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How does GPS work?

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Wow, we are not worthy! There are so many smart people in this world Comment from : Ron Garza

blurring ruins the video Comment from : Mike Brady

T R I L A T E R A T I O N Comment from : Ender Craft

Nice Video Comment from : Metalock

GPS uses trilateration not triangulation Comment from : 倉本Kane

It’s not triangulation, it trilateraration Good video Comment from : Jonathon Hazelton

super smart technology🌍 Comment from : Nini Rema

Hi Comment from : Shobha Singh

you really do a good job tricking people into a physics class Comment from : luis henrique lapazin

Well done ! And thanks, I didn't know about each of these errors 🛰️ Comment from : Clément Jouette

I still don't understand how "a" (the time error) is calculated Comment from : Reuven Gruber

2022 Comment from : mr billy

8:52 An example of this is WAAS in aviationbrbr youtube/CeIEs9l9aws Comment from : Sgf Gustafson

Great job Thanks ❤ Comment from : Chris Kopec

I'm sure you already know what GPS isbrBut have you ever wondered how GPS is?brbrEveryone always asks what GPS is but no-one asks how GPS isbrbrbrXD Comment from : BlackWater 49

when i studied linear algebra i got so mindblown by this Comment from : HaNa

Comment from : John E Carr

That was better than any other gps vid I’ve seen Generally I want to punch the screen Not this time Btw, few handheld GPS receivers are capable of dual frequency reception SPS (standard positioning service) by L1 only is normal L1/L2 receivers are quite a bit more expensive brbr(I use gps phase differential relative baseline I geodetic surveys) Comment from : Larry Scott

GPS is a ground based system LORAN (Long range hyperbolic radio navigation system) proved this decades ago with a ground range of up to 2400km no satellites required, obviously since WWII the infrastrcture and technology have improved and public GPS frequencies are open on all cell towers the towers never move and that is how we get very accurate positioning on GPS enabled devices cell signal and GPS are basically the same technology just running at different frequencies, the GPS frequencies are lower and travel further obviously there are other factors such as the size and power of your hardware, satelite phones are just normal mobile phones but with better hardware designed to achieve greater range obviously marine industry navegation tech is more powerful still Comment from : Geoff Dutton

A few missing bits which are military but on the whole good video 👍 Comment from : Omar Al-Farouq

Speed of light or speed of sound? Sound makes more sense to me if its using radio waves Comment from : Extra Mental

I often have 7 satellites acquired for high altitude kite flying We have the World altitude record at 16,009 ft above ground level I use 3 different GPS units Comment from : Robert Moore

Well explained what to do if sender and receiver have different times Comment from : Ben Ji

As a gps software engineer, this is very good It may be beyond explaining how but rtk gps receivers can achieve accuracies less than a quarter inch Making them useful for survey applications Comment from : Steven Colborne

This video is the best one that I have seen that explains GPS for lay usersbrAs Im neither a physicist or a professional navigator it is little relevance to me as to how relativistic effects affect the GPS All I need to know is that they exist and the receiver compensates for thembrAnother great videobrREQUEST: How about an update to cover GNSS Comment from : Al Gordon

Really nice job brIf you felt up to it, you could do a video on Space-Based Augmentation (SBAS) such as the WAAS system in the US or EGNOS in Europe These are ways to augment GPS to improve performance and integrity using a network of fixed known ground-based receivers - basically an extended implementation of Differential GPS Comment from : John Lacey

My mind still gets boggled that the piece of glass, plastic, metal, silicon etc, aka a phone that I'm holding in my hand, can communicate all the way to a Satellite in orbit very far awaybrIt's amazing, and mind boggling Comment from : JasperHuskyFox

Thanks Comment from : Markus Limacher

What's with blurry blobs representing buildings? Comment from : Jakub Narębski

Ok you need to stip eith using logoes in ur examples its getting snnoying with the blurry stuff Comment from : DweltMusic

How quickly satellite locations are changing and how many in total are in service? Comment from : ikmkz

nice thanks Comment from : commonerIndian

0:10 Trilateration uses distances, triangulation use angles Comment from : Magnús Másson

Excellent video! I would include: With only 1 satellite the position will be within the surface of a sphere With a second satellite, the position will be within the intersection of 2 spheres; that is, a circle With the 3rd satellite the position will be within the intersection of the circle and the sphere; that is, 2 points With the fourth satellite you will have a unique possible position More satellites will increase accuracy Comment from : Diogenes Santander

Subscribed 🔥 🔥 🔥 Comment from : ARIF AHAMED

Thanks Again very good explanation on GPS Comment from : Ian Kavua

very helpful , and the explanation was very clear Comment from : Helen Madeleine Craft

:) Comment from : J

7:34 This is slightly wrong bSpecial/b Relativity says that the satellite clocks run SLOWER due to relative speedbrbrHowever, bGeneral/b Relativity says that the satellite clocks run FASTER because they experience less of Earth's gravity The gravity effect is far greater than the speed effect, and so the satellites have a net gain in clock speed Comment from : Nora

Great 👍 thanks 🙏 Comment from : Flap&Throttle

As far as I know speed of satellite orbit is irrelevant due to being way slower than speed of light The relativistic effect that takes place is due to the curvature of space-time caused by the mass of the earth brbrTime is flowing faster for the satellite with respect to us due curved space-time So the clock on the satellite are made to tick slowerbrbrNear relativistic speeds time flows slower for the moving object with respect to us The clock on the satellite would need to tick faster Comment from : Khan Ch

7:40 you say Satellite GPS clocks are running faster than clocks on ground, but as high school science taught us, regarding fast moving objects, time slows down Comment from : Mick

Correction: gps do not work on triangulation rather trilateration method Comment from : Maalavs Enchante

