large swath width of 290 km.

Sentinel-2 data are currently being used for a broad range of applications, including agriculture, water quality monitoring, natural disaster management, including wildfires, volcanic eruptions and floods. The mission has surpassed its original expectations, for example, by demonstrating its ability in detecting methane emissions.

For agriculture, the mission helps to monitor crop health, predict yields and enable precision farming. Images are used to detect crop type, and to determine biophysical variables such as leaf area index, leaf chlorophyll content and leaf water content to monitor plant growth and health.

The Sentinel-2 mission is the result of close collaboration between ESA, the European Commission, industry, service providers and data users.

ESA develops, builds, launches and operates the satellites in orbit, and downloads the scientific data.

Sentinel-2 data are freely available via the Copernicus Data Space Ecosystem, providing instant access to a wide range of data from both the Copernicus Sentinel missions and the Copernicus Contributing Missions.

The Sentinel-2 satellites have been designed and built by a consortium of around 60 companies led by Airbus Defence and Space.

The Copernicus component of the EU Space Program is supported by a set of dedicated satellites, known as the Sentinel family, and contributing missions (existing commercial and public satellites). Looking to the future, six Sentinel Expansion missions and four Next Generation Sentinels are being developed to address EU policy and gaps in Copernicus user needs.

About Vega

Sentinel-2C was the last liftoff for the Vega rocket. After 12 years of service—this was the final flight—the original Vega is being retired to make way for an upgraded Vega-C.

Other missions launched by the small and nimble rocket over its lifetime are flagship ESA missions such as technology demonstrator Proba-V, wind monitoring satellite Aeolus, the reentry vehicle IXV and LISA Pathfinder, a forerunner to LISA that will measure gravitational waves in space.

The Vega line ensures that Europe has a versatile, independent access to space, complementing the Ariane family of rockets to launch satellites to any orbit—continuing with Vega-C and the heavy-lift rocket Ariane 6.

IMAGE: Sentinel-2C was the last liftoff for the Vega rocket. After 12 years of service, Vega is being retired to make way for the upgraded Vega-C rocket. Credit: ESA–S. Corvaja

[flightoftheconcorde]

I need to be in charge of an old radio station that is beyond repair, with my signal broadcasting unfalteringly for years and years, to be heard by amateurs and experts alike on the shortwave band.

I want to send out sounds, numbers, music, a grainy low quality voice repeating some same 5 words, anything that'll tell people that there is someone- something still manning the station, sending messages for people to decode...

... Oh to have my weak low quality signal picked up by some attentive listener pondering why? what? who? and how? To have them tune back in every night hoping to hear some new cryptic string of digits...

[twocommunications]

Initially, it was thought that long-distance transmissions required very long waves, typically generated electromechanically. However, the potential of short waves was soon recognized, and these could be produced using the newly developed thermionic valves.

Paul F. Godley was a radio pioneer who gained fame for his successful transatlantic shortwave tests in the 1920s. Godley collaborated with notable figures like Guglielmo Marconi, Lee De Forest, Edwin H. Armstrong, and Michael Pupin, contributing to advancements in radio and wireless technology. Godley played a key role in early research on regenerative vacuum tube circuits.

In 1921 the American Radio Relay League sent him to Scotland to test transatlantic shortwave signals, where he successfully received a radio message.

Paul Godley later ran a radio engineering consulting firm under his name in Upper Montclair, New York, from 1926 until his retirement in 1963. In 1967, he was awarded the De Forest Audion Award by the Veteran Wireless Operators Association in recognition of his six decades of contributions to electronic research and development. Paul F. Godley passed away in 1973.

[sohannabarberaesque]

Thus did Honey and Sis explain to their legions(?) of shortwave listeners some tweaks to their antenna to maximise signal reach for so little wattage

[As per usual, such is from their travelling "pop-up" shortwave station in a rebuilt GMC motorhome of mid-1970's vintage, broadcasting more or less at unusual or unexpected times. This such occurs as their opening theme, Queen's "Radio Ga-Ga," winds down as per usual] HONEY, with a bit of pride: I suppose some of you regular shortwave listeners cannot help but notice that our signal is probably coming in much clearer and more efficiently compared with previously. SIS: And I assume that goes as well for Gilly-Gilly Ossenfeffer Katzenellenbogen-by-the-Sea, Mixingham-on-Sea ... and we can't forget our Welsh friends in Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch, as long as we're worldcasting over some coffee of blended Puerto Rican and Hawai'ian origins! But then again, I think you'll find the signal much improved with no back-door jacking up of the power. HONEY: Which can be explained by a few modulation tweaks to the antenna, as devised by some close friends of ours to maximise the quality and reach while still worldcasting at 50 watts irradiated! SIS: I just hope we're not sounding like Snagglepuss there with our twisting the language around in this our announcing signal quality improvements ... but at any rate, a QSL to us indicating how our new improved signal came out in your neck of the woods would be most welcome....

