Live data from Hacker News

We built a new GPS receiver engine

blog.coresemi.io

1–10 of 122 posts

Re: We built a new GPS receiver engine

#3
> Well, how about deliberate dilution of precision or intentionally limiting the speed the GPS chip can be used at?

Is that a legal requirement or just done on request? I sort of chuckle whenever I hear of limitations like that being put in place as if someone that can construct an ICBM is going to be constrained by the GPS module.

Re: We built a new GPS receiver engine

#4

> Well, how about deliberate dilution of precision or intentionally limiting the speed the GPS chip can be used at? Is that a legal requirement or just done on request? I sort of chuckle whenever I hear of limitations like that being put in place as if someone that can construct an ICBM is going to be constrained by the GPS module.

It was required. But that was gotten rid of by the Clinton administration. See https://www.gps.gov/systems/gps/modernization/sa/ .

Re: We built a new GPS receiver engine

#6

> Well, how about deliberate dilution of precision or intentionally limiting the speed the GPS chip can be used at? Is that a legal requirement or just done on request? I sort of chuckle whenever I hear of limitations like that being put in place as if someone that can construct an ICBM is going to be constrained by the GPS module.

The speed limit in the US is 1000mph, else it’s a munition.

I believe the US used to make their GPS slightly inaccurate, but this was done on the satellite side.

Re: We built a new GPS receiver engine

#8

> Well, how about deliberate dilution of precision or intentionally limiting the speed the GPS chip can be used at? Is that a legal requirement or just done on request? I sort of chuckle whenever I hear of limitations like that being put in place as if someone that can construct an ICBM is going to be constrained by the GPS module.

We always have to get our altitude restrictions removed for various devices for high-altitude balloon flights.

Re: We built a new GPS receiver engine

#10

> Well, how about deliberate dilution of precision or intentionally limiting the speed the GPS chip can be used at? Is that a legal requirement or just done on request? I sort of chuckle whenever I hear of limitations like that being put in place as if someone that can construct an ICBM is going to be constrained by the GPS module.

It was required. But that was gotten rid of by the Clinton administration. See https://www.gps.gov/systems/gps/modernization/sa/ .

[deleted]
Post reply on HN