4 ms·
GPS is ideally quite redundant, and the data from it is usable without an internet connection. GPS is fine.
by mathgradthrow 3y ago
GPS is ideally quite redundant, and the data from it is usable without an internet connection. GPS is fine.
- kube-system 3y agoCivilian GPS is not accurate enough for precision farming which is why these tractor manufacturers in my above link were using Inmarsat L-band to transmit correction information in addition to using GPS. https://en.wikipedia.org/wiki/StarFire_(navigation_system) https://en.wikipedia.org/wiki/StarFire_(navigation_system)
- mathgradthrow 3y agoI'm even less worried about the security of military GPS.
- kube-system 3y agoI don't know what that has to do with this topic. Starfire (and similar) farm tractor guidance systems are not that. Zero farm tractors use military GPS.
- sadhorse 3y agoIt can also be done locally with a fixed base station.
- sgtnoodle 3y agoI imagine a mostly autonomous land vehicle relying on GPS would also require RTK GPS, which does require an external source of the data. Some GPS receivers can receive that from satellites, but the data is encrypted and requires expensive commercial licenses or military grade equipment.
- BenjiWiebe 3y agoYou can generate your own correction data for GPS, using a fixed base station, and relaying the data over a radio link or through the cell network. Look up ArduSimple if interested how. Something like $400 IIRC (for the base station). Source: we are doing it, using AgOpenGPS (OSS autosteer) with RTK
- sgtnoodle 3y agoOh I know. I've plumbed RTCM3 streams over radios and cell networks aplenty as well. There's a real cost to setting up and maintaining a base station properly, though. Subscribing to a service is attractive if you're only operating a small fleet, which is sort of the point?