Are Javad UHF Radio Repeaters being supported, With LS+?

[Nate The Surveyor]

One of the interesting things I have noted is that at my local courthouse, when SOMETHING more needs done, they give the new job to the county circuit clerk. This has been ongoing, for 40 years. Now it takes 4-5 persons to run the clerks office.... It used to be just one...
When I first got involved with Javad, I bought 3 LOCUS single freq. receivers. Then added 3 more. A cluster of 6 LOCUS can do alot, with a reflectorless Total station.
These were 8 channel receivers. They had an algorithm to use the lower satellites, (As opposed to the ones higher in the sky). So, I learned that setting one receiver in a field, (100% sky view) would not work as well as 2 similarly obstructed ones. So, one was in 100% area all day long, while leap frogging the rest.
Then, I got Legacy E receivers, (A Javad product, painted yellow). These receivers have BETTER radio range, than an LS+. BECAUSE the LS + has MUCH MORE in the radio packets. (Like loading more on the County Clerk)
So, now we have 864 channel receivers, and the radio is expected to carry MUCH more data than before. I believe this is reducing range. Where are we going from here? We are NOW using 2 second transmission rates, apparently because the radio cannot do it all in 1 second.
I bought a 4 watt radio, to use with my 35 watt radio to use as a repeater, in lieu of renting a 35 watt one. Cost was some $1400.00. Now, will it still work as a repeater? or, Due to the increase in data load, (Remember the county clerk?) is this technology no longer such a good idea? And, what about narrow banding? 12.5 band width?

Another guy is using Elon Musk's "Starlink". Is that where we are headed? I TRIED 2x to use Data Center to get my coms, base to rover, via sim cards, and the internet. Failed both times. John Evers on the 5 PLS team said he could work out the details. Can I get this thing going via internet? I am thinking, that a combination of internet, and UHF may be a good solution. A properly set up duplexing receiver could do the job...
It just seems that good wide band communication base to rover is an essential component of any good RTK system.
A little help would be appreciated.
The BEST Base to Rover communications is FULL, Works out to 25 miles, and invisible. Never needs maintenance... Maybe even back at the 5 hz rate! I'm dreaming... but it is NEEDED!
Nate

 

[JAVAD Support]

“ Will HPT radio (4-Watt or 35-Watt) still work as a repeater? "

https://support.javad.com/index.php?threads/using-my-radio-as-a-repeater.5959/page-2#post-56038

The ability for a TLS to configure an external radio as ‘a repeater’ is not able to be accomplished.
A Repeater ‘in receive mode’ has to listen for any ‘base’ communication and data (on a UHF frequency channel)), then switch from ‘receive mode’ to ‘transmit mode’ (on a UHF frequency channel), and then send the (previously received) data to the ‘rover’, and then switch back to ‘receive mode’ and listen for the next ‘base’ data transmission.
The Repeater mechanism introduces ‘a turnaround delay’ of a second or more in the data link...

Other questions:
A 25 mile RTK baseline is a very long way – 40 kilometers . . .
Accuracy decreases as the baseline length increases, with optimal performance typically achieved within 10-20 kilometers of the base station, visible horizon.

Most users these days are using a combination of UHF radio for close survey work and also cellular for locations where UHF RSSI (Received Signal Strength Indicator) signal's are not reliable due to ‘terrain’ or ‘interference’.
The key (for Internet) is to make sure that the ‘base’ with its static IP-Address internet connection is operational.

Which, following good ‘base location setup practice’, where the receiver is located in a clear and open area, is normally able (and needs) to be attained.


The ‘rover’ UHF and cellular signal reception is often the issue.
Poor UHF RSSI can easily be measured by the TLS ‘rover’, as can cellular signal reception and connectivity.
The TLS can be configured on the fly to use UHF or cellular / Wi-Fi internet corrections (redundancy).