In 1992, Jim Valvano – a former basketball player, coach of the 1983 champion North Carolina State men’s basketball team, and broadcasting personality – was diagnosed with metastatic cancer that had spread to his spine.
Up until this point, the charismatic Queens, N.Y.-native was best known for his celebration after defeating the Houston Cougars in the 1983 NCAA championship game. You can see “Jimmy V” running onto the court about 9 seconds into the video below:
“Time is very precious to me. I don’t know how much I have left and I have some things that I would like to say. Hopefully, at the end, I will have said something that will be important to other people, too.”
It was just a decade later that his life was tragically cut short. But before he went, even knowing the end could be near, he was able to accept the Arthur Ashe Courage and Humanitarian Award at the first annual ESPY Awards. It was a speech that echoed for years to come and remains one of the most memorable.
Those are words appropriate for fighting cancer, being the underdog in the country’s biggest basketball tournament, or even fighting alongside your brothers and sisters in arms, far from your family and loved ones.
“To me, there are three things we all should do every day… Number one is laugh. You should laugh every day. Number two is think. You should spend some time in thought. Number three is, you should have your emotions moved to tears, could be happiness or joy… think about it: If you laugh, you think, and you cry, that’s a full day. That’s a heck of a day. You do that seven days a week, you’re going to have something special.”
But about a week or so before, Jimmy V gave a speech commemorating the Wolfpack’s 1983 NCAA championship to the team, current players, and Wolfpack fans. That speech was one for the ages. It will keep you shouting the mantra of, “Don’t give up! Don’t ever give up!” during any rough time in your life.
Jim Valvano died from the cancer he was determined to fight just a month or so after his legendary ESPY Awards speech. His name and spirit live on through the V Foundation for Cancer Research.
The Defense Advanced Research Projects Agency is known for its baller tech, from helping to invent the internet and Google Maps to developing artificial intelligence and drone swarms. For the last few years, they’ve been looking into how to make vehicles safer in combat without strapping ever-increasing amounts of armor to it.
Demonstrations of DARPA’s Ground X-Vehicle Technologies
The Ground X-Vehicle Technologies (GXV-T) Program is largely complete, and it’s archived on DARPA’s website. Most of the tech has proven itself in the lab and testing, but now some will—and some won’t—get deployed to units over the next few years.
One of the more exciting and groundbreaking technologies is the Multi-mode Extreme Travel Suspension. This equips vehicles with a suspension that can raise wheels 30 inches or drop them 42 inches, and each tire is controlled separately. That means that a vehicle can drive with an even cab, even when the slope is so great that the wheels are separate in height by six feet. It also means that the vehicles can get to hard-to-reach places quickly.
Other tech breakthroughs looking to increase off-road mobility included the Electric In-Hub Motor—which crams an entire electric motor with a three-speed gearbox and cooling into a standard 20-inch rim—and the Reconfigurable Wheel-Track which can roll like a normal tire or turn into a triangular track that works like a mini-tank tread.
But there are also breakthroughs focused on getting rid of windows and making crews able to move faster and more safely. The Virtual Perspective Augmenting Natural Experience program allowed vehicle crew members to drive a windowless RV with better visibility than a normal driver. Not only can they see what would be visible from the vehicle thanks to LIDAR, but they could also “see” the environment from a remote perspective.
Basically, they could be their own ground guide.
The Off-Road Crew Augmentation program, meanwhile, draws an estimated safest path for drivers moving off-road, and it can do so with no windows facing out. That means vehicle designers can create a next-gen vehicle with no windows, historically a weak spot in the armor. Ultraviolet light from the sun slowly breaks down ballistic glass, so “bulletproof” windows aren’t really bulletproof and will eventually expire.
All of the major breakthroughs were part of research partnerships or contracts with different manufacturers, and it remains to be seen whether the military branches will request prototype vehicles that use the tech. But there’s a chance that your next ride, after the current iteration of the JLTV, will be something a little more exotic.
U.S. President Donald Trump has said his administration was considering a request for a permanent U.S. military presence in Poland.
Trump made the comments in Washington on Sept. 18, 2018, before a meeting at the White House with Polish President Andrzej Duda.
“Poland is willing to make a very major contribution to the United States to come in and have a presence in Poland, and certainly it’s something we’ll discuss,” Trump said, adding that “we’re looking at it very seriously.”
Poland has requested the deployment several times and has offered up to billion in funding for a base. U.S. forces currently serve in Poland as part of NATO’s back-to-back rotation program.
President Donald J. Trump and President Andrzej Duda.
(Official White House Photo by Shealah Craighead)
Poland has said a permanent U.S. presence is needed to counter Russian military activity in the region.
Russia has objected to the proposal, saying it views NATO expansion toward the east as a threat to stability in Europe.
