07/22/2017 08:00 PM
Students Experience the Thrill of Ham Operation:
It was a thrilling experience for 70-odd students from the Electronics and Communications departments in Potti Sriramulu College of Engineering and Technology. They carefully observed as a group of Ham operators made swift arrangements to capture the signals from their college premises to help them see pictures transmitted by members of Amateur Radio on the International Space Station (ARISS), to mark its 20th anniversary. Ham operators A. Ramesh Babu (VU2RDM), Prabhu Das Ankala (VU2DOS) from Hyderabad, Subba Reddy (VU3OUA), B.Y. Prasad (VU3XOH) and B. Umakanth (VU3UBU) took the lead in conducting the event. The college Principal K. Nageswara Rao, faculty Ranga Rao and others were present. The Hams made a special three-element Yagi VHF uni-directional antenna and fixed it on a tripod so it could work from all directions with the orbiting International Space Station (ISS) at latitude 48.330, longitude 114.210, altitude 406.66 KM and speed of 27624 KMPH. This space station takes about three hours to complete one cycle around the globe. The Hams demonstrated how fast the ISS moves in the orbit and astronauts communicating to the ground station at the National Aeronautics and Space Administration (NASA) through Ham Radio. The Ham operators also monitored live activity of the ISS.
07/22/2017 08:00 PM
Joining the 'CERT' Team:
POINT PLEASANT -- Mason County 911 Director Dennis Zimmerman has achieved a a goal set forth when he was first hired -- establish a competent and ready CERT team for Mason County. The Community Emergency Response Team (CERT) is a group formed of volunteer civilians with training to assist the public in times of emergency. Functioning as a part of the county Emergency Management Agency (EMA), CERT is a group that continues training while being ready to assist existing agencies in times of disaster. They also coordinate with amateur radio operators, also called HAM radio, for efficient communications. In a disaster situation radio space is often tied up with law enforcement and emergency medical services. Therefore non-emergency communications like CERT use amateur radio operators to communicate without tying up valuable radio time.
07/21/2017 08:13 PM
Old Weather Radio Technology Still Most Trusted for Tracking Monsoons:
Weather Radio is the steady stream of rough messages broadcast 24/7 and picked up by your favorite radio stations when the weather turns. They're a nearly daily occurrence in Arizona right now, warning of flash flooding in Douglas, winds in Tucson, and severe storms just outside Phoenix. This recent broadcast in Nogales warned people to move to the first floor of whatever building they were in. And if it sounds a little garbled, there's a reason for that. Dan Leins is a meteorologist with the National Weather Service in Tucson. Scientist and meteorologist Dan Leins demonstrates the NOAA Weather Radio at the National Weather Service in Tucson. "They got their start with a person who would go live on the radio when they had active weather going on. They would either speak live or do recordings on tape. And that would play back over and over and over again. That would run 24/7 if there was active weather in the middle of the night," Leins saidIt's a technology from the last century. In fact, before Twitter, the National Oceanic and Atmospheric Administration Radio All Hazards -- or, Weather Radio -- was intended as a way for the president to reach the country. "If there's a natural disaster, if there was a nuclear disaster, the system was designed to pick up broadcasts like that and redistribute them nationally instantly. That was one of the main purposes that NOAA weather radio all hazards was deployed."
07/21/2017 08:12 PM
Amateur Radio Clubs Monitor Weather, Events:
(TNS) -- Specialized technology and code names may sound like elements of a spy movie; but they are also tools used by members of amateur radio clubs. "We're the most anonymous organization you're going to find," said McPherson Amateur Radio Club member Richard Johnson. "Most people have no idea what we do or how we do it." The Newton Amateur Radio Club and the McPherson Amateur Radio Club support numerous events by providing communications services and serving as weather spotters. "We are basically two clubs operating jointly," said Russell Groves, president of the McPherson Amateur Radio Club. "They're separate entities with separate charters, but we do just about everything together." The majority of the events their members, who are also known as hams, work are marathons or bike rides that can cover more than 50 miles of roads or trails. As participants pass by stations, the radio operators note if anyone is experiencing health problems, is being chased by a dog, has an emergency call coming in or needs to drop out and arrange transportation from the middle of the course. "We try to be very efficient in the information we're passing. It isn't a lot of chit-chat, it's just information as needed to be conveyed to the right people," Groves said. "We keep track of the riders and the runners so we know where everybody is on the course. If someone doesn't make it from one stop to another, we're keeping track of that, too." The system also ensures riders or runners who get lost are found and that the event does not end until everyone is accounted for.