[allthebrazilianpolitics]

Public radio reaches power-deprived areas in Brazil’s South

Battery-operated radios re-emerge in flood-stricken Rio Grande do Sul

A device many believe to be outdated has regained its vital role amid the floods that have wreaked havoc on hundreds of cities in Rio Grande do Sul, South Brazil. Following power outages and the loss of internet signals, a large portion of the state’s population have once again opened their ears to the information transmitted by the old battery-operated radio.

Aware of the potential of this crucial tool for communications, Brazil’s public broadcasting company EBC has pointed one of its shortwave transmitters at the region. As has long been the case for North Brazil, EBC has given people a chance to reunite and gain access to basic services in times of dire need since late April.

A resident of the city of Canoas, 62-year-old janitor Belmiro Prates is one of the victims of the floods. The entrance to the building where he lives was invaded by waters, leaving his car completely submerged. He was rescued on Monday 13 by a Civil Defense team. Since then, with no access to power, telephones, or the internet, Prates has struggled to stay informed and to notify his loved ones of his situation.

The trusty old devices, he believes, have the power to overcome barriers for people with no TV or electricity, and have become the main form of communication. “I only managed to keep up to date here thanks to the radio and the programs on Rádio Nacional station. I have acquaintances in Amazonas [state], and it was thanks to the interview I gave that I was able to send a message to everyone saying I’m fine,” he told Agência Brasil.

Continue reading.

[ham-and-beans]

"Shortwave Service Interval Signal"

24-01-01 / 23:08 UTC / 3985 kHz AM

[spacenutspod]