Featured image: President Donald J. Trump and First Lady Melania Trump with Andrzej Duda, President of the Republic of Poland, and Mrs. Kornhauser-Duda.
On Thursday, Marine Corps Recruit Depot Parris Island issued a press release identifying Marine Recruit Austin Farrell as the deadliest recruit ever to pass through the Corps’ infamously difficult rifle qualification course. Farrell grew up building and shooting rifles with his father, and when it came time to qualify on his M16A4 service rifle, the young recruit managed a near-perfect score of 248 out of a maximum possible 250 points on Table One.
“I grew up with a rifle in my hand; from the time I was six I was shooting and building firearms with my dad, he was the one that introduced me to shooting, and when I got to Parris Island, what he taught me was the reason I shot like I did,” said Farrell.
The Marine Corps is renown for its approach to training each and every Marine to serve as a rifleman prior to going on to attend follow-on schools for one’s intended occupational specialty. As a result, Table One of the Marine Corps’ Rifle Qualification Course is widely recognized as the most difficult basic rifle course anywhere in the America’s Armed Forces.
All Marines, regardless of ultimate occupation, must master engaging targets from the standing, kneeling, and prone positions at ranges extending as far as 500 yards. In recent years, the Corps has shifted to utilizing RCOs, or Rifle Combat Optics, which aid in accuracy, but still require a firm grasp of marksmanship fundamentals in order to pass.
While no other military branch expects all of its members to be deadly at such long distances, for Farrell, 500 yards wasn’t all that far at all. While new to the Corps, this young shooter is no stranger to long-distance shooting.
“I would go out to a family friend’s range five days a week and practice shooting from distances of up to a mile, it’s a great pastime and teaches you lessons that stay with you past the range.”
Recruit Austin Ferrell with Kilo Company, 3rd Recruit Training Battalion fires his M16A4 Service Rifle during the Table One course of fire on Marine Corps Recruit Depot, Parris Island S.C. July 30, 2020. (U.S. Marine Corps photo by Cpl. Shane Manson)
As all recruits come to learn, being a good shooter isn’t just about nailing the physical aspects of stabilizing yourself, acquiring good sight picture, and practicing trigger control along with your breathing. Being a good shooter is as much a mental activity as it is a physical one. As Farrell points out, being accurate at a distance is about getting your head in the right the place. Of course, getting relaxed and staying relaxed is one thing… doing it during Recruit Training is another.
“Practice before I got here was definitely a big part of it, but getting into a relaxed state of mind is what helped me shoot… after I shot a 248 everyone was congratulating me, but when I got back to the squad bay my drill instructors gave me a hard time for dropping those two points,” Farell laughed.
(U.S. Marine Corps photo by Cpl. Shane Manson)
The young recruit is expected to graduate from Recruit Training on September 4, 2020 and while it’s safe to say most parents are proud to see their sons and daughters earn the Eagle, Globe, and Anchor, Farrell’s father George is already celebrating his son’s success.
“I’m so proud of him, no matter what I’m proud of him but this is above what I expected,” said George. “I always told him to strive to be number one, and the fact that he was able to accomplish that is just a testament to his hard work.”
The US Navy broke with its tradition of hyping up F-35 deployments when it sent the USS Essex jump-jet carrier into the Western Pacific with a deck full of the revolutionary fighter jets this week — and it could signal a big change in how the US deals with its toughest adversaries.
When the USS Wasp became the first small-deck aircraft carrier to deploy with US Marine Corps F-35Bs in early 2018, the media was in on it. But the Essex’s departure marks a change, as the Navy announced the deployment only after the ship departed, USNI News noted.
The Navy regularly deploys capital ships like small- and large-deck carriers for patrols around the world but has only twice deployed ones like these.
The F-35 has become the most expensive weapons system in history and earned its share of criticism along the way as costs ballooned and deadlines fell through. The Marine Corps’ F-35B is designed to land vertically and take off from short runways, like an amphibious assault ship, and will replace the AV-8B Harrier in ground and air attack missions; the Navy’s F-35C has a tailhook to snag an arresting cable and land on an aircraft carrier.
The Navy wants to change the media’s expectations regarding ship deployments to the Pacific, sources told USNI News.
The US military usually prides itself on publicizing its ship deployments and often says its carrier deployments are drawn up apolitically and months ahead of time, but insisting on some level of secrecy betrays that.
The flight deck of the USS Ronald Reagan in the Luzon Strait.
(U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan McFarlane)
What does the US Navy have to hide in the Pacific?
The US has major adversaries in the Pacific — namely China and, to a lesser extent, North Korea.
It makes sense that with dialogue underway with North Korea, the US would want to quiet big deployments to the Western Pacific, and a high-profile deployment of next-generation stealth jets could seriously spook North Korea.
