In a post apocalypse world, with no power and few survivors, would Satnav still work?How long will technology...
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In a post apocalypse world, with no power and few survivors, would Satnav still work?
How long will technology (satellites, GPS, Cell Phone) still work after civilization is destroyed?Will there be inflation in post apocalypse world?How fast might a post apocalyptic world recover if the survivors co-operated?Replacing power plants post-apocalypseProduction of ammo in post-apocalypse - problems and solutionsGenerating and storing power in a post-apocalyptic worldHow to deal with “menstruation” during the post apocalypse?How in a post nuclear apocalypse setting could a group of survivors set up a “Internet” or “Internet-like” service?How to go with “convert and convince” tactic in post-apocalypse settings?How might a group (with an electrical engineer) restore downed power lines post-apocalypse?How to erase the cultural memory of post-apocalypse survivors
$begingroup$
This question will be badly articulated because I don't understand modern technology in the slightest, so please bear with me...
Assuming;
- there was no power, so there was no web/internet
- you had a mobile phone (one of the smart ones, not a basic one) powered by solar
- the phone had maps downloaded on to its memory card (so you were not reliant on the internet for map access),
could you still use satnav?
My rudimentary understanding is that satnav works through orbiting satellites constantly pinging down their location enabling you to exactly pinpoint where you are on the earths surface. Without the internet, could your phone still access this, or is the internet still needed?
technology post-apocalypse
edited 2 hours ago
Alexander
21k53383
asked 3 hours ago
janejane
161
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
This question will be badly articulated because I don't understand modern technology in the slightest, so please bear with me...
Assuming;
- there was no power, so there was no web/internet
- you had a mobile phone (one of the smart ones, not a basic one) powered by solar
- the phone had maps downloaded on to its memory card (so you were not reliant on the internet for map access),
could you still use satnav?
My rudimentary understanding is that satnav works through orbiting satellites constantly pinging down their location enabling you to exactly pinpoint where you are on the earths surface. Without the internet, could your phone still access this, or is the internet still needed?
technology post-apocalypse
edited 2 hours ago
Alexander
21k53383
asked 3 hours ago
janejane
161
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
2
$begingroup$
In a post-apocalypse world. would the maps be useful anyway? Key bridges would be gone. Craters would replace major highway interchanges. Old maps won't show where the Cannibal Tribes now are, nor the high-radiation zones to avoid. Some rivers may have changed course.
$endgroup$
– user535733
3 hours ago
$begingroup$
Related: How long will technology (satellites, GPS, Cell Phone) still work after civilization is destroyed?
$endgroup$
– Alexander
2 hours ago
add a comment |
$begingroup$
This question will be badly articulated because I don't understand modern technology in the slightest, so please bear with me...
Assuming;
- there was no power, so there was no web/internet
- you had a mobile phone (one of the smart ones, not a basic one) powered by solar
- the phone had maps downloaded on to its memory card (so you were not reliant on the internet for map access),
could you still use satnav?
My rudimentary understanding is that satnav works through orbiting satellites constantly pinging down their location enabling you to exactly pinpoint where you are on the earths surface. Without the internet, could your phone still access this, or is the internet still needed?
technology post-apocalypse
edited 2 hours ago
Alexander
21k53383
asked 3 hours ago
janejane
161
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
This question will be badly articulated because I don't understand modern technology in the slightest, so please bear with me...
Assuming;
- there was no power, so there was no web/internet
- you had a mobile phone (one of the smart ones, not a basic one) powered by solar
- the phone had maps downloaded on to its memory card (so you were not reliant on the internet for map access),
could you still use satnav?
My rudimentary understanding is that satnav works through orbiting satellites constantly pinging down their location enabling you to exactly pinpoint where you are on the earths surface. Without the internet, could your phone still access this, or is the internet still needed?
technology post-apocalypse
technology post-apocalypse
edited 2 hours ago
Alexander
21k53383
asked 3 hours ago
janejane
161
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
Alexander
21k53383
asked 3 hours ago
janejane
161
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
Alexander
21k53383
edited 2 hours ago
Alexander
21k53383
edited 2 hours ago
Alexander
21k53383
21k53383
asked 3 hours ago
janejane
161
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
janejane
161
asked 3 hours ago
janejane
161
161
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
jane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
$begingroup$
In a post-apocalypse world. would the maps be useful anyway? Key bridges would be gone. Craters would replace major highway interchanges. Old maps won't show where the Cannibal Tribes now are, nor the high-radiation zones to avoid. Some rivers may have changed course.
