With enough satellite signals, single frequency RTK receiver works well under open sky environment. Of available ones on the market, we have yet to see one that works well in environment with surrounding trees and buildings. The above video shows a new level of performance with our soon to be released update firmware enabling to work under such condition.

The recorded NMEA is replayed using RTKplot, overlaid on video showing the test environment. Green dots represent RTK Fix points; orange dots represent RTK Float points. It showed RTK Fix being maintained in environments where other low-cost RTK receivers would change to RTK Float or have jumps. Even when changing to RTK Float, accurate positioning is still being maintained without any jump. This more robust performance is coming closer to what people expect with more expensive dual-frequency RTK receiver for autonomous applications.

Currently this is using our S2525F8-BD-RTK GPS/BDS receiver. We would like to make similar improvement to our S2525F8-GL-RTK GPS/GLONASS receiver, but require some assistance logging 20 minutes of static data on 3 separate occasions using two survey grade base and rover antennas that covers L1 GPS/GLONASS in Europe and North America where there is EGNOS and WAAS signal respectively. 

If anyone with suitable survey grade antennas living in North America or Europe kind enough having interest to offer assistance, we would be happy to supply a pair of our 10Hz capable S2525F8-GL-RTK receiver evaluation boards; please send me a message. Thank you !

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  • Performance of small antennas could vary greatly. It's best for the antenna vendors to show how good their small antennas are compared to survey antennas. SkyTraq could only work on the receiver side to bring state of art performance. It'll likely follow the path of what happened 15 years ago. Back then using 25mm x 25mm ceramic patch antenna was pretty much state of art. Cellphone E911 drove development of small chip antennas. Similarly autonomous applications will drive the development of high performance small antenna for precision applications.