Bking:
So why no signal when your at sea or on a plane.
Are you deliberately trying to prove you’re even more stupid?
You get signal at sea if you’re stood on deck. If you can stand outside a plane you’d get one there as well. Radio signals tend not to travel too well through solid metal. The ships and planes themselves don’t have a problem because they’ve got external GPS antennas.
How come these “satellites” never need maintenance,how come they never get struck by micro meteors,how come their batteries never fail(and before you give me some crap about solar panels if they are in geosynchronous orbit they must be in the dark half the time)How do they put them in orbit,these things dont have engines and the “shuttle” only goes up to 400 miles,How do they maintain a none decaying orbit without engines not just over weeks but 20 years.Why does your phone have to be within 10 km of a cell mast to have an operational signal yet these little “wonders” can transmit over thousands of kilometers at less than one kilowatt to the same device.Cell masts transmit at 100 times this power(look at the cables that power them)yet only have a range of 10km.Why would the American military provide all this for "free."Why is their no “sat nav” signal in the Sahara,Gobi or Atacama deserts.Why can you have 2 different devices in the same truck giving different speeds if they are “accurate” to 1 meter.Both working off the same satellites or maybe different cell net providers towers?Why does Google earth turn into a CGI image above a set height.If its a view from a “satellite” why cant it be a picture.
Jesus ■■■■■■■ christ there’s some monumental stupid there.
Deep breath…
They don’t need maintenance because they’re disposible. They get replaced when they fail. Whilst some are in the dark, not all are in the dark at the same time and as long as at least two and ideally three are above the radio horizon then GPS continues to work. They get put in orbit by all kinds of space vehicles, not just the Shuttle. They have small engines on them to keep them in position.
In regards to the radio signal, I have confirmed contacts on HF to Argentina, 7500 miles away, with just 1 watt. The noise floor at VHF and above is far lower than at HF so you can do it with an even weaker signal as you’ve not got at least -120dBm of noise to get through. Cell masts have a far greater range than 10km - my friend is sending internet access from one tower at Octon where Orange has their gear on to another tower at Caistor for his trunk radio system and that is linking to a tower at Sheffield 53 miles away using 5Ghz for a distance of and far less power than Orange. What doesn’t have a far greater range than 10km is the ■■■■■■■ mobile phone you’re using because if it did you’d not be able to make calls due to the power levels meaning the RF power density when you have it next to your head would cause you injury.
The American military provide it for free because at the end of the day someone would crack it and its one of those things that is in the interest of everyone, the same as the internet which was started by DARPA. There are Satnav signals in the Sahara and Gobi deserts.
You have devices giving two different speeds precisely because their accuracy is to 1 metre. If it was accurate to a millimeter they’d read the same.
Google images doesn’t change to CGI above a set height, it changes to it BELOW a set height because they use it to show hi-res 3D images of specific buildings and other detail - something which they’ve been doing for ages.
Are you going for dumbest person on trucknet award?
Edit: Just read your follow up dumbass post.
VHF and above signals are line of sight and do not travel well through buildings. If the position of the GPS satellites are such that there is a solid object like buildings or mountains or even the body of a plane or the hull of a ship between you and the satellites then you don’t get a signal from them. There are only 24 active satellites at any one time placed in 6 orbital planes 60 degrees apart hence you can get areas such as city centres where driving around the buildings can block the signals without them needing to be 26000km high given the 60 degree spacing. I’ll add basic geometry to the list of things you don’t know anything about.
