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RTK GPS Recommendations

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DamEng1

Civil/Environmental
Joined
Nov 21, 2007
Messages
19
Location
US
We're looking to upgrade from our antiquatated Trimble 4800 gps system to something more modern and I was wandering if anyone had suggestions. I am interested in either a Trimble or Tocon unit with a cellular modem but other than that I am kinda lost on what I really need. The primary use of the system will be surveys of infrastructure downstream of dams such as roadway crossings, FFE's, etc. in which I am primarily interested in the elevation.
 
How accurately do you really need elevation? GPS elevation accuracy is not its strong suite.

TTFN

FAQ731-376
 
Within a couple tenths would be satisfactory.
 
"couple tenths" of WHAT? furlongs? fortnights?

TTFN

FAQ731-376
 
Sorry... of a foot.
 
Cellular modems are great, as long as you have a signal. Any deep rural assignment you'll likley want to keep a hold of the old Trimble and Bluebrick radio.

I'd say to investigate a unit that is compatible with your total station equipment and data collector for that. Not a requirement, but tends to make life easier on a crew that has to switch between the two.
 
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