I am interested in the SparkFun GPS-RTK-SMA Breakout - ZED-F9P (Qwiic). However, I require RTK precision of 10 mm. Could you please advise me on which devices I would need to achieve this level of accuracy?
I am planning to conduct a gamma natural radiation survey map in an extended field. This requires high precision because I will be walking through the field, measuring step by step, spending about one minute at each point. I need to accurately record the position of each point.
Is the SparkFun GPS-RTK-SMA Breakout - ZED-F9P (Qwiic) suitable for this purpose? If so, could you guide me on how to set it up and what additional components I would need? Alternatively, if there is a better option, I would appreciate your recommendation.
On each product page there is a ādocumentationā section with links; the hookup guides in this area will walk you through getting it set up and going once in-hand
What sort of device will you have in the field for data collection?
IE: What/how are you recording the radiation readings?
If you are building a rig, the PostCard might be a good choice to incorporate.
If you already have your kit sorted out, then the new TX2 might be a good fit ?
There really isnāt a ābadā answer in the RTK lineup, but some serve different purposes a little better.
Do you have a RTK Correction service already picked out (many States in the USA have free RTK Networks, for example). Otherwise, PointPerfect Flex is a great service.
If you wont have internet/cellular service at the project sites for RTK corrections, you can look at a Base/Rover combo, or satellite internet service such as StarLink Mini.
After reading your response, I think the ZED-F9P with 1.4 cm accuracy will be acceptable for my project. Since I will be spending about one minute at each measurement point and walking through the field, 1.4 cm precision should be sufficient for correlating the radiation readings with their positions.
Just to confirm ā if I go with the ZED-F9P and add the recommended GNSS Multi-Band L1/L2/L5 Surveying Antenna (SPK6618H), will that help me achieve the 1.4 cm precision consistently? I understand that antenna quality is very important for accuracy.
In addition, my project is based in Peru.
Thank you again for your guidance ā itās very helpful for someone new to RTK systems!
Iām only seeing a few (free) RTK reference stations in Peru. You will need to find a suitable RTK Correction source for your area, or use a Base/Rover pair, etc if you need cm accuracy.
FYI: PointPerfect Global is expected this year and would pair nicely with the X20 that @TS-Russell mentioned, but thatās a 10cm solution. PP Flex doesnāt appear to be available in Peru yet.
So, according to your comments, for my project I can go with:
2x SparkFun GPS-RTK-SMA Breakout - ZED-F9P (Qwiic) (Base/Rover)
2x GNSS Multi-Band L1/L2/L5 Surveying Antenna - TNC (SPK6618H)
2x Reinforced Interface Cable - SMA Male to TNC Male (300mm)
1x SparkFun LoRaSerial Kit - 915MHz (Enclosed)
2x Microcontroller
What else do you think I need? What are your thoughts? I believe I can achieve centimeter-level accuracy with this setup.
That setup will be good to ~1cm + 1PPM (so, right about ~1cmā¦PPM means parts per million, where you lose 1mm accuracy for every 1 km between the time-dependent nodesā¦in this case a base & rover)
