Beast Mode on the Net
- Thread starter Jim Campi
- Start date
Jim Campi
Active Member
Just to be certain we are discussing the same conditions. When I say network I am referring to a network service that provides real time corrections NOT a network we individually control and broadcast our own corrections.
In this case you need an LS, a data plan,reasonable base line to the network known point and a subscription to the network.
The California Real Time Network provides free accounts to the community. Now I can perform an RTK survey and only own the LS and take advantage of Beast mode.
I believe thisy is a fairly new addition to J-Field.
In this case you need an LS, a data plan,reasonable base line to the network known point and a subscription to the network.
The California Real Time Network provides free accounts to the community. Now I can perform an RTK survey and only own the LS and take advantage of Beast mode.
I believe thisy is a fairly new addition to J-Field.
Jim Campi
Active Member
One more quick point.
If we are using a UHF radio, we have the option of transmitting corrections at 1 Hz, upsampling the data on the LS at 5 Hz. This will provide essentially the same performance as Beast mode in terms of data quality and survey time. The advantage of this is decreasing the radio's modulation. It will allow greater range/penetration, decrease battery consumption and decrease heat output.
I haven't verified this however; it looks like performance is as strong as having true 5 Hz processing.
If we are using a UHF radio, we have the option of transmitting corrections at 1 Hz, upsampling the data on the LS at 5 Hz. This will provide essentially the same performance as Beast mode in terms of data quality and survey time. The advantage of this is decreasing the radio's modulation. It will allow greater range/penetration, decrease battery consumption and decrease heat output.
I haven't verified this however; it looks like performance is as strong as having true 5 Hz processing.
Jim Frame
Well-Known Member
I misunderstood, having been wrapped up for days now in trying to configure my T2 cellular connection.
I use CRTN a lot, since a fair bit of my work is within 10 km (and often less than 1 km) of a CRTN mountpoint. I'll have to try upsampling it. Until this morning, I didn't even know that upsampling was available.
Jim Campi
Active Member
I used it yesterday on a site in Vacaville receiving corrections from Mountpoint P268. Performance seemed identical to the T2, UHF and LS combination.
In fact, I surveyed the first half of the site about a month ago using my own base and running it through DPOS
Setup time was about 2 mins.
This is a significant addition to our tool chest.
In fact, I surveyed the first half of the site about a month ago using my own base and running it through DPOS
Setup time was about 2 mins.
This is a significant addition to our tool chest.
Yes, everything you said is correct. Upsampling provides the same performance as 5 Hz corrections. I have tested it with an external GNSS antenna split to feed 2 LS's, one with receiving 5 Hz corrections and the other upsampling 1 Hz corrections to 5 Hz, there is no detectable difference.
Jim Campi
Active Member
HI Adam,
I completely agree. Before I realized that we could upsample network corrections on the LS and achieve 5 Hz performance from a service transmitting corrections at 1 Hz, I would't use the California Real Time Network. It felt like using dial up when a broadband connection was available. However; now that we can achieve the same performance, there are some applications that are appropriate. For example, if I need to pick up a few points or perform a fast topo for a preliminary design, this is a great option. The setup time is less than 5 mins.
Wes Cole
Active Member
So have you successfully upsampled the NC RTN to 5 hz?
Jim Frame
Well-Known Member
It does beg the question, though, if it doesn't make a difference, does it offer any material advantages? I gave it a quick try this afternoon, and the most notable thing I saw was that the 10 verification epochs happened in about 2 seconds, as expected. So verification is being done with an extrapolated solution, yes? I'm not sure that's a good thing. Is there a way to change the number of verification epochs with V6 Verify?
No, the upsampling being done is not the same thing as an extrapolated solution. Interpolation is used to simulate/create 5 hz corrections. The RTK engines then process the corrections at a 5 hz rate. The advantage here is the same as it is with real 5 hz corrections, the RTK engines will fix faster when they are receiving good data. Increasing the Confidence Number will increase the number of epochs collected in the Phase One.
Jim Frame
Well-Known Member
Nevertheless, with only 10 epochs of verification, I'd much prefer that they be spread over at least 10 seconds. (Not interpolated would be even better.) Are there any plans to allow the verification epoch number to be modified, or is that available already and I just didn't see it?
It's always been editable.
New version also allows setting time for verification phase.
New version also allows setting time for verification phase.
Jim Frame
Well-Known Member
If the number of verification epochs is editable, can someone show me on which screen, and how to get there? I always have a hard time finding my way around the various config screens.