$endgroup$
– user535733
3 hours ago
$begingroup$
Related: How long will technology (satellites, GPS, Cell Phone) still work after civilization is destroyed?
$endgroup$
– Alexander
2 hours ago
add a comment |
2
$begingroup$
In a post-apocalypse world. would the maps be useful anyway? Key bridges would be gone. Craters would replace major highway interchanges. Old maps won't show where the Cannibal Tribes now are, nor the high-radiation zones to avoid. Some rivers may have changed course.
$endgroup$
– user535733
3 hours ago
$begingroup$
Related: How long will technology (satellites, GPS, Cell Phone) still work after civilization is destroyed?
$endgroup$
– Alexander
2 hours ago
2
2
$begingroup$
In a post-apocalypse world. would the maps be useful anyway? Key bridges would be gone. Craters would replace major highway interchanges. Old maps won't show where the Cannibal Tribes now are, nor the high-radiation zones to avoid. Some rivers may have changed course.
$endgroup$
– user535733
3 hours ago
$begingroup$
In a post-apocalypse world. would the maps be useful anyway? Key bridges would be gone. Craters would replace major highway interchanges. Old maps won't show where the Cannibal Tribes now are, nor the high-radiation zones to avoid. Some rivers may have changed course.
$endgroup$
– user535733
3 hours ago
$begingroup$
Related: How long will technology (satellites, GPS, Cell Phone) still work after civilization is destroyed?
$endgroup$
– Alexander
2 hours ago
$begingroup$
Related: How long will technology (satellites, GPS, Cell Phone) still work after civilization is destroyed?
$endgroup$
– Alexander
2 hours ago
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
No, the internet is not needed for a GPS-based device to calculate location.
However, the constellation of satellites requires regular maintenance and replacement. Without it, the constellation will begin to fail within a couple years, and GPS coverage will become increasingly spotty. There are multiple SATNAV systems in orbit - GPS was the first and is still the most popular. The others have the same requirement for regular maintenance and replacement.
Location means just that - a unique latitude/longitude spot on the Earth. Without a database of paths and other locations, that is of limited use to folks. Standalone GPS devices have the database pre-programmed. Phones download databases of varying sizes and uses from the internet.
There are easy alternatives: You can just follow the highway signs and use paper maps, the way everybody successfully navigated before 2000-or-so.
answered 3 hours ago
user535733user535733
9,25921941
$endgroup$
$begingroup$
Thank you, that's really helpful. I posed the question because of a specific scene in a novel I'm in the middle of. Post-apocolyptic, a person alone, using maps for navigation, but gets lost from taking a wrong turn. Its sunset, and they need to hole up for the night and quickly. They fire up their mobile phone and prays for the intermitant satnav to work (it often doesn't). It does (hurrah!) and they are able to zoom in on their immediate location and find the closest houses.
$endgroup$
– jane
2 hours ago
$begingroup$
@jane - Hi and welcome to Worldbuilding! I'll just point out the correct spelling of 'apocalyptic' . Hope that's useful :-)
$endgroup$
– chasly from UK
2 hours ago
add a comment |
$begingroup$
First, we must assume that the GPS (or Galileo) satellite constellation is intact, and the satellites have not been shot down as part of the apocalyptic events in your world, and have not been subjected to EMP from nuclear blasts. If all is working up there, then they can continue to transmit their signals, which are nothing more than very accurate clocks (plus an almanac of where every satellite in the constellation is supposed to be).
Down on the ground, you have a device (smart-phone or standalone GPS) that is battery-powered, and a means of charging it. The complicated maths that allows GPS to work operates entirely on board this device. Comparing the time signals from multiple satellites and using the minute (ie pico-seconds) differences (which exist due to the speed of light) to derive a geolocation co-ordinate, is all done on-board your device.
Once the co-ordinate has been calculated, it can be compared against the index of a map stored on your device and voila, you know where you are. You can then use your choice of algorithm to calculate the best route to another location in that index, also done entirely on-board the device.
In summary, Yes, SatNav would still work. However, as has been said in comments and other answers, without replacement satellites, and continual updates to both the satellite orbits (and/or the almanacs they transmit) and to the maps on your device, the accuracy and usefulness of the navigation will degrade rather quickly, within a matter of years at best.
answered 2 hours ago
EvoGamerEvoGamer
1214
$endgroup$
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
No, the internet is not needed for a GPS-based device to calculate location.