JUST in 1 minute but a brief one br youtube/TQuP1RJaQY4 Comment from : Angel Harmana

Very clear and not too complicated Great Comment from : Ehud Benhagai

The video provides a good simple illustrations and a good description of how GPS works The narration of the video is really high quality The accompanying article, "How Does Marine GPS Work?", mentioned in the video (link provided) provides a concise document that corresponds to what is covered in the video Casual Navigation also provides another article, which is a great tutorial on navigation, "What is a nautical mile and why is it used?" Look for the link at the end of the article mentioned above In my opinion, all three are well worth the investment in time Comment from : Don Hill

Jeez here I was thinking my phone just measures three different boops from giant radios in earth orbit You've clarified GPS to be quite more complicated! Comment from : Alexander Kirk

do ou know algorithm? How reciever knows the total wave travel timeeven though there is one way signal transmission? Comment from : lobo

Very good explanation Comment from : Carlos Enrique Hernandez Simoes

Time ticks slower for a fast moving object Otherwise, good video Comment from : I have a name now

Such a good explanation manbrThanks a lot It was very helpful👍 Comment from : Rohit Jadhav

which formula/method is used by GPS to calculate Altitude of a airplane?? Comment from : gurpreet Gagan

I stumbled on to your videos and found them extremely interesting I subscribed to your channel and look forward to seeing all your videos You do a great job at explaining things visually and verbally! Keep up the great job you're doing Comment from : Lawrence Maduras

Link you provided in the description is not working Comment from : Manvi chhetri Riya

I have searched every video on YouTube for GPS but this one is best excellent explanation good voice and animation very easy to understand keep it up bro Comment from : DEXTER

You cleared my all doubts Thank you Comment from : Gaurav Kumar Beniwal [IIT-GUWAHATI]

FYI: if you see a clock running FASTER than your own, that's not due to speed Special relativity is symmetrical, as motion is relative, every observer thinks they are standing still So every observer sees other objects' clocks running at the same speed (when stationary relative to them) or slower (when moving in some direction) The faster clocks come from being farther up from the gravity well, which is general relativity Comment from : ciCCapROSTi

Satellites do not exist Comment from : Bird

Worth mentioning that the satellites know their positions because the reverse is happening with ground stations broadcasting their locations to the satellites Comment from : Hippo T

I am sorry but you clearly don't know the basics as there are many factual mistakes, you should research it properly before creating content Comment from : quelorepario

The relativistic time dilation is not only due to the speed (you've got that backwards), but also from the gravitational potential (it is farther away from the earth, with less influence from Earth's gravity) Search about *gravitational time dilation*brLiterally, you head is literally getting older faster than your feetbrThe speed actually would make the clock to slow down (the faster you travel, the slower the time passes, compared to the rest), but the gravitational potential wins (the farther you are from the source of gravity, the faster it goes), so the net effect is that the time in the satellite goes faster than the Earth Comment from : quelorepario

It is not triangulation, it is trilaterationbrThis is a big mistake and commonly misunderstood Comment from : quelorepario

Like here who watching in 2020 Comment from : the SHERLOCK HOLMES

why i cant use GPS in polar water? thanks Comment from : Tsao0203

Talk about one Satellite,brIt look like we thraw a rock in to a cave, it will response an echo and we will count the time to calculate the deepbrBut some body please explain me how Smartphone or Satellite know the that time signal came? (because I think the Smartphone is unable to send any signal back to Satellite) Comment from : Alias Studio

Great video Comment from : am738

If the receiver's battery is depleted its clock will stop working If the battery is recharged later the receiver will work again, but its clock will no longer be synchronized with the sitellite's clocks How do receivers synchronize their clocks with satellite's clocks? Comment from : jugosever

Very clear presentation, thanks Comment from : Juan Manuel Espindola Castro

These video is really helpful sir thanks Comment from : Suresh Malai

i have a research to do on the subject, does anyone have more related articles or books that can help find more information Comment from : naoufal el

Great video, but the link is broken Comment from : Evan C

Thank you Comment from : Janna Barrameda

very good job Comment from : Chaabouni Oussama

It's actually not a ring but sphere Comment from : Kevin McNeill

Now I finally understand Thank you! Comment from : rodent164

what a lie lol people still can't believe this rubbish? Comment from : Obviously

Trilateration not triangulation Comment from : Barrie Norum

I expected the potential errors to include something about the weird shape of the earth (distorted sphere, slightly ovaloid, if I remember correctly) Comment from : Patrik

Not reall was looking for anything just got interested in one of your videos and now I’m stuck here listening to explanations of boats and signalsbrThe best part is that is casual and the edits are simple Comment from : #1 Banana Hater

Darn you, Algebra 😠 turns out there is a real practical use for you Comment from : The Notorious NOE

b*flat earth screeching*/b Comment from : Morgan Carrel

😂 fake Comment from : طُبَيّجْ

I left Endomondo ON after I came home and after 4 hours I did 5 kilometers and burned 600 calories Comment from : oldi184

In an old GPS Navigator I had, I think there was a geodetic correction I had (or could) apply Am I mistaken? Comment from : Edward A

Can someone please explain who this man is? Is he a scientist or doctor? My lord the knowledge is never ending I'd like an answer please Comment from : Tod

Is differential gps still used in plane tracking apps? Comment from : Crypsis

Sir please upload more videos on maritime equipment and operations Which r used on ships at sea thank you 😊🚢 Comment from : Sonam Yadav

This video is bs GPS only works threw land based towers and the internet is connected threw underwater cables It's flat, son Comment from : StrongHolds

Omg Satellites DON'T exist LoL What a load of crap It's all done by antennas here under the dome Comment from : M A

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