[randomdata]

Is that the case? The article suggests that the correction data obtained from the phones is like the correction data obtained from a fixed station. Presumably multiple phones are needed to provide correction data only because those phones are also moving themselves, using many sources to also correct for that movement.

The novel part seems to be that they think they can build a business selling correction data back to the customers who provided it to them, not having to rely on third-party fixed base stations or installing their own.

[seagor]

That is accurate - the error correction comes from aggregating measurements from multiple mobile devices instead of using a base station. The goal is to provide the service to mobile app developers who use location based services. They already have relationships with their users and our goals is simply to provide them a better performing location service.