07/21/2017 08:11 PM
Amateur Radio Association Keeping 'The Other Wireless' Alive:
WASILLA -- The Matanuska Amateur Radio Association is a general interest amateur radio club with approximately 100 members. You may not see them, but if you have a scanner, chances are you've heard them. According to MARA secretary Tabitha Sherman, the group is comprised of folks from every walk of life with at least one thing in common, the love of amateur, or ham radio. Group officers said MARA members are involved in every aspect of amateur radio. The organization makes a special effort to participate in providing communications support for public service events, field days, marathons, sled dog and snow machine races -- local and statewide, avalanche rescues, and wildland fires.
07/21/2017 08:11 PM
Is Our Sun Slowing Down in Its Middle Age?
The Sun has changed its figure, researchers say, and might keep it that way. The structure of the Sun's surface, where sunspots live, appears to have changed markedly 23 years ago. That's when solar magnetic activity might have started slowing down, Rachel Howe (University of Birmingham, UK, and Aarhaus University, Denmark) and collaborators speculate in paper to appear in the Monthly Notices of the Royal Astronomical Society (full text here). Such a structural change might help explain the Sun's mysteriously weak cycles in recent years.
07/21/2017 06:59 PM
Foundations of Amateur Radio -- #111:
For the most part of my Amateur Radio life
I've been an active contester. I have spoken
about why I love contesting and why I think
it's an important aspect of this amazing
hobby. Today I want to talk about how
contests are run, specifically how complaints
are handled and how we could improve.
07/21/2017 11:17 AM
Propagation Forecast Bulletin #29 de K7RA:
Average daily sunspot number this week declined just 1.7 to 26.6,
even though there were two days in the reporting week with no
sunspots, July 18 and 19. The blank sun condition continued at
least one more day on Thursday, July 20 which lands it on the first
day of the next reporting week, July 20 to 26.
07/20/2017 09:13 PM
Caboolture Radio Club to Open Up the Airwaves with its Annual Ham Fest:
CABOOLTURE Radio Club is tuning up for its annual Ham Fest. The event, on Saturday, July 22, allows visitors to buy second-hand electronic equipment. Last year more than 100 people showed up. It is one of the activities the 45-strong club membership does from its base in Smiths Rd, Caboolture. Club secretary John Arnfield said the club helped train those working on an Amateur Radio Foundation Licence or upgrading to a Standard or Advanced licence.
07/20/2017 09:13 PM
When the zombie apocalypse hits, what will you do? Will you scramble to arm yourself, or collect supplies and hunker down in a remote location? What about finding other survivors? How will you reach them? A common characteristic of zombie invasions is the destruction and total failure of communication systems: cell phones, land lines, Wi-Fi, everything. That's where the Montrose Amateur Radio Club comes in. In case of any emergency (undead or otherwise), the club is capable of operating outside the power grid, making it the only plausible communication system this side of messenger pigeons. "That certainly is true. Here in Montrose County we cooperate with the Montrose County Emergency Management," club member Lew French said. "We are prepared to communicate on behalf of the the county with the state's emergency operations center if the normal lines of communication go down." Amateur radio operators, or hams as they're referred to, can connect with people from all over the world using the shortwave system. "It's a way to communicate through the air without using any infrastructure," French said. "You can operate your radios off of 12 volt batteries."
