The U.S. Department of Commerce requires that all exportable GPS products contain performance limitations so that they cannot be used in a manner that could threaten the security of the United States. The following limitations are implemented on the Trimble…
What does the actual real time computation? The phone or the GPS chipset?
Seems some people think accuracy is limited. That’s not the case. From the article:
Immediate access to satellite measurements and navigation results is disabled when the receiver’s velocity is computed to be greater than 1000 knots, or its altitude is computed to be above 18,000 meters. The receiver continuously resets until the COCOM situation is cleared.
The limitations are enforced by the GPS receiver itself. You can buy “unlocked” GPS modules without these limitations, but they’re harder to get ahold of.
Seems some people think accuracy is limited. That’s not the case. From the article:
The limitations are enforced by the GPS receiver itself. You can buy “unlocked” GPS modules without these limitations, but they’re harder to get ahold of.