However, the constellation of satellites requires regular maintenance and replacement. Without it, the constellation will begin to fail within a couple years, and GPS coverage will become increasingly spotty. There are multiple SATNAV systems in orbit - GPS was the first and is still the most popular. The others have the same requirement for regular maintenance and replacement.
Location means just that - a unique latitude/longitude spot on the Earth. Without a database of paths and other locations, that is of limited use to folks. Standalone GPS devices have the database pre-programmed. Phones download databases of varying sizes and uses from the internet.
There are easy alternatives: You can just follow the highway signs and use paper maps, the way everybody successfully navigated before 2000-or-so.
answered 3 hours ago
user535733user535733
9,25921941
$endgroup$
$begingroup$
Thank you, that's really helpful. I posed the question because of a specific scene in a novel I'm in the middle of. Post-apocolyptic, a person alone, using maps for navigation, but gets lost from taking a wrong turn. Its sunset, and they need to hole up for the night and quickly. They fire up their mobile phone and prays for the intermitant satnav to work (it often doesn't). It does (hurrah!) and they are able to zoom in on their immediate location and find the closest houses.
$endgroup$
– jane
2 hours ago
$begingroup$
@jane - Hi and welcome to Worldbuilding! I'll just point out the correct spelling of 'apocalyptic' . Hope that's useful :-)
$endgroup$
– chasly from UK
2 hours ago
add a comment |
$begingroup$
No, the internet is not needed for a GPS-based device to calculate location.
However, the constellation of satellites requires regular maintenance and replacement. Without it, the constellation will begin to fail within a couple years, and GPS coverage will become increasingly spotty. There are multiple SATNAV systems in orbit - GPS was the first and is still the most popular. The others have the same requirement for regular maintenance and replacement.
Location means just that - a unique latitude/longitude spot on the Earth. Without a database of paths and other locations, that is of limited use to folks. Standalone GPS devices have the database pre-programmed. Phones download databases of varying sizes and uses from the internet.
There are easy alternatives: You can just follow the highway signs and use paper maps, the way everybody successfully navigated before 2000-or-so.
answered 3 hours ago
user535733user535733
9,25921941
$endgroup$
$begingroup$
Thank you, that's really helpful. I posed the question because of a specific scene in a novel I'm in the middle of. Post-apocolyptic, a person alone, using maps for navigation, but gets lost from taking a wrong turn. Its sunset, and they need to hole up for the night and quickly. They fire up their mobile phone and prays for the intermitant satnav to work (it often doesn't). It does (hurrah!) and they are able to zoom in on their immediate location and find the closest houses.
$endgroup$
– jane
2 hours ago
$begingroup$
@jane - Hi and welcome to Worldbuilding! I'll just point out the correct spelling of 'apocalyptic' . Hope that's useful :-)
$endgroup$
– chasly from UK
2 hours ago
add a comment |
$begingroup$
No, the internet is not needed for a GPS-based device to calculate location.
However, the constellation of satellites requires regular maintenance and replacement. Without it, the constellation will begin to fail within a couple years, and GPS coverage will become increasingly spotty. There are multiple SATNAV systems in orbit - GPS was the first and is still the most popular. The others have the same requirement for regular maintenance and replacement.
Location means just that - a unique latitude/longitude spot on the Earth. Without a database of paths and other locations, that is of limited use to folks. Standalone GPS devices have the database pre-programmed. Phones download databases of varying sizes and uses from the internet.
There are easy alternatives: You can just follow the highway signs and use paper maps, the way everybody successfully navigated before 2000-or-so.
answered 3 hours ago
user535733user535733
9,25921941
$endgroup$
No, the internet is not needed for a GPS-based device to calculate location.
However, the constellation of satellites requires regular maintenance and replacement. Without it, the constellation will begin to fail within a couple years, and GPS coverage will become increasingly spotty. There are multiple SATNAV systems in orbit - GPS was the first and is still the most popular. The others have the same requirement for regular maintenance and replacement.
Location means just that - a unique latitude/longitude spot on the Earth. Without a database of paths and other locations, that is of limited use to folks. Standalone GPS devices have the database pre-programmed. Phones download databases of varying sizes and uses from the internet.