07/20/2017 09:12 PM
How to Make Sure You Can Communicate with Family During a Disaster:
Keeping everyone connected when disaster strikes in a key component at the Snohomish County Emergency Coordination Center. Without communication, everything else breaks down. "Everything from knowing which roads are open, which ones are jammed or damaged in some way, all of that stuff," said Scott Honaker, communications coordinator for Snohomish County Emergency Management. Emergency responders have all sorts of tools at their disposal to make sure first responders know what's going on, but what about your family? How would you make sure everyone is safe? Amateur radio operators (usually called ham radios) are often the glue that hold communications together in an emergency. There are about 16,000 in Washington state. Ham radios can reach anywhere in the world without the issues linked to phone and cell service.
07/20/2017 09:11 PM
Johnson County Considers Encrypting All Police Radio Traffic:
Citing concerns about privacy and officer safety, Johnson County is considering encrypting all police radio traffic. If the county chooses to encrypt the communications, all law enforcement responses to 911 calls, from routine events like public intoxication or welfare checks to large-scale emergencies like the 2015 Coral Ridge Mall shooting, will be inaccessible to the public in real time. Currently, members of the news media and public with access to a police scanner, the internet or a phone app can listen to law enforcement communications through a live or delayed feed. The change is under consideration by the Joint Emergency Communication Center policy board, made up of Johnson County elected officials and city representatives, and likely wouldn't occur until after the board's next meeting Sept. 23. Before the board makes a decision, it has asked law enforcement to provide a formal rationale detailing the pros and cons of moving to encryption.
07/20/2017 11:52 AM
DX News -- ARRL DX Bulletin #29:
This week's bulletin was made possible with information provided by
KI1U, QRZ DX, the OPDX Bulletin, 425 DX News, The Daily DX, DXNL,
Contest Corral from QST and the ARRL Contest Calendar and WA7BNM web
sites. Thanks to all.
07/20/2017 10:18 AM
Amateur Radio Parity Act is Introduced In US Senate:
The Amateur Radio Parity Act of 2017 was introduced
in the US Senate on July 12, marking another step forward for this
landmark legislation. Senators Roger Wicker (R-MS) and Richard
Blumenthal (D-CT) are the Senate sponsors. The measure will, for the
first time, guarantee all radio amateurs living in deed-restricted
communities governed by a homeowners' association (HOA) or subject to
any private land-use regulations, the right to erect and maintain
effective outdoor antennas at their homes. The Senate bill, S. 1534, is
identical to H.R. 555, which passed the US House of Representatives in
07/20/2017 10:18 AM
Revised FCC Form 605 Will Ask Applicants 'The Felony Question':
A revised FCC Form 605 -- Quick-Form Application for Authorization in
the Ship, Aircraft, Amateur, Restricted and Commercial Operator, and
General Mobile Radio Services -- going into effect in September will
ask all applicants to indicate if they have been convicted of or pled
guilty to a felony. The Communications Act obliges the Commission to
ask "the felony question," as it did on the old Form 610 and still does
on other applications. This action will correct its omission on Form
605, which has existed for years. Applicants' responses and
explanations will be used to determine eligibility to be a Commission
licensee. The FCC told ARRL that it's still deciding whether to issue a
public notice on the change.
07/20/2017 10:17 AM
The Doctor Will See You Now!
"Power Supplies" is the topic of the latest (July 20) episode of the
"ARRL The Doctor is In" podcast.
07/20/2017 10:17 AM
Many Special Events Will Be On the Air to Mark the Total Solar Eclipse:
Radio amateurs from several states will gather in southern Illinois on
August 17-21 to operate special event station W9E leading up to and during the 2017 solar eclipse
on August 21. W9E, which will operate from Marion, Illinois, is one of
several announced solar eclipse special events.
07/20/2017 10:16 AM
New HAARP Research Campaign to Begin in September:
Last February, many HF listeners across North America and elsewhere
were able to copy signals from Alaska's High Frequency Active Auroral
Research Program (HAARP) during its
first scientific research campaign since it was taken over by the
University of Alaska Fairbanks (UAF) Geophysical Institute in 2015. UAF
Space Physics Group Assistant Research Professor Chris Fallen, KL3WX,
told ARRL this week that the next HAARP research campaign, which will
get under way in mid-to-late September, will carry on the experiments
begun during the previous campaigns. This time, though, even more
listeners may be able to hear HAARP.