But it’s China’s navy that poses the biggest threat to the US, and it’s possibly the reason the US is staying quiet.
When the USS Ronald Reagan, the US’s forward-deployed aircraft carrier in Japan, patrolled the South China Sea, which China unilaterally claims as its own in defiance of international law, the US said very little about it. Repeated requests for comment from Business Insider went ignored.
The US uses its Navy to challenge what it calls excessive maritime claims of dozens of nations around the world in passages called “freedom of navigation” operations. Basically, if a country claims an excessive amount of maritime territory, the US usually sails a destroyer through to inform it that its claims are not recognized.
China views these patrols as a challenge to its sovereignty and makes a big deal out of them. For the US, it’s better if the challenges to China’s claims are the norm and not a news story. Some observers have speculated that the US wants to send a message to China’s military leadership without the publicity that may compel them to escalate.
By keeping quiet high-profile deployments to the Pacific, the US could be signaling that it’s getting ready to put the ball back in China’s court, with high-end military hardware checking it and disputes handled between navies rather than via press releases.
This article originally appeared on Business Insider. Follow @BusinessInsider on Twitter.
North Korea could launch a full-blown nuclear strike on the US as early as July 23, 2018, according to a prediction from Britain’s Ministry of Defense.
A government minister gave the assessment to a parliamentary committee in early 2018 as part of its efforts to assess Kim Jong Un’s ability to precipitate a nuclear war.
Lord Howe, a British defense minister, told parliament’s Defense Committee that the Defense Ministry thought North Korea would be fully nuclear-capable within “six to 18 months.”
The statements, made at a Jan. 23 hearing, were published April 5, 2018, in a committee report on North Korea’s nuclear ambitions. The earliest possible date for a strike in Howe’s time frame is July 23, 2018; the far estimate is the same date in 2019.
The Defense Ministry on April 5, 2018, told Business Insider it stood by the dates.
“We judge that they are now certainly capable of reaching targets in the short range, by which I mean Japan, South Korea — obviously — and adjoining territories,” Howe told MPs. “Our judgment is that it will probably be six to 18 months before they have an ICBM capability that is capable of reaching the coast of the United States or indeed ourselves.”
(Photo from KCNA)
North Korea tested multiple nuclear weapons and intercontinental ballistic missiles in 2017. Based on the tests, experts said North Korea could probably get a missile to hit the US mainland — but still lacked the technology to carry a heavy nuclear warhead that far.
The Defense Ministry believes the country is now working on that technology; attaching a nuclear weapon to an ICBM would allow North Korea to carry out a nuclear strike in most of the world.
“A nuclear strike capability depends on marrying up the ballistic missile with the warhead, and that is, we judge, work in progress,” Howe said.
The Defense Ministry confirmed Howe’s assessment on April 5, 2018.
“We stand by our defense minister’s comments,” a spokesman told Business Insider.
Though there appears to be a growing rapprochement between North Korea and the US, Pyongyang appears to be preparing a satellite launch that could ruin the coming discussions with US President Donald Trump.
North Korea has scuppered multiple talks about disarmament by launching satellites in the past.
When Paul Tibbets died in January 2007, he had been retired from the Air Force since 1966. He was never forgotten, however, and never would be. He was the man who dropped the first atomic weapon used in combat against an enemy city. But instead of being interred at home or at Arlington National Cemetery with all his brothers in arms, he was cremated and his ashes spread across the English Channel.
Tibbets in his later years.
It wasn’t that Tibbets wasn’t proud of his service. At the time of the Hiroshima bombing, he was one of the youngest, but most experienced pilots in the Army Air Forces. He proudly named his airplane Enola Gay after his beloved mother. He even re-enacted the bombing in a B-29 during a 1976 Texas air show and denounced the Smithsonian’s exhibition of the actual plane when it debuted because of the exhibition’s focus on the suffering of the Japanese people, and not the brutality of the Japanese military.
His family was also a proud military family. His grandson is an Air Force Academy graduate who came up flying B-2 Spirit bombers. But when he died at age 92, he requested cremation with no headstone – and no funeral, military honors or not.
Paul Tibbets Jr., left, and his grandson, then-Capt. Paul Tibbets IV, fly the last flyable B-29 Superfortress, ‘Fifi,’ in Midland, Texas.
The elder Tibbets was concerned that any grave or headstone he left behind would become ground zero for anti-nuclear weapons protests, anti-war protesters, or a place for any other kind of revision historian to make a stand against what he saw as the right history. Instead of that, he opted to be cremated and his ashes spread across the English Channel, where he had flown so often during the war.
Deadlifts are a power movement. This simple yet satisfying act involves loading a bar with heavy plates, chalking up your palms, and pulling it off the ground from a dead stop. It’s the essence of strength: you pick it up and then put it down. No fancy footwork or complex movements required — just a strong back and calloused hands.
