61–70 of 80 posts
I was curious what Beidou meant, apparently it refers to the "Big Dipper": https://en.wikipedia.org/wiki/BeiDou_Navigation_Satellite_Sy...
Earlier quoted context omitted.
No, the US has never done any blocking in the GPS system. The article refers to a request by India for access to the military GPS signal and military equipment, which was not granted. The US, as well as virtually all other technological powers, does have the capability to jam GPS signals using ground, sea, or air-based jamming platforms but those are not part of the GPS system.
Yup it did - I was flying aerial surveying at the time. Bad timing. Actually I didn't notice anything in the end so was all good but when I saw the NOTAM I couldn't believe my bad luck. Edit - link: https://www.theregister.co.uk/2016/06/07/us_military_testing...
Earlier quoted context omitted.
No, the US has never done any blocking in the GPS system. The article refers to a request by India for access to the military GPS signal and military equipment, which was not granted. The US, as well as virtually all other technological powers, does have the capability to jam GPS signals using ground, sea, or air-based jamming platforms but those are not part of the GPS system.
The United States actually does have the ability to selectively degrade signals. I don't know enough to comment on this capability in more detail (another comment seems to indicate that it is through jamming). A relevant excerpt (from 2000) is below: > Additionally, we have demonstrated the capability to selectively deny GPS signals on a regional basis when our national security is threatened. https://www.faa.gov/abo…
Building your own GNSS system does nothing to protect against electronic warfare platforms.
Earlier quoted context omitted.
You can destroy something without taking it out of orbit. The pieces will happily carry on along their orbital trajectories.
It's easier to put something in orbit than to hit something in orbit.
No one seems to have mentioned that the US has actually blocked GPS signals before for military reasons (during the Kargil war in 1999): https://timesofindia.indiatimes.com/home/science/How-Kargil-... There's a good reason and precedent for China (and others; see GLONASS, IRNSS, Galileo) to be afraid of this.
No, the US has never done any blocking in the GPS system. The article refers to a request by India for access to the military GPS signal and military equipment, which was not granted. The US, as well as virtually all other technological powers, does have the capability to jam GPS signals using ground, sea, or air-based jamming platforms but those are not part of the GPS system.
As well as anyone that has access to basic electronic parts. It's very easy to swamp a 30 watt transmitter that's ten thousand miles away.
Earlier quoted context omitted.
> so in the event of a war the DOD can disable the civilian signal as the M code will work standalone, hence a third party nation cannot rely on GPS. They also had the option in older satellites of turning on selective availability, which would degrade the civilian location service from 5-meter to 100-meter accuracy without affecting the military service. Purportedly newer GPS satellites don't have the option anymore…
> Purportedly newer GPS satellites don't have the option anymore. That does sound suspiciously like something the military would want you to believe
Earlier quoted context omitted.
No, the US has never done any blocking in the GPS system. The article refers to a request by India for access to the military GPS signal and military equipment, which was not granted. The US, as well as virtually all other technological powers, does have the capability to jam GPS signals using ground, sea, or air-based jamming platforms but those are not part of the GPS system.
The United States actually does have the ability to selectively degrade signals. I don't know enough to comment on this capability in more detail (another comment seems to indicate that it is through jamming). A relevant excerpt (from 2000) is below: > Additionally, we have demonstrated the capability to selectively deny GPS signals on a regional basis when our national security is threatened. https://www.faa.gov/abo…
GPS has become so ubiquitous I honestly forgot that it was something that could be owned. It is cool to see some competition in the GPS world.
India did something similar a few months ago. Each country wants to build it's own GPS for military purposes. At some point we have to stop calling it 'Global' Positioning System.
GPS has become so ubiquitous I honestly forgot that it was something that could be owned. It is cool to see some competition in the GPS world.
GPS is aging technology, its satellites are dying already and its limits are showing clearly. It won’t be around forever.