07/20/2017 10:16 AM
Ham Radio is There, as Honolulu Hosts a Successful 10th Annual 'Geek Meet':
In the middle of Honolulu, with the yacht club, harbor, the ocean, and
the beach, Amateur Radio was there on July 2 for the 10th annual Geek
Meet at Magic Island. Hawaii's Geek Meet
is a fun, casual, family-friendly, grassroots gathering for people who
are curious and have a passion they want to share, including Amateur
Radio. Members of the Emergency Amateur Radio Club of Honolulu and
Pacific Section PIO Stacy Holbrook, KH6OWL, staffed a booth the 2017
07/20/2017 10:15 AM
ARRL Board of Directors to Meet: The ARRL Board of Directors will meet
for its second, regularly scheduled session of the year on Friday, July
21, and Saturday, July 22, in Farmington, Connecticut. ARRL President
Rick Roderick, K5UR, will chair the gathering.
07/18/2017 09:36 PM
Olympia Amateur Radio Society Shares Their Skills:
What is ham radio, really? Have you ever wondered why the truck in front of you has a funny looking license plate and a bunch of weird antennas on the roof? How about seeing a neighbor with all kinds of antennas in the yard and on the roof? Who are these people? We are amateur "ham" radio operators who have chosen a hobby that involves many aspects of communications. We are members of an organization called "OARS" (Olympia Amateur Radio Society). Our club is associated with the Thurston County ARES (Amateur Radio Emergency Service)/RACES (Radio Amateur Civil Emergency Service) organization which assists in emergency communication support at various locations around the county. One of the most important parts of our hobby is emergency communications. If we were to have the disaster that is predicted in the recent Cascadia Rising exercise, it would be utter chaos. Land lines would be out, cell phone networks would be overloaded, internet would be jammed up, police and fire communications could be overloaded. Hams to the rescue! We practice on a regular basis for emergencies such as this. One example of our practice was held on the weekend of June 24 and 25, called "Field Day". It is aptly called this because we set up our stations out in the field and simulate emergency conditions -conditions that would exist if we had just experienced a major earthquake.
07/18/2017 09:36 PM
No Power? Radio to the Rescue!
The all-important Indo-Pak test match is on. The game is in a crucial situation with either side having equal chances to win. This over by R. Ashwin will decide the fate. As he prepares his run-up, you hear a burst outside and before you know it, the power is gone. You are dejected, but your father thinks on his feet and turns on the radio for the updates. Now, you no longer miss out on the action, thanks to the radio. So, who invented this pocket-size entertainment and how did it turn into the radio we all know today? Let's find out. Radio has its roots in the experiments conducted by several scientists in the area of electromagnetic waves and its transmission. Guglielmo Marconi is the person credited with the first transmission of radio waves, however his success relies on the theoritical works of James Clerk Maxwell, Heinrich Hertz and Nikola Tesla. Tesla infact invented a device called the Tesla Coil which converts relatively low-voltage current to high-voltage low current at high frequencies. A form of this coil is still used in television and radio sets today.
07/18/2017 09:35 PM
Excitement in Store for City Hams:
In commemoration of the 20th anniversary of Amateur Radio on the International Space Station (ARISS), it will send pictures relating to its past and present activities which will be transmitted at 2.57 a.m. on July 21. The good news is that the Vijayawada Ham Radio Centre has made special arrangements to capture the signals from the premises of Potti Sriramulu College of Engineering and Technology in city. ARISS lets students worldwide experience the excitement of talking directly with crew members of the International Space Station, inspiring them to pursue interests in careers in science, technology, engineering and maths, and engaging them with radio science technology through amateur radio. A team of Ham Radio experts along with professors and students of the ECE branch will take part in this event on their college premises. Hams from most parts of the world will be able to receive these signals. The pictures will be transmitted in the form of signals which can be converted into pictures using computers, laptops or with simple smart phones through 'PD 120' software freely available on the internet. The 20-year-long history of ARISS will be displayed through a collection of 12 unique images depicting amazing accomplishment of the ARISS over last two decades. Slow Scanning Television (SSTV) signals will be sent to the earth at 145.80 MHz using FM and the event is expected to continue over a two-day period.