There are easy alternatives: You can just follow the highway signs and use paper maps, the way everybody successfully navigated before 2000-or-so.
answered 3 hours ago
user535733user535733
9,25921941
edited 3 hours ago
answered 3 hours ago
user535733user535733
9,25921941
answered 3 hours ago
user535733user535733
9,25921941
answered 3 hours ago
user535733user535733
9,25921941
9,25921941
$begingroup$
Thank you, that's really helpful. I posed the question because of a specific scene in a novel I'm in the middle of. Post-apocolyptic, a person alone, using maps for navigation, but gets lost from taking a wrong turn. Its sunset, and they need to hole up for the night and quickly. They fire up their mobile phone and prays for the intermitant satnav to work (it often doesn't). It does (hurrah!) and they are able to zoom in on their immediate location and find the closest houses.
$endgroup$
– jane
2 hours ago
$begingroup$
@jane - Hi and welcome to Worldbuilding! I'll just point out the correct spelling of 'apocalyptic' . Hope that's useful :-)
$endgroup$
– chasly from UK
2 hours ago
add a comment |
$begingroup$
Thank you, that's really helpful. I posed the question because of a specific scene in a novel I'm in the middle of. Post-apocolyptic, a person alone, using maps for navigation, but gets lost from taking a wrong turn. Its sunset, and they need to hole up for the night and quickly. They fire up their mobile phone and prays for the intermitant satnav to work (it often doesn't). It does (hurrah!) and they are able to zoom in on their immediate location and find the closest houses.
$endgroup$
– jane
2 hours ago
$begingroup$
@jane - Hi and welcome to Worldbuilding! I'll just point out the correct spelling of 'apocalyptic' . Hope that's useful :-)
$endgroup$
– chasly from UK
2 hours ago
$begingroup$
Thank you, that's really helpful. I posed the question because of a specific scene in a novel I'm in the middle of. Post-apocolyptic, a person alone, using maps for navigation, but gets lost from taking a wrong turn. Its sunset, and they need to hole up for the night and quickly. They fire up their mobile phone and prays for the intermitant satnav to work (it often doesn't). It does (hurrah!) and they are able to zoom in on their immediate location and find the closest houses.
$endgroup$
– jane
2 hours ago
$begingroup$
Thank you, that's really helpful. I posed the question because of a specific scene in a novel I'm in the middle of. Post-apocolyptic, a person alone, using maps for navigation, but gets lost from taking a wrong turn. Its sunset, and they need to hole up for the night and quickly. They fire up their mobile phone and prays for the intermitant satnav to work (it often doesn't). It does (hurrah!) and they are able to zoom in on their immediate location and find the closest houses.
$endgroup$
– jane
2 hours ago
$begingroup$
@jane - Hi and welcome to Worldbuilding! I'll just point out the correct spelling of 'apocalyptic' . Hope that's useful :-)
$endgroup$
– chasly from UK
2 hours ago
$begingroup$
@jane - Hi and welcome to Worldbuilding! I'll just point out the correct spelling of 'apocalyptic' . Hope that's useful :-)
$endgroup$
– chasly from UK
2 hours ago
add a comment |
$begingroup$
First, we must assume that the GPS (or Galileo) satellite constellation is intact, and the satellites have not been shot down as part of the apocalyptic events in your world, and have not been subjected to EMP from nuclear blasts. If all is working up there, then they can continue to transmit their signals, which are nothing more than very accurate clocks (plus an almanac of where every satellite in the constellation is supposed to be).
Down on the ground, you have a device (smart-phone or standalone GPS) that is battery-powered, and a means of charging it. The complicated maths that allows GPS to work operates entirely on board this device. Comparing the time signals from multiple satellites and using the minute (ie pico-seconds) differences (which exist due to the speed of light) to derive a geolocation co-ordinate, is all done on-board your device.
Once the co-ordinate has been calculated, it can be compared against the index of a map stored on your device and voila, you know where you are. You can then use your choice of algorithm to calculate the best route to another location in that index, also done entirely on-board the device.
In summary, Yes, SatNav would still work. However, as has been said in comments and other answers, without replacement satellites, and continual updates to both the satellite orbits (and/or the almanacs they transmit) and to the maps on your device, the accuracy and usefulness of the navigation will degrade rather quickly, within a matter of years at best.
answered 2 hours ago
EvoGamerEvoGamer
1214
$endgroup$
add a comment |
$begingroup$
First, we must assume that the GPS (or Galileo) satellite constellation is intact, and the satellites have not been shot down as part of the apocalyptic events in your world, and have not been subjected to EMP from nuclear blasts. If all is working up there, then they can continue to transmit their signals, which are nothing more than very accurate clocks (plus an almanac of where every satellite in the constellation is supposed to be).
