it could of been taking that long because the antenna was on the back deck and did not have the best view of the sky. I did not time it but it was long enough that I thought it was important to note it. it will hopefully be faster when we re-install the antenna on the sprayer.
Trimble actually sells there own Bluetooth adapter
Once the 372 has acquired WAAS, it then takes only tens of seconds to achieve RTK for me.
Occasionally it just wonât get RTK for me, and I have to go back to WAAS and wait for DGPS and then select RTK and it goes again quickly.
Is that just a bug, why would WAAS speed up RTK fix in any way? For us it takes quite a long time to get EGNOS correction because of the very low datarate from EGNOS satellites. RTK takes seconds from a complete set of correction messages (dual frequency receiver at a decent range from the base).
Youâre right it doesnât make sense. I must be incorrect. Thereâs no EGNOS at all in Australia and Iâm quite sure RTK works fine for them.
It could just be that the 372 just needs to observe long enough to get a good track on the satellites and then it can apply the RTK calculations quickly.
It will take several minutes to get a fix if the ephemeris data is not present in the receiver memory. This might be possible if the internal battery of of the receiver is dead or if the receiver has not been turned on for a long time. I have understood that it takes 12,5 minutes to receive the full ephemeris and almanac data from the satellites.
Most of the base stations do not broadcast the ephemeris data (RTCM 1019 for GPS and RTCM 1020 for GLONASS). Some CORS stations do, but the interval for these messages is usually pretty high 60 -120 seconds.
For this very same reason in RtkLib rtknavi you can not a get a fix unless you also stream the RTCM3EPH as a correction input.
I had a Trimble 252 RTK some years ago. There was some discussion about the internal battery issue back then at:
https://talk.newagtalk.com/forums/thread-view.asp?tid=599016&DisplayType=flat&setCookie=1
Xfill will work!
Just go to Trimbles website, find the most recent frequency map. Enter the frequency displayed on the map for your region. They seem to change it every couple years for a service call.
USA, Canada RTXNA 1555.8080 2400 July 1, 2019
When I set up a personal cellular base for my friend we tried it and it worked. He had a old frequency entered, once the new frequency was entered RTX fallback started working. Not that he really needs it, he gets great cell service.