Hello,
I can use for my GPS-RTK project cheaper GNSS L1/L2 Multi-Band Magnetic Mount Antenna - 5m (SMA) - GPS-15192 - SparkFun Electronics or more expensive antenna GNSS Multi-Band L1/L2 Surveying Antenna - TNC (TOP106) - GPS-17751 - SparkFun Electronics. When I buy the more expensive, what benefit I get for it - will i get more precise position? Or something else?
Best Regards
Invest the most effort in the Base antenna and it’s situation/location, it will impact downstream performance and effectiveness.
The ANN-MB is a very well designed antenna, but does anticipate that you’ve put a 15x15 cm or 15 cm diameter ground plane underneath it. It has a magnet so a car roof is optimal. That won’t work on aluminium trucks…
At this point if you plan on making a significant investment, look for an antenna covering ALL bands and constellations. ie “four-star full-frequency”
Survey Antenna have more rigor in the design, construction and manufacture, so the phase-center is more tightly controlled and consistent.
So if i understand correctly, with Survey antenna I will get more precise results faster? The connection/cable/connector is the same in both antennas?
Not sure that would be my characterization.
It will be consistent between different antennas, ie someone else with a different copy of the same antenna will have the same results as you.
There should be an ANTEX file that relates the phase-center vs the reference surface on the mount, you can use with post-processing.
Where as without that, you’re measuring the phase-center of the antenna element, in the position and orientation used at that visit.
It comes down to mm level consistency between your visits, or visits by others with other equipment and conditions.