07/18/2017 05:26 PM
Longest Ever Study of the Sun Paves the Way for Space Weather Forecasts:
The Sun has been gradually getting hotter for the past seven years, as part of its 11-year solar cycle, according to a new study. For the first time, changes in the temperature of the Sun's hot atmosphere, the corona, have been studied over a timescale of years. "To do this, we analysed Extreme Ultraviolet radiation emitted by the corona, and measured by the Atmospheric Imaging Assembly telescopes aboard the Solar Dynamic Observatory spacecraft," Huw Morgan, from Aberystwyth University and lead author of the study, told WIRED. Studying the solar coronais important for understanding what drives the solar cycle, how this cycle affects light and heat output by the Sun, and how cycle-related changes may affect Earth. This new paper is a step towards being able to predict space weather, likesolar storms, which Morgan expects will be possible within the next couple of decades. "Many important aspects of the Sun, and its connection with the corona and space weather, are poorly understood," Morgan told WIRED. "Yet with each new observing mission, and advances in computer modelling, we are moving closer to understanding this complex system. This study is another small piece of the jigsaw."
07/18/2017 05:26 PM
Why the Navy Sees Morse Code as the Future of Communication:
For centuries, mariners around the globe have used lamps and shutters to beam messages via Morse code from ship to ship. But today, Morse code isn't being learned by every sailor, even though lamp light communication is still being used. So, how we reconcile these two facts? Well, if you're the U.S. Navy you update your lamp light communication systems to encode the modern form of Morse code: texting. In a test recent carried out aboard the USS Stout, the U.S. Navy used a new mechanism it calls the Flashing Light to Text Converter (FLTC) system. During the test, sailors aboard the Stout fired off text messages and the FLTC converted them to their Morse code lamp light signals which were interpreted by the USS Monterey, moored at a dock in Norfolk, Virginia. "The best part of this flashing light converter is how easy it is for sailors to use," said Scott Lowery, a Naval Surface Warfare Center engineer. "It's very intuitive because it mirrors the messaging systems used on iPhones. You just type your message and send it with the push of a button." Though the FLTC is still in its prototype phase, the Office of Naval Research seems to be developing a foolproof system for delivering messages even if radio communications are down. Essentially, the FLTC uses nothing more than a lamps that are either LED-based (they can flicker on and off digitally) or have shutters that are controlled by fast acting stepper motors which open and close mechanically, and a GoPro camera for receiving incoming messages. The neat bit of technology that ties these elements together is an algorithm that can interpret text message sent from a computer, of handheld device, convert them to Morse code, clap out the message via light, and vice versa.
07/17/2017 08:02 PM
VA Tech Expert to Study Solar Eclipse Effects on Radar, Ham Radio, GPS:
BLACKSBURG, Va. -- An expert from Virginia Tech will lead an experiment to study the effects of the upcoming solar eclipse on different communication, safety and transportation systems we use on a normal bases. The eclipse is scheduled for August 21 and is being hailed as a once-in-a-lifetime opportunity. It has been 99 years since a total solar eclipse crossed the United States from the Pacific to the Atlantic -- specifically from Portland, Oregon to Charleston, South Carolina. Greg Earle, a professor of electrical engineering, will head up a team of faculty, staff and students to study the effects of the eclipse on things like over-the-horizon radar, amateur radio, and even GPS. "Radio wave propagation is affected by the electrical part of the atmosphere and during the eclipse, we really have the opportunity to collect data and learn more about the impact of these changes on systems we've come to rely on," said Earle.