The deadlift is an effective way to strengthen the entire posterior chain, and it offers benefits to anyone and everyone, regardless of athletic ability. But many people fear it for a variety of reasons.
In the 1960s, half the population had a physically demanding job. In 2011, that number shrank to just 20 percent. Technology has made our work less labor intensive, causing a decline in our overall health. We sit more than we stand, and we type more than we lift.
There are fewer labor-intensive jobs in the 21st century — and that’s not necessarily good for our health.
(Photo from the University of Northern Iowa’s Fortepan Iowa Archive)
Today, low back pain is one of the most common musculoskeletal conditions and is typically reported as one of the top three workplace injuries. That shouldn’t deter you from practicing deadlifts though — it should encourage you.
A study conducted in 2015 monitored patients using deadlifts as a part of the treatment plan for back pain. Seventy-two percent of participants reported a decrease in pain and an increase in overall quality of life.
Whether you’re picking up a laundry basket, a child, or a package in the mail — everyone deadlifts. The act of picking something up is a daily occurrence. The more we train our bodies with lifts that mimic life or our job, the more they will resist injury in our life. And if you’re in the U.S. Army, you don’t have a choice: the deadlift is slated to become a mandatory event in the new Army Combat Fitness Test in 2020.
1st Lt. Jake Matty, a Soldier from 1st Battalion, 21st Infantry Regiment, 2nd Infantry Brigade Combat Team, 25th Infantry Division (Gimlets) begins the 3-repetition strength deadlift during a field-testing of the Army Combat Fitness Test.
(Photo by SPC Geoff Cooper/U.S. Army)
However, people are intimidated because the lift can cause major problems when performed incorrectly. The most common mistakes associated with the deadlift are easily correctable:
Rounding the back: When you lose a neutral spine position, the risk of disc herniation is increased. To combat this is, ensure you have tension applied prior to lifting the weight. Activate the latissimus dorsi muscles (lats) by imagining you have an orange in your armpit that you need to squeeze.
Neck misalignment: Ensure your neck is in line with your back. As you lift the bar, your neck should rise at the same rate as your back.
Improper setup: The bar should rest no more than 1 to 2 inches in front of your shins, and your knees should remain vertical to the ankles. If the knees are pushed forward, the barbell is forced to move around them, putting stress on the low back.
The anatomy of a deadlift.
(Photo courtesy of Calispine)
If you’re ready to get started, head down to your local gym — you’ll need a barbell and plates for weight. I recommend trying these three deadlift variations, which offer simplicity and massive benefits. And don’t be afraid to ask a trainer or experienced lifter to take a look at your form!
1. Landmine Deadlift
The term “landmine” indicates that the barbell is anchored into a holder or a corner to angle it. This lift is generally safe because the body remains mostly upright and encourages a flat back.
The trap bar deadlift engages the same muscle groups as a traditional deadlift but puts additional stress on the quadriceps, glute muscles, and hamstrings. The trap bar was designed for the lifter to grip the bar at the sides rather than in front and, in turn, puts less stress on the back.
This variation is beneficial for lifters who want to increase the positional strength of the lower back, hips, and hamstrings. It also serves as an accessory movement to increase traditional deadlifting numbers. The weight you’re able to lift will be less during this variation but will increase when you convert to a traditional style.
As with anything in life, when something is done incorrectly, there is a chance of negative consequences — in this case, possible injury. But with proper execution, the benefits of the deadlift can be lifelong.
Navy SEALs are all over the place. In books, at the movies, and on the news. But when they assault a target, they do so quickly and quietly, trying to get the job done before anyone realizes they’re around. Here’s how they do it.
The SEALs will plan their missions down to the finest detail and, when possible, rehearse it beforehand. They’ll review all intelligence and check all their equipment before heading out. When possible, they prefer to time their missions for early morning or late night when the U.S. military’s optical equipment gives them a major edge over the bad guys.
One of the hallmarks of the SEALs are the many cool ways they can arrive at an objective. Their name is even an acronym for sea, air, and land, the three avenues they’ll attack from. They can ride to the beach on a boat deployed from a ship or helicopter, they can parachute in, or they can even move in using clandestine submarines.
While part of the team moves to the target buildings to force entry, part of the team will split off and establish overwatch positions where they’ll keep an eye out for dangers like enemy reinforcements, people trying to escape the target building, and fighters attempting to maneuver on the other SEALs.
SEALs can’t afford to be stopped by minor things like steel doors or fortifications. They’ll go through windows, force open doors, or even blow out walls to get at their targets.
Assault through the house
Once inside, the elite sailors will go through the building and seek out their objective. SEALs train extensively on close quarters combat and urban operations, so they move quickly. As in the picture above, team members look in different directions to ensure they aren’t ambushed.
