The SBAS (or USA, WAAS; Europe, EGNOS) corrections may be free but your receiver must be SBAS-enabled.We have our own Trimble Base Station and there's...

So, I teach now rather than do many field surveys but did work on inshore & offshore charting, and the hydrographic work in support of the explora...

Hi, everyone. Thanks for your greetings.I've been following via Twitter for some time as the land surveying commentaries are very useful insights for ...

It is possible they are referring to two different observables, i.e. a positioning solution derived from the GPS carrier wave (as in RTK & PPS) an...