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VRS network subscriptions
in my 1st job, we set up a base stations, then used rovers that recieved signal from the base station radio antenna. the job im in now, we use just the rover, hotspot to an internet device, which connects to the base network (presumably the closest base)
my question: does this VRS network decrease accuracy or at the very least, consistency? the reason i ask is bc i remember setting control via the base/rover and being able to then use conventional instruments on those points with 5 hun or less for my deltas. now, with this internet connected rover (vrs) sometimes im 2 tenths off from two points set with the rover when i check with the TS. ive noticed its much more inconsistent, to the point i cant setup jobs anymore with GPS i have to use the TS. anyone have opinions on the VRS???
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7 Replies
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Been using a VRS network for a couple of years now and about 2 months ago I got a base for added capabilities.
I have had fairly decent results with the VRS and have never seen the 2 tenths you are seeing.
Change your mount point so that it connexts to the nearest base and see if that helps.
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Been using a VRS network for a couple of years now and about 2 months ago I got a base for added capabilities.
I have had fairly decent results with the VRS and have never seen the 2 tenths you are seeing.
Change your mount point so that it connexts to the nearest base and see if that helps.
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I’ve been using a network rover and VRS network for the past 5 years. I can say I have had excellent results. My distance checks with the TS have been within hundredths, rarely over a tenth. I have checked into published bench marks, always less than a tenth, usually .03 to .07. I have checked into work I did up to 10 years age with a base and rover set up. Same accuracies there. I have done site calibrations on jobs done with TS and tied several larger jobs together using the network rover. I can say I am very pleased with the results.
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I have only used VRS/Network Rover a few times and the verticals were twice as bad as base/rover. Can I ask those that get good results are you seeing good results in the horizontal and vertical or just horizontal. Also are you mainly working within 20km of the nearest base or are you stretching it out at the limits?
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All depends on the network.
About five years ago a friend at another firm and I went back to a number of conventional static network control points weƒ??d set on multiple projects and observed them with RTN (Leica SmartNet – the old Loyola Network) with no significant difference in results between the original static post processed and adjusted coordinates and the average of two 30 second RTN solutions.
For vertical I once set network pairs at half a dozen sites along a four mile linear project (cross streets along a stream bottom park in DC); then ran digital levels up the conventional traverse along the stream, hitting all the RTN points. Holding a network derived elevation at one end, only one of the other 11 RTN was off more than 2cm vertically.
But this is robust network with a lot of base density and most of the bases in the CORS system and installed/maintained to their standards.
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All depends on the network.
About five years ago a friend at another firm and I went back to a number of conventional static network control points weƒ??d set on multiple projects and observed them with RTN (Leica SmartNet – the old Loyola Network) with no significant difference in results between the original static post processed and adjusted coordinates and the average of two 30 second RTN solutions.
For vertical I once set network pairs at half a dozen sites along a four mile linear project (cross streets along a stream bottom park in DC); then ran digital levels up the conventional traverse along the stream, hitting all the RTN points. Holding a network derived elevation at one end, only one of the other 11 RTN was off more than 2cm vertically.
But this is robust network with a lot of base density and most of the bases in the CORS system and installed/maintained to their standards.
Do you know if you were ever more than 20-30km from a base station?
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Doubtful. Most likely had three bases within 30km.
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