After grabbing or killing their target, it’s time to leave, or exfiltrate, the objective area. If the SEALs rode a boat in, they might take that back out to sea to link up with a Navy ship. They can also call in helicopter extractions, move out on foot, or take a swim to a rendezvous.
Developed over the course of decades, GPS has become far more ubiquitous than most people realize. Not just for navigation, its extreme accuracy in time keeping (+/- 10 billionths of a second) has been used by countless businesses the world over for everything from aiding in power grid management to helping manage stock market and other banking transactions. The GPS system essentially allows for companies to have near atomic clock level precision in their systems, including easy time synchronization across the globe, without actually needing to have an atomic clock or come up with their own systems for global synchronization. The problem is that, owing to a quirk of the original specifications, on April 6, 2019 many GPS receivers are about to stop working correctly unless the firmware for them is updated promptly. So what’s going on here, how exactly does the GPS system work, and who first got the idea for such a system?
On Oct. 4, 1957, the Soviet Union launched Sputnik. As you might imagine, this tiny satellite, along with subsequent satellites in the line, were closely monitored by scientists the world over. Most pertinent to the topic at hand today were two physicists at Johns Hopkins University named William Guier and George Weiffenbach.
As they studied the orbits and signals coming from the Sputnik satellites the pair realized that, thanks to how fast the satellites were going and the nature of their broadcasts, they could use the Doppler shift of the signal to very accurately determine the satellite’s position.
A replica of Sputnik 1.
Not long after, one Frank McClure, also of Johns Hopkins University, asked the pair to study whether it would be possible to do this the other way around. They soon found that, indeed, using the satellite’s known orbit and studying the signal from it as it moved, the observer on the ground could in a relatively short time span determine their own location.
This got the wheels turning.
Various systems were proposed and, in some cases, developed. Most notable to the eventual evolution of GPS was the Navy’s Navigation Satellite System (also known as the Navy Transit Program), which was up and running fully by 1964. This system could, in theory, tell a submarine or ship crew where they were within about 25 meters, though location could only be updated about once per hour and took about 10-15 minutes to acquire. Further, if the ship was moving, the precision would be off by about one nautical mile per 5 knots of speed.
Another critical system to the ultimate development of GPS was known as Timation, which initially used quartz clocks synchronized on the ground and on the satellites as a key component of how the system determined where the ground observer was located. However, with such relatively imprecise clocks, the first tests resulted in an accuracy of only about 0.3 nautical miles and took about 15 minutes of receiving data to nail down that location. Subsequent advancements in Timation improved things, even testing using an atomic clock for increased accuracy. But Timation was about to go the way of the Dodo.
By the early 1970s, the Navigation System Using Timing and Ranging (Navstar, eventually Navstar-GPS) was proposed, essentially combining elements from systems like Transit, Timation, and a few other similar systems in an attempt to make a better system from what was learned in those projects.
Fast-forward to 1983 and while the U.S. didn’t yet have a fully operational GPS system, the first prototype satellites were up and the system was being slowly tested and implemented. It was at this point that Korean Air Lines Flight 007, which originally departed from New York, refueled and took off from Anchorage, Alaska, bound for Seoul, South Korea.
What does this have to do with ubiquitous GPS as we know it today?
On its way, the pilots had an unnoticed autopilot issue, resulting in them unknowingly straying into Soviet airspace.
Convinced the passenger plane was actually a spy plane, the Soviets launched Su-15 jets to intercept the (apparently) most poorly crafted spy plane in history — the old “It’s so overt, it’s covert” approach to spying.
A Soviet Sukhoi Su-15 interceptor.
Warning shots were fired, though the pilot who did it stated in a later interview, “I fired four bursts, more than 200 rounds. For all the good it did. After all, I was loaded with armor piercing shells, not incendiary shells. It’s doubtful whether anyone could see them.”
Not long after, the pilots of Korean Air 007 called Tokyo Area Control Center, requesting to climb to Flight Level 350 (35,000 feet) from Flight Level 330 (33,000 feet). This resulted in the aircraft slowing below the speed the tracking high speed interceptors normally operated at, and thus, them blowing right by the plane. This was interpreted as an evasive maneuver, even though it was actually just done for fuel economy reasons.
A heated debate among the Soviet brass ensued over whether more time should be taken to identify the plane in case it was simply a passenger airliner as it appeared. But as it was about to fly into international waters, and may in fact already have been at that point, the decision was made to shoot first and ask questions later.
The attacking pilot described what happened next:
“Destroy the target…!” That was easy to say. But how? With shells? I had already expended 243 rounds. Ram it? I had always thought of that as poor taste. Ramming is the last resort. Just in case, I had already completed my turn and was coming down on top of him. Then, I had an idea. I dropped below him about two thousand metres… afterburners. Switched on the missiles and brought the nose up sharply. Success! I have a lock on.
