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I beg to disagree. My phones have all gotten a lock on planes so far.

by ce4 8y ago

mynameisvlad 8y ago
Planes don’t usually reach the limits, but they exist. The limits seem to be 1200mph or 59000ft altitude. https://en.m.wikipedia.org/wiki/CoCom https://en.m.wikipedia.org/wiki/CoCom
- njarboe 8y ago
  1200mph and 59000ft altitude
  - ProblemFactory 8y ago
    Unfortunately many cheap GPS chips use the (incorrect) or definition, not and. It was a pain to find one that works above 59000ft but very slow speed for a weather balloon project some years ago.
thermodynthrway 8y ago
The limits are higher altitude and faster speed then you've ever been. If the Concorde was around you would see it firsthand. Weapons would be worthless against first world defences at airliner height and speed. Gps receivers shut down on weather balloons regularly, it's a known issue The limits are real, encoded in public law. I don't understand how you could possibly disagree with me on this point
- ce4 8y ago
  Ignore the comment above, obviously ignorance :) Thanks for explaining.
  - thermodynthrway 8y ago
    It's okay, I was wrong about what the limits are too. They've been increased a lot
njarboe 8y ago
I like using a NSF funded mobile app "Flyover Country" [1] to identify features in the landscape when I fly. You can download the maps and data for you flight path a head of time and then use it in airplane mode on the plane. GPS works fine (by the window) and the app locates your position on the map. https://flyovercountry.io/ https://flyovercountry.io/
sannee 8y ago
The reason your GPS receiver does not work on a plane is likely because it's processing algorithms aren't tuned for those speeds. The popular Ublox NEO-6M for example needs to be explicitly switched to "airborne" mode. The fact that you are enclosed in a faraday cage also isn't helping, but they make planes from plastic now, so this shouldn't always be the case.
SmellyGeekBoy 8y ago
Odd that you'd think that aircraft would be covered by these restrictions considering the fact that they use GPS to navigate.
- itsameta4 8y ago
  There's not a ton of civilian craft cruising about at nearly Mach 2.

I beg to disagree. My phones have all gotten a lock on planes so far.

by ce4 8y ago

I beg to disagree. My phones have all gotten a lock on planes so far.

Planes don’t usually reach the limits, but they exist. The limits seem to be 1200mph or 59000ft altitude. https://en.m.wikipedia.org/wiki/CoCom https://en.m.wikipedia.org/wiki/CoCom

njarboe 8y ago
1200mph and 59000ft altitude
- ProblemFactory 8y ago
  Unfortunately many cheap GPS chips use the (incorrect) or definition, not and. It was a pain to find one that works above 59000ft but very slow speed for a weather balloon project some years ago.

thermodynthrway 8y ago

The limits are higher altitude and faster speed then you've ever been. If the Concorde was around you would see it firsthand. Weapons would be worthless against first world defences at airliner height and speed. Gps receivers shut down on weather balloons regularly, it's a known issue The limits are real, encoded in public law. I don't understand how you could possibly disagree with me on this point

ce4 8y ago
Ignore the comment above, obviously ignorance :) Thanks for explaining.
- thermodynthrway 8y ago
  It's okay, I was wrong about what the limits are too. They've been increased a lot

njarboe 8y ago

I like using a NSF funded mobile app "Flyover Country" [1] to identify features in the landscape when I fly. You can download the maps and data for you flight path a head of time and then use it in airplane mode on the plane. GPS works fine (by the window) and the app locates your position on the map. https://flyovercountry.io/ https://flyovercountry.io/

sannee 8y ago

The reason your GPS receiver does not work on a plane is likely because it's processing algorithms aren't tuned for those speeds. The popular Ublox NEO-6M for example needs to be explicitly switched to "airborne" mode. The fact that you are enclosed in a faraday cage also isn't helping, but they make planes from plastic now, so this shouldn't always be the case.

SmellyGeekBoy 8y ago

Odd that you'd think that aircraft would be covered by these restrictions considering the fact that they use GPS to navigate.

itsameta4 8y ago
There's not a ton of civilian craft cruising about at nearly Mach 2.