07/17/2017 08:01 PM
Amateur Radio Club Makes Contacts from Across the Globe:
When Daniel Simpson and Father David Probst turn on a special device in each of their houses, they can converse with people across the world at the touch of a button. The communications aren't sent through Facebook or email; in fact they're not sent via computers at all. The messages are sent by amateur radio, and connect Simpson and Probst to a network of users all across the globe. "I don't have [the number] for the country, but I know that there are roughly 80 in Baldwin County, and if you do counties that touch Baldwin County, so Putnam, Hancock, Washington, Wilkinson and Jones, it's right at 300 in those counties," said Simpson, vice president of the Milledgeville Amateur Radio Club. "We represent a very large population for a hobby." Since the club's inception in 1961, the MARC has brought together amateur radio enthusiasts, also known as 'hams', from Milledgeville and across Middle Georgia. Begun as an offshoot of a student club at Georgia Military College after its original members graduated college, the club has served as a resource for amateur operators for nearly 65 years (a founding member of that group, Charles Pennington of Sandersville, remains a club member to this day). Although the hobby is often seen as dying or outdated, new technologies and modes of communication have created a new generation of amateur enthusiasts. "There are so many different things in this hobby for people to do, and that's the thing that's really neat about it," said Probst. "Daniel and I do some of the same stuff, but everybody in the club isn't interested in the same thing. We have some members that enter contests, some members that are interested in digital modes, meaning things you can do with your computer through a radio, and people can also talk via satellites. We don't have any in our club, but there are people who will bounce a signal off the moon just because they can." For a hobby that can trace its roots back as early as the late 19th century, amateur radio has grown to incorporate a vast number of voice, text, image and data transfer technologies by operators across the globe. Ham radios can be operated from nearly any point across the globe and, together with a portable power source, do not rely on any centralized cell towers or infrastructure. This ability allows operators to send and receive communications in times of crisis and natural disaster, giving hams a unique role as the go-to messengers for wherever internet and phone lines are knocked out.
07/17/2017 08:01 PM
Amateurlogic 106 is Released:
Field Day At The W5JDX and Ozone Shacks. Peter mods his BitX transceiver. Emile at the Jupiter Light House. And an old school Megger.
07/16/2017 08:13 PM
Ham Radio Club at Potti Sriramulu College Soon:
As part of its efforts to inculcate interest among students in the unique art of Ham operation, the management of the Potti Sriramulu Chalavadi Mallikarjuna Rao College of Engineering and Technology has decided to set up a Ham Radio Club in the institute. Principal K. Nageswara Rao, who himself is a Ham operator since his college days, encouraged students to take to Ham radio and explore new areas in electronics and communications.
07/15/2017 08:08 PM
Pine Board Transmitter Building:
The Pine Board Project begins building 80 and 40 meter AM tube transmitter on Ham Nation this week. Join the hundreds who are following and building this modular Pine Board project. Put Ham Nation into Google and follow the show on Leo Laporte's TWIT network each Wednesday at 8 PM, CDT.
07/15/2017 08:01 PM
Historic Point Maritime Radio Station Returns to Air on Night of Nights:
Point Reyes National Seashore is home to one of the most historic morse code radio stations in the United States. In 1999, it became the last commercial station to send and receive morse code messages. But a group of dedicated volunteers are keeping the tradition, and the station, alive. KRCB's Tiffany Camhi reports.
07/15/2017 08:01 PM
How Aadhaar is Coming to the Aid of Abandoned Elderly:
India is home to nearly 90 million elderly individuals and in the last few years such cases of abandoning have been on the rise. The figure in one hospital alone depicts the sorry state of the elderly across the country. India is home to nearly 90 million elderly individuals and in the last few years such cases of abandoning have been on the rise. Taking note of the issue, the West Bengal Radio Club (Amateur Club) has come up with a unique idea to reunite the abandoned elderly with their family members. The club is using a Biometric system in assistance with Aadhaar card agencies certified by the government to track down the families. "We along with Aaadhar card agencies are going through fingerprint tests of the elderly in order to get their residential address. This particular method gets a positive result only in case of those who have registered themselves under the Aadhaar scheme. But for those who have not, we take the help of the police to locate their houses," said Ambarish Nag Biswas, a licenced amateur radio operator and a member of the West Bengal Radio Club (Amateur Club).