Two missiles were fired and exploded near the Boeing plane causing significant damage, though in a testament to how safe commercial airplanes typically are, the pilots were able to regain control over the aircraft, even for a time able to maintain level and stable flight. However, they eventually found themselves in a slow spiral which ended in a crash killing all 269 aboard.
As a direct result of this tragedy, President Ronald Reagan announced on Sept. 16, 1983, that the GPS system that had previously been intended for U.S. military use only would now be made available for everyone to use, with the initial idea being the numerous safety benefits such a system would have in civil aviation over using then available navigation tools.
This brings us to how exactly the GPS system works in the first place. Amazingly complex on some levels, the actual nuts and bolts of the system are relatively straightforward to understand.
To begin with, consider what happens if you’re standing in an unknown location and you ask someone where you are. They reply simply — “You are 212 miles from Seattle, Washington.”
You now can draw a circle on a map with radius 212 miles from Seattle. Assuming the person giving you that information is correct, you know you’re somewhere along that circular line.
Not super helpful at this point by itself, you then ask someone else, and they say, “You are 150 miles from Vancouver BC.” Now you’re getting somewhere. When you draw that circle on the map, you’ll see it intersects at two points. You are standing on one of those two points. Noticing that you are not, in fact, floating in the ocean, you could at this point deduce which point you are on, but work with us here people.
Instead of making such an assumption, you decide your senses are never to be trusted and, after all, Jesus stood on water, so why not you? Thus, you ask a third person — they say, “You are 500 miles from Boise, Idaho.” That circle drawn, you now know exactly where you are in two dimensional space. Near Kamloops, Canada, as it turns out.
This is more or less what’s happening with GPS, except in the case of GPS you need to think in terms of 3D spheres instead of 2D circles. Further, how the system tells you your exact distance from a reference point, in this case each of the satellites, is via transmitting the satellites’ exact locations in orbit and a timestamp of the exact time when said transmission was sent. This time is synchronized across the various satellites in the GPS constellation.
The receiver then subtracts the current known time upon receiving the data from that transmission time to determine the time it took for that signal to be transmitted from the satellites to its location.
Combining that with the known satellite locations and the known speed of light with which the radio signal was propagated, it can then crunch the numbers to determine with remarkable accuracy its location, with margins of error owing to things like the ionosphere interfering with the propagation of the signal, and various other real world factors such as this potentially throwing things off a little.
Even with these potential issues, however, the latest generation of the GPS system can, in theory, pinpoint your location within about a foot or about 30 centimeters.
You may have spotted a problem here, however. While the GPS satellites are using extremely precise and synchronized atomic clocks, the GPS system in your car, for example, has no such synchronized atomic clock. So how does it accurately determine how long it took for the signal to get from the satellite to itself?
It simply uses at least four, instead of three, satellites, giving it the extra data point it needs to solve the necessary equations to get the appropriate missing time variable. In a nutshell, there is only one point in time that will match the edge of all four spheres intersecting in one point in space on Earth. Thus, once the variables are solved for, the receiver can adjust its own time keeping appropriately to be almost perfectly synchronized, at least momentarily, with the much more precise GPS atomic clocks. In some sense, this makes GPS something of a 4D system, in that, with it, you can know your precise point in not only space, but time.
By continually updating its own internal clock in this way, the receiver on the ground ends up being nearly as accurate as an atomic clock and is a time keeping device that is then almost perfectly synchronized with other such receivers across the globe, all for almost no cost at all to the end users because the U.S. government is footing the bill for all the expensive bits of the system and maintaining it.
Speaking of that maintanence, another problem you may have spotted is that various factors can, and do, continually move the GPS satellites off their original orbits. So how is this accounted for?
Tracking stations on Earth continually monitor the exact orbits of the various GPS satellites, with this information, along with any needed time corrections to account for things like Relatively, frequently updated in the GPS almanac and ephemeris. These two data sets are used for holding satellite status and positional information and are regularly broadcast to receivers, which is how said receivers know exact positions of the satellites in the first place.
The satellites themselves can also have their orbits adjusted if necessary, with this process simply being to mark the satellite as “unhealthy” so receivers will ignore it, then move it to its new position, track that orbit, and once that is accurately known, update the almanac and ephemeris and mark the satellite as “healthy” again.
So that’s more or less how GPS came to be and how it works at a high level. What about the part where we said many GPS devices may potentially stop working very soon if not updated?