5 min read NASA-Funded Science Projects Tuning In to ‘Eclipse Radio’ On April 8, 2024, a total solar eclipse will cross parts of the United States. For millions of people along the path of totality, where the Moon will completely cover the Sun, it may feel like an eerie daytime darkness has descended as temperatures drop and wind patterns change. But these changes are mild compared to what happens some 100 to 400 miles above our heads in an electrically conductive layer of our atmosphere known as the ionosphere, where the “false night” of an eclipse is amplified a hundredfold. Three NASA-funded experiments will investigate the eclipse’s effects on the ionosphere through the power of radio, a technology well suited to studying this enigmatic layer of our atmosphere.  The Aug. 21, 2017, total solar eclipse douses Umatilla National Forest in shadow, darkening the sky and rimming the horizon with a 360 degree sunset. NASA/Mara Johnson-Groh Whether you’ve heard of the ionosphere or not, you’ve likely taken advantage of its existence. This electric blanket of particles is critical for long-distance AM and shortwave radio. Radio operators aim their transmitters into the sky, “bouncing” signals off this layer and around the curvature of Earth to extend their broadcast by hundreds or even thousands of miles. The ionosphere is sustained by our Sun. The Sun’s rays separate negatively charged electrons from atoms, creating the positively charged ions that the ionosphere is named for. When night falls, over 60 miles of the ionosphere disappears as ions and electrons recombine into neutral atoms. Come dawn, the electrons are freed again and the ionosphere swells in the Sun’s illumination – a daily cycle of “breathing” in and out at a global scale. A total solar eclipse is a scientific goldmine – a rare chance to observe a natural experiment in action. On April 8 the three NASA-funded projects listed below are among those “tuning in” to the changes wrought by a blotted-out Sun. SuperDARN The Super Dual Auroral Radar Network, or SuperDARN, is a collection of radars located at sites around the world. They bounce radio waves off of the ionosphere and analyze the returning signal. Their data reveals changes in the ionosphere’s density, temperature, and location (i.e. movement). The 2024 eclipse will pass over three U.S.-based SuperDARN radars. A team of scientists led by Bharat Kunduri, a professor at the Virginia Polytechnic Institute and State University, have been busy preparing for it. An aerial view of a SuperDARN radar site outside Hays, Kansas. Credit: Fort Hays State University “The changes in solar radiation that occur during a total solar eclipse can result in a ’thinning’ of the ionosphere,” Kunduri said. “During the eclipse, SuperDARN will operate in special modes designed to monitor the changes in the ionosphere at finer spatiotemporal scales.” Kunduri’s team will compare SuperDARN’s measurements to predictions from computer models to answer questions about how the ionosphere responds to a solar eclipse. HamSCI While some experiments rely on massive radio telescopes, others depend more on people power. The Ham Radio Science Citizen Investigation, or HamSCI, is a NASA citizen science project that involves amateur or “ham” radio operators. On April 8, ham radio operators across the country will attempt to send and receive signals to one another before, during, and after the eclipse. Led by Nathaniel Frissell, a professor of Physics and Engineering at the University of Scranton in Pennsylvania, HamSCI participants will share their radio data to catalog how the sudden loss of sunlight during totality affects their radio signals. Students work with Dr. Frissell in the ham radio lab on campus. Simal Sami ’24 (in orange), who is part of Scranton’s Magis Honors Program in STEM; Dr. Frissell; and Veronica Romanek ’23, a physics major. Photo by Byron Maldonado courtesy of The University of Scranton This experiment follows similar efforts completed during the 2017 total solar eclipse and the 2023 annular eclipse. “During the 2017 eclipse, we found that the ionosphere behaved very similar to nighttime,” Frissell said. Radio signals traveled farther, and frequencies that typically work best at night became usable. Frissell hopes to continue the comparison between eclipses and the day/night cycle, assessing how widespread the changes in the ionosphere are and comparing the results to computer models. RadioJOVE Some radio signals don’t bounce off of the ionosphere – instead, they pass right through it. Our Sun is constantly roiling with magnetic eruptions, some of which create radio bursts. These long-wavelength bursts of energy can be detected by radio receivers on Earth. But first they must pass through the ionosphere, whose ever-changing characteristics affect whether and how these signals make it to the receiver. This radio image of the Sun was made with a radio telescope by astronomer Stephen White (University of Maryland). The radio emission was detected with the Very Large Array radio telescope at a wavelength of 4.6 GHz. The image shows bright regions (red and yellow) of million-degree gas above sunspots. Credit: Courtesy NRAO / AUI / NSF The RadioJOVE project is a team of citizen scientists dedicated to documenting radio signals from space, especially Jupiter. During the total solar eclipse, RadioJOVE participants will focus on the Sun. Using radio antenna kits they set up themselves, they’ll record solar radio bursts before, during, and after the eclipse. During the 2017 eclipse, some participants recorded a reduced intensity of solar radio bursts. But more observations are needed to draw firm conclusions. “With better training and more observers, we’ll get better coverage to further study radio propagation through the ionosphere,” said Chuck Higgins, a professor at Middle Tennessee State University and founding member of RadioJOVE. “We hope to continue longer-term observations, through the Heliophysics Big Year and beyond.” Find out more about the April 8, 2024, solar eclipse on NASA’s eclipse page. By Miles HatfieldNASA’s Goddard Space Flight Center, Greenbelt, Md.

[skywavelinux]

Skywave Linux v5 is Now on Debian Sid!

Enjoy shortwave radio and overseas broadcasts, no matter where you are. Skywave Linux brings the signals to you. Broadcasting, amateur radio, maritime, and military signals are available at your fingertips.

Skywave Linux is a free and live computing environment you boot from a flash drive on your PC. Start it up, pick a radio server somewhere in the world, and tune in some stations.

Skywave Linux brings you the signals, whether or not you have a big outdoor antenna or can afford an expensive communications receiver. Hundreds and hundreds of volunteer operated radio servers are on the internet, which let you tune the airwaves and pick up broadcasts in excellent locations and on high performance equipment.

If you are into FT-8, PSK-31, JT-65, or other digimodes, you can decode the signals in Skywave Linux. It also has tools for decoding weather satellites, ACARS, and ADS-B signals.

Not only is Skywave Linux a prime system for software defined radio, but also for programming and coding. It has the Neovim editor and support for several programming languages: Python, Lua, Go, and Javascript. It is a great system for Web developers.

Debian Sid is now the base operating system which Skywave Linux builds upon. It is debloated, tuned, and tweaked for speed, so that you get the best possible computing performance. It works nicely on old laptops; it is super fast on a multi core, high spec PC.

For shortwave listening, weather satellite decoding, or airband monitoring, Skywave Linux is the system you want!