5 ms·

If whatever the USA are planing to do is in Europes interest, they can ask to turn Galileo off. If it is really in Europes interest, they will do so.

by madez 10y ago

BoorishBears 10y ago
Localized jamming sounds a lot less disruptive than turning off the system for the entire world.
- madez 10y ago
  You could also turn off Galileo only in some areas.
  - dogma1138 10y ago
    No you can't.
    - madez 10y ago
      Why shouldn't it be possible to turn off only those satellites that are visible in a certain area? I don't see any argument in your favour.
      - dogma1138 10y ago
        Satnav sattelites are not geosynchronous what are you going to do press on and off every time passes over? You do understand that satellites are not light bulbs right?
        madez 10y ago
        Of course you could turn sending the signal on and off depending on the time or where they are.
        dogma1138 10y ago
        A satellite is not a lightbulb.
        Atheros 10y ago
        That's also not a counter argument. Radio transmissions can be turned on and off.
      - robryk 10y ago
        Wouldn't this cripple the system over a much wider area than intended? The are from which a satellite in LEO is visible is ~5000km in diameter.
        dogma1138 10y ago
        Galileo isn't in LEO https://en.wikipedia.org/wiki/Medium_Earth_orbit https://en.wikipedia.org/wiki/Medium_Earth_orbit but yes, shutting off the signal would mean that a radius of about 7000 (GPS sats can be seen across about 6500~ miles depending on the exact orbit and angle, Galileo will have more coverage since they are at a higher orbit, if you really want to know here is how you calculate it http://gis.stackexchange.com/questions/77651/how-to-find-ring-of-coverage-of-gps-satellite-on-wgs-84-ellipsoid http://gis.stackexchange.com/questions/77651/how-to-find-rin...) miles has no SatNav... Jamming can shut down GPS in any range from 10M to 100,000M turning the transmitters of effectively shuts down GPS to half the globe. ]
  - deleted 10y ago
    [deleted]

If whatever the USA are planing to do is in Europes interest, they can ask to turn Galileo off. If it is really in Europes interest, they will do so.

by madez 10y ago

If whatever the USA are planing to do is in Europes interest, they can ask to turn Galileo off. If it is really in Europes interest, they will do so.

BoorishBears 10y ago

Localized jamming sounds a lot less disruptive than turning off the system for the entire world.

madez 10y ago
You could also turn off Galileo only in some areas.
- dogma1138 10y ago
  No you can't.
  - madez 10y ago
    Why shouldn't it be possible to turn off only those satellites that are visible in a certain area? I don't see any argument in your favour.
    - dogma1138 10y ago
      Satnav sattelites are not geosynchronous what are you going to do press on and off every time passes over? You do understand that satellites are not light bulbs right?
      - madez 10y ago
        Of course you could turn sending the signal on and off depending on the time or where they are.
        dogma1138 10y ago
        A satellite is not a lightbulb.
        Atheros 10y ago
        That's also not a counter argument. Radio transmissions can be turned on and off.
    - robryk 10y ago
      Wouldn't this cripple the system over a much wider area than intended? The are from which a satellite in LEO is visible is ~5000km in diameter.
      - dogma1138 10y ago
        Galileo isn't in LEO https://en.wikipedia.org/wiki/Medium_Earth_orbit https://en.wikipedia.org/wiki/Medium_Earth_orbit but yes, shutting off the signal would mean that a radius of about 7000 (GPS sats can be seen across about 6500~ miles depending on the exact orbit and angle, Galileo will have more coverage since they are at a higher orbit, if you really want to know here is how you calculate it http://gis.stackexchange.com/questions/77651/how-to-find-ring-of-coverage-of-gps-satellite-on-wgs-84-ellipsoid http://gis.stackexchange.com/questions/77651/how-to-find-rin...) miles has no SatNav... Jamming can shut down GPS in any range from 10M to 100,000M turning the transmitters of effectively shuts down GPS to half the globe. ]
- deleted 10y ago
  [deleted]