Near the turn of the century something happened that had never happened before in the GPS world — dubbed a “dress rehearsal for the Y2K bug”. You see, as a part of the time stamp sent by the GPS satellites, there is something known as the Week Number — literally just the number of weeks that have passed since an epoch, originally set to Jan. 6, 1980. Along with this Week Number the number of seconds since midnight on the previous Saturday evening is sent, thus allowing the GPS receiver to calculate the exact date.
Artist’s conception of GPS Block II-F satellite in Earth orbit.
So what’s the problem with this? It turns out every 1024 weeks (about every 19 years and 8 months) from the epoch, the number rolls back to 0 owing to this integer information being in 10 bit format.
Thus, when this happens, any GPS receiver that doesn’t account for the Week Number Rollover, will likely stop functioning correctly, though the nature of the malfunction varies from vendor to vendor and device, depending on how said vendor implemented their system.
For some, the bug might manifest as a simple benign date reporting error. For others, such a date reporting error might mean everything from incorrect positioning to even a full system crash.
If you’ve done the math, you’ve probably deduced that this issue first popped up in August of 1999, only about four years after the GPS system itself was fully operational.
At this point, of course, GPS wasn’t something that was so ubiquitously depended on as it is today, with only 10-15 million GPS receivers in use worldwide in 1999 according to a 1999 report by the the United States Department of Commerce’s Office of Telecommunications. Today, of course, that number is in the billions of devices.
Thankfully, when the next Week Number Rollover event happens on April 6, 2019, it would seem most companies that rely on GPS for critical systems, like airlines, banking institutions, cell networks, power grids, etc., have already taken the necessary steps to account for the problem.
The more realistic problems with this second Week Number Rollover event will probably mostly occur at the consumer level, as most people simply are not aware of the issue at all.
Thankfully, if you’ve updated your firmware on your GPS device recently or simply own a GPS device purchased in the last few years, you’re probably going to be fine here.
However, should you own a GPS device that is several years old, that may not be the case and you’ll most definitely want to go to the manufacturer’s website and download any relevant updates before the second GPS epoch.
That public service announcement out of the way, if you’re now wondering why somebody doesn’t just change the specification altogether to stop using a 10 bit Week Number, well, you’re not the first to think of this. Under the latest GPS interface specifications, a 13 bit Week Number is now used, meaning in newer devices that support this, the issue won’t come up again for about a century and a half. As the machines are bound to rise up and enslave humanity long before that occurs, that’s really their issue to solve at that point.
Ever notice that your cell phone tends to lock on to your GPS position extremely quickly, even after having been powered off for a long time? How does it do this when other GPS devices must wait to potentially receive a fresh copy of the almanac and ephemeris? It turns out cell phones tend to use something called Assisted GPS, where rather than wait to receive that data from the currently orbiting GPS satellites, they will instead get it from a central server somewhere. The phone may also simply use its position in the cell phone network (using signals from towers around) to get an approximate location to start while it waits to acquire the signal from the GPS satellites, partially masking further delay there. Of course, assisted GPS doesn’t work if you don’t have a cell signal, and if you try to use your GPS on your phone in such a scenario you’ll find that if you turn off the GPS for a while and then later turn it back on, it will take a while to acquire a signal like any other GPS device.
Starting just before the first Gulf War, the military degraded the GPS signal for civilian use in order to keep the full accuracy of the system as a U.S. military advantage. However, in May of 2000, this policy was reversed by President Bill Clinton and civilian GPS got approximately ten times more accurate basically overnight.
The military also created the ability to selectively stop others from using GPS at all, as India discovered thanks to the Kargil conflict with Pakistan in 1999. During the conflict, the U.S. blocked access to the GPS system from India owing to, at the time, better longstanding relations between the U.S. and Pakistan than the U.S. had with India. Thus, the U.S. didn’t want to seem like it was helping India in the war.
This article originally appeared on Today I Found Out. Follow @TodayIFoundOut on Twitter.
Marine veteran Adam Driver and Navy veteran Sturgill Simpson are joined by a host of stars in director Jim Jarmusch’s zombie comedy “The Dead Don’t Die,” out now on Blu-ray, DVD and Digital.
Jarmusch is an arthouse director best known for underground hits like “Mystery Train,” “Stranger Than Paradise,” “Broken Flowers” and the recent vampire satire “Only Lovers Left Alive.” Actors love working with him, and he’s managed to also cast Bill Murray, Tilda Swinton, Tom Waits, Chloë Sevigny, Danny Glover, RZA from Wu-Tang Clan, Iggy Pop, teen star Selena Gomez and up-and-comer Austin Butler (who shined this summer in Quentin Tarantino’s “Once Upon a Time … in Hollywood” and will next play Army veteran Elvis Presley in Baz Luhrmann’s upcoming biopic).
That’s a lot of star power for an incredibly dry and low-key comedy about how small-town cops deal with a zombie invasion. The script beats its jokes into the ground, and how funny you find the movie is 100% dependent on how much you like that kind of humor.
