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?
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.
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.
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.
One of the most clear explanations I found. Excellent work. Thank you very much!
4:55 "You'll have a book of codes in your receiver, and it will say 'OH MY GOODNESS'! I'm looking for..."
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?
The second noise, "BIP!", scared my dog.
Very Good Explanation
21:19
very simple an clear explanation
7:00 Damn is that Al Green teaching this lecture???
is it possible to get data of other devices from GPS satellite transmissions?
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.
Awesome presentation. But my favorite satellite system "GLONASS" 😂 I was dying...
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
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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.
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.
Anyone watching this video probably doesn't need to be told what Ghz, Mhz, etc. are.