07/15/2017 08:00 PM
Unlocking Mysteries in the Sun's 11-Year Cycle:
Our sun may be special to us, but among all the stars in the galaxy, it's not that unique. According to a study published Thursday in the journal Science, our beloved star can be classified as an ordinary "solar-type" star, meaning that the internal processes that control its activity are similar to those seen in many other nearby stars. The sun goes through an 11-year cycle where its magnetic poles flip -- imagine the north and south poles on Earth changing place -- and during this time the sun's activity changes between subdued and tumultuous. When activity is low, it is known as solar minimum, and when activity is high, it is known as solar maximum. As the sun nears solar maximum and its activity cycle ramps up, its surface gets covered in sunspots, which are ephemeral dark marks created by strong magnetic activity. "Above sunspots you have complex structures that trigger dynamic phenomenons, eruptions that are like volcanoes," said Antoine Strugarek, a solar physicist at the French Alternative Energies and Atomic Energy Commission and at the University of Montreal. "Those eruptions can impact our Earth." The sun's emissions can interact with satellites and even influence power grids on Earth, according to Dr. Strugarek. So to better predict the sun's activity, scientists need to better understand the 11-year cycle and how it generates magnetic fields. Additionally, some scientists have argued that our sun's 11-year cycle is fundamentally different from those of other stars, so Dr. Strugarek and his colleagues designed a model to investigate what controls a star's activity cycle. They used the model to study how the hot, turbulent plasma that flows inside a star can generate magnetic fields that affect activity cycles.
07/14/2017 08:43 PM
The Sun's Sound Waves Reveal that Its Surface is Thinning:
Celestial acoustic research shows that the sun's outer layers are more sensitive to medium and higher frequencies, indicating that some areas of the solar surface have weakened. The celestial music released from the sun suggests that its outer layer has grown weaker over the years, according to new research from the United Kingdom. The sun releases sound waves, and like a musical instrument, the structure of the sun informs the way the sound waves are shaped. Scientists can study the sun's oscillations by listening to the frequencies that make up the sound signal, thereby learning something about the object making the sound. Because the waves are generated by and pass through different sections of the sun, the wave frequency reveals clues about the inside of the sun and allows scientists to chart changes in the star's life. Scientists from the Birmingham Solar-Oscillations Network at the University of Birmingham, in the United Kingdom, used the sun's sound waves to determine that one of its outermost layers may be growing thinner. [How the Sun's Magnetic Field Works (Infographic)] "The sun is the only star on which we can get this level of detail," Yvonne Elsworth, a researcher working on the project at the University of Birmingham, told Space.com in an email. "Other stars do show activity cycles, and if we can understand the processes in the sun, we will be able to extend the ideas to other stars." "The study of the sun is crucial to scientists' understanding of the cosmos because it is the closest star to our planet, and learning about its life processes reveals more about the dynamics of stars many light-years away," she added.
07/14/2017 08:41 PM
FCC Expands Vehicle Radar Frequencies:
Whether it's for convenience features like adaptive cruise control, semi autonomous safety features like automatic braking, or for fully autonomous driving, more cars are being equipped with radar systems to detect other vehicles on the road. At some point, these systems could start to interfere with each other, like how the FM band in big cities is full of stations steping on each others' broadcasts. While the only real consequence of that scenario is that there's static on your favorite Wiz Khalifa song, when it comes to vehicle radar interference, the consequences could be dire -- particularly if the car is relying on that radar to detect other vehicles and avoid crashing into them. To prevent this, the FCC just vastly expanded its frequency allocations for vehicle radar, Reuters reports. This is the conclusion of a two-year process initiated by Bosch specifically for vehicle radar, according to the FCC Notice of Proposed Rulemaking. Originally limited to 76-77 GHz, the FCC's ruling expands the vehicle radar allocation to 76-81 GHz, taking over frequencies allocated to radiolocation and amateur radio operators. According to the American Radio Relay League, amateur operations on the current 76-77 GHz vehicle radar frequencies had already been suspended pending verification that ham radio operators will not interfere with vehicle radar systems. It is probably safe to assume that this suspension will extend to the new vehicle radar frequencies, as well.