1.8 - Navigation Signals

[@vestajuno]

One of the most clear explanations I found. Excellent work. Thank you very much!

[@peterramsay]

The second noise, "BIP!", scared my dog.

[@harrysvensson2610]

4:55 "You'll have a book of codes in your receiver, and it will say 'OH MY GOODNESS'! I'm looking for..."

[@nelio5757]

Very Good Explanation

[@gyroscopie2648]

very simple an clear explanation

[@wcottee]

How does the receiver "split-the-threads" of the C/A and navigation messages if they are sent at the same time? Does it take advantage of the longer bits in the navigation message? That is, when the navigation sends a "one" is that where the C/A ranging occurs?

[@dadominicanstyl]

Awesome presentation. But my favorite satellite system "GLONASS" 😂 I was dying...

[@jacobseal]

7:00 Damn is that Al Green teaching this lecture???

[@HITESHSHARMA-km2ei]

How long does it take for a GPS signal to reach the earth? Option a- 1/10 b- 1/15 c- 1/20 d- 1/25 Please tell me sir

[@markhu3148]

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[@fehmidonmez7810]

How does a satellite determine the exact speed of an object on Earth while rotating over a circular path at 14,000 kilometers per hour? Wouldn't it be 1000 times cheaper if they use high-altitude atmospheric balloons or land-based towers? A signal sent by a fridge-sized satellite at 20,200 kilometers away and moving at 14,000 kilometers per hour. I can understand why nobody discusses the ridiculous speeds and altitude of these satellites when calculating radio frequencies; otherwise, it wouldn't make sense.

[@coreC..]

I guess it is your personal device (navigation/cellphone) that calculates your own speed. GPS just provides a position (it's in the name). If you are moving in your car, you know your velocity, if you have (at least) 2 positions and the time between aquiring those positions. .. The satellite has a well known orbit. This gentleman explains very well how you can calculate the position of a satellite. It would be difficult to know the exact position of a balloon, floating on the wind. Also, a satellite has a greater range than a balloon. The satellite is 20000 km away, looking down at our planet. A balloon is perhaps at 30+ km altitude (at least a typical waetherballoon pops at just above 30 km altitude). It can not see so much Earth => you would need more balloons than satellites.

[@googlr214]

is it possible to get data of other devices from GPS satellite transmissions?

[@sandhillstudio1487]

The GPS data that is sent by satellites only tells you about the satellite constellation. In that regard, it is only a one-way communication with common civilian devices.

[@francescozanini6383]

21:19

[@jeffm2787]

Anyone watching this video probably doesn't need to be told what Ghz, Mhz, etc. are.