System Requirements: Accuracy 2 cm LAT/LOT, 3 cm height, no real-time internet connection.
I have looked/read through a lot of different blogs related to RTK connections and on most of the setups they talked about utilizing an NTRIP Caster that requires an internet connection. From this link: https://learn.sparkfun.com/tutorials/ho … ster-setup they mention an advanced trick that utilizes radio comms to send the RTCM data between the basestation and the rover. Assuming I follow the procedure for ‘Creating a Permanent Base’ will I:
1.) Be able to send my RTCM data w/o the NTRIP caster?
The base station would need internet access at some juncture to receive its correction data (which can then be sent over radio, BT, wifi, or serial), you’d likely see ~2.5m accuracy without a correction stream
You do NOT need internet at all in the field with a dedicated base station AND a telemetry radio (such as the suggested 900Mhz telemetry radios) AND your rover is in radio range of the base.
If you are looking at absolute location accuracy, you will need to survey in the base station at the location you plan to run it, take that data (after 24hrs of data collection) and bring it somewhere you do have internet (home, work, office, etc), and submit it to a facility to get the corrections done and get your absolute location of that GPS antenna. You can then go back out to the device and locally load in that location, then it can go into base mode and issue RTK corrections.
The base essentially is outputting a data string every second or so over a serial link. That correction needs to make it into the rover, a serial link is fine. Any method you can get that data to the rover in a timely manor is fine.
That is what I thought, but every article, except for a few here and there, kept mentioning that you needed a NTRIP Caster. So, I wasn’t sure if this was possible or not, without buying the equipment necessary and testing my idea! Thank you JimKusz for clearing up that confusion for me!