There’s no one better than Driver to deliver a deadpan joke, and he’s hilarious as the dim deputy who works for Murray’s police chief. Not much happens in Centerville (“A Nice Place to Live,” promises the sign on the edge of town) and Driver’s Officer Ronnie Peterson has obviously had plenty of time to read up on the particulars of zombie invasions.
Driver previously worked with Jarmusch on “Paterson,” a character study about a New Jersey bus driver. It focused on the small details of his life and is a celebration of working-class life. It’s slow but beautiful. And it’s the best performance of Driver’s career to date. (You can stream it if you’ve got Amazon Prime.)
The former Marine is having a huge year. He was Oscar-nominated for his outstanding performance in Spike Lee’s 2018 movie “BlackKklansman.” Driver is again on Oscar watch lists as he stars in “The Report,” an upcoming film in which his character leads an investigation into the CIA’s post-9/11 Detention and Interrogation Program. Finally, he repeats his role as Kylo Ren in this December’s “Star Wars: The Rise of Skywalker,” the long-promised end to the original nine-movie Star Wars saga.
Sturgill Simpson – The Dead Don’t Die [Official Video]
Simpson wrote and recorded the theme song for “The Dead Don’t Die.” It’s a hard-core honky-tonk country song, and it’s constantly playing in the background during the movie, either on the radio or from a bootleg CD purchased from the town’s comic book shop. One of the movie’s running jokes is that one of the characters mentions the song and artist every time it’s heard in the movie. “Sturgill Simpson’s ‘The Dead Don’t Die'” is most definitely the phrase heard most often in the movie. Simpson also appears briefly as a guitar-dragging zombie.
Ironically, “The Dead Don’t Die” sounds like the throwback country hit that fans of his breakthrough 2014 album “Metamodern Sounds in Country Music” have long wanted to hear. Simpson won a Grammy for Best Country Album and was nominated for Best Album with the 2016 followup “A Sailor’s Guide to Earth.”
Simspon resumes his music career this Friday with the release of “Sound Fury,” an unapologetic rock album that leaves country music behind, possibly for good. A huge weekend profile in The New York Times suggests that Simpson became disillusioned with Nashville and unhappy with his own country material.
He served in Japan during his Navy stint and developed a love for the country’s manga (comics) and anime (animated films). He completed “Sound Fury” a couple of years ago and decided that he wanted anime films to go along with each song. Simpson enlisted top Japanese artists and sold the finished film to Netflix, where it will premiere Sept. 27, 2019, alongside the LP’s release.
Simpson is obviously both a restless soul and an ornery cuss. Will his country music fans follow him down this new path? It’s a huge and daring risk, one that doesn’t really have a parallel in country, rock, RB or pop music history.
He also filmed a part in the satirical action movie “The Hunt,” which was also scheduled for theatrical release this weekend before the studio freaked out about recent mass shootings and pulled the movie from release. Will we ever see “The Hunt”? It seems likely that it’ll go straight to home video sometime next year, after everyone forgets the controversy.
Sept. 27, 2019’s still a big day for Sturgill with the album and Netflix film. In the meantime, fans of his earlier music should check out “The Dead Don’t Die” to hear those sweet country western sounds that made him famous.
This article originally appeared on Military.com. Follow @militarydotcom on Twitter.
The first Royal Marine to receive the Victoria’s Cross earned the medal for gallantry at the Battle of Inkerman during the Crimean War when he lead his men against a Russian patrol despite being completely out of ammo. Since he couldn’t fire, he wrestled the enemy leader and threw him off a ridge.
John Pethyjohns joined the military in 1844 but, because he couldn’t read, did not know that the enlisting officer had misspelled his name as John Prettyjohns. The former farmworker slowly rose through the ranks and, in November 1854, he was a corporal helping lead a platoon against the Russians.
So Prettyjohns’ platoon was sent to clear Russian snipers out of caves near the main battlefield. The platoon sergeant and Prettyjohns led the attacks and cleared some caves, but then they noticed Russian reinforcements approaching up the hill.
The Battle of Inkerman by Victor Adam (Painting: Public Domain)
The Royal Marines were nearly out of ammunition and trapped on the hilltop, but Prettyjohns quickly improvised. He ordered the marines to collect stones and then to the edge of the summit to meet the Russians himself.
When the first Russian crested the hill, Prettyjohns grabbed him and executed a wrestling throw, hurling the Russian down the slope. The other marines, meanwhile, threw their rocks at the Russian patrol, fired a volley of rifle fire, and forced them to withdraw.
When the Victoria Cross was introduced, the marines chose to nominate Prettyjohns for his actions on the hill and he became the first Royal Marine to receive the award. He left the service in 1865 as a Colour Sergeant and died in 1887.