Down on the ground, you have a device (smart-phone or standalone GPS) that is battery-powered, and a means of charging it. The complicated maths that allows GPS to work operates entirely on board this device. Comparing the time signals from multiple satellites and using the minute (ie pico-seconds) differences (which exist due to the speed of light) to derive a geolocation co-ordinate, is all done on-board your device.
Once the co-ordinate has been calculated, it can be compared against the index of a map stored on your device and voila, you know where you are. You can then use your choice of algorithm to calculate the best route to another location in that index, also done entirely on-board the device.
In summary, Yes, SatNav would still work. However, as has been said in comments and other answers, without replacement satellites, and continual updates to both the satellite orbits (and/or the almanacs they transmit) and to the maps on your device, the accuracy and usefulness of the navigation will degrade rather quickly, within a matter of years at best.
answered 2 hours ago
EvoGamerEvoGamer
1214
$endgroup$
add a comment |
$begingroup$
First, we must assume that the GPS (or Galileo) satellite constellation is intact, and the satellites have not been shot down as part of the apocalyptic events in your world, and have not been subjected to EMP from nuclear blasts. If all is working up there, then they can continue to transmit their signals, which are nothing more than very accurate clocks (plus an almanac of where every satellite in the constellation is supposed to be).
Down on the ground, you have a device (smart-phone or standalone GPS) that is battery-powered, and a means of charging it. The complicated maths that allows GPS to work operates entirely on board this device. Comparing the time signals from multiple satellites and using the minute (ie pico-seconds) differences (which exist due to the speed of light) to derive a geolocation co-ordinate, is all done on-board your device.
Once the co-ordinate has been calculated, it can be compared against the index of a map stored on your device and voila, you know where you are. You can then use your choice of algorithm to calculate the best route to another location in that index, also done entirely on-board the device.
In summary, Yes, SatNav would still work. However, as has been said in comments and other answers, without replacement satellites, and continual updates to both the satellite orbits (and/or the almanacs they transmit) and to the maps on your device, the accuracy and usefulness of the navigation will degrade rather quickly, within a matter of years at best.
answered 2 hours ago
EvoGamerEvoGamer
1214
$endgroup$
First, we must assume that the GPS (or Galileo) satellite constellation is intact, and the satellites have not been shot down as part of the apocalyptic events in your world, and have not been subjected to EMP from nuclear blasts. If all is working up there, then they can continue to transmit their signals, which are nothing more than very accurate clocks (plus an almanac of where every satellite in the constellation is supposed to be).
Down on the ground, you have a device (smart-phone or standalone GPS) that is battery-powered, and a means of charging it. The complicated maths that allows GPS to work operates entirely on board this device. Comparing the time signals from multiple satellites and using the minute (ie pico-seconds) differences (which exist due to the speed of light) to derive a geolocation co-ordinate, is all done on-board your device.
Once the co-ordinate has been calculated, it can be compared against the index of a map stored on your device and voila, you know where you are. You can then use your choice of algorithm to calculate the best route to another location in that index, also done entirely on-board the device.
In summary, Yes, SatNav would still work. However, as has been said in comments and other answers, without replacement satellites, and continual updates to both the satellite orbits (and/or the almanacs they transmit) and to the maps on your device, the accuracy and usefulness of the navigation will degrade rather quickly, within a matter of years at best.
answered 2 hours ago
EvoGamerEvoGamer
1214
answered 2 hours ago
EvoGamerEvoGamer
1214
answered 2 hours ago
EvoGamerEvoGamer
1214
answered 2 hours ago
EvoGamerEvoGamer
1214
1214
add a comment |
add a comment |
jane is a new contributor. Be nice, and check out our Code of Conduct.
jane is a new contributor. Be nice, and check out our Code of Conduct.
jane is a new contributor. Be nice, and check out our Code of Conduct.
jane is a new contributor. Be nice, and check out our Code of Conduct.
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$begingroup$
In a post-apocalypse world. would the maps be useful anyway? Key bridges would be gone. Craters would replace major highway interchanges. Old maps won't show where the Cannibal Tribes now are, nor the high-radiation zones to avoid. Some rivers may have changed course.
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– user535733
3 hours ago
$begingroup$
Related: How long will technology (satellites, GPS, Cell Phone) still work after civilization is destroyed?
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– Alexander
2 hours ago