we will soon discover the long awaited johnny mnemonic particle tying together all the fundamental forces and big bangology..perhaps silly string theory too...
@HiAdrian If I understand you correctly, you are saying that GPS and civilian satellites are receive-only? What is the use of a receive-only communication device? Do you know what "communication" is? Data in -> data process -> data out.
@HiAdrian The GPS device in your car do send signals to the satellite, and the satellite processes this information and send it back to the GPS device.
@iasedu To my understanding, the GPS satellites bombard the earth with their position information, and ground devices derive their own location purely through trilateration of multiple signals. So i think it's one-way, like e.g. DVB-S signals.
I think the satellites might be overwhelmed if they had to deal with the upstream of all the devices below them.
@HiAdrian But the GPS device in your car needs to know when any received signal was sent. So to my understanding, the GPS device sends a device ID code to the satellite, and the satellite sends back the time, location, and time of received signal... But I'm not sure, to be honest.
@iasedu No worries. I was just surprised about the way he presented it; he clearly put time into preparing his presentation and the far more tricky relativity-effects on GPS.
@HiAdrian I'm glad that you spotted that too. I had to give my head a shake when he said, or at least implied, that my GPS receiver actually transmits to a satellite.
Our time in our universe is probably totally different from the time outside this universe. For all we know 20 years outside our universe is 13.7 billion years inside our universe.
<3 that part bout earth trying to stay in a straight line
yumnaization 8 hours ago
a priori bullshit~
stephentsang2000 20 hours ago
Comment removed
danrcastro 3 weeks ago
i used to go time traveling but i took an arrow on my knee!!!
guigsb 2 months ago
Neutrino. Knock, Knock. Who's There?
ArcadeGames 3 months ago 5
@NothingFancyJustGus We all bed space, all the time, and you can't stop it!
iasedu 3 months ago
@iasedu YEP! all things that have mass BEND space, and since space and time are intertwined, we also bend TIME as well. Proof? GPS. That is all.
bunnyluve 1 month ago
im the 420th view. haha
bprluva 3 months ago
we will soon discover the long awaited johnny mnemonic particle tying together all the fundamental forces and big bangology..perhaps silly string theory too...
joeglimmix 3 months ago
37:02 not correct; GPS and practically all civilian satellite usage is receive-only (with the exception of things like Iridium).
HiAdrian 4 months ago
@HiAdrian You are joking, right?
iasedu 4 months ago
@iasedu What do you mean? It's not a minor detail/difference.
HiAdrian 4 months ago
@HiAdrian If I understand you correctly, you are saying that GPS and civilian satellites are receive-only? What is the use of a receive-only communication device? Do you know what "communication" is? Data in -> data process -> data out.
iasedu 4 months ago
@iasedu Satellite usage, I meant the user on the ground. He seems to state that it's a 2-way mechanism.
HiAdrian 4 months ago
@HiAdrian The GPS device in your car do send signals to the satellite, and the satellite processes this information and send it back to the GPS device.
iasedu 4 months ago
@iasedu To my understanding, the GPS satellites bombard the earth with their position information, and ground devices derive their own location purely through trilateration of multiple signals. So i think it's one-way, like e.g. DVB-S signals.
I think the satellites might be overwhelmed if they had to deal with the upstream of all the devices below them.
HiAdrian 4 months ago
@HiAdrian But the GPS device in your car needs to know when any received signal was sent. So to my understanding, the GPS device sends a device ID code to the satellite, and the satellite sends back the time, location, and time of received signal... But I'm not sure, to be honest.
iasedu 4 months ago
@HiAdrian I think you might be correct here, the satellites do bombard the earth with time of sent signal and location. Sorry.
iasedu 4 months ago
@iasedu No worries. I was just surprised about the way he presented it; he clearly put time into preparing his presentation and the far more tricky relativity-effects on GPS.
HiAdrian 4 months ago
@HiAdrian I'm glad that you spotted that too. I had to give my head a shake when he said, or at least implied, that my GPS receiver actually transmits to a satellite.
deedubya286 1 month ago
Our time in our universe is probably totally different from the time outside this universe. For all we know 20 years outside our universe is 13.7 billion years inside our universe.
ThermalHD 4 months ago
There was a young lady name Bright
who traveled far faster than light.
She left one day,
in a relative way,
and returned the previous night.
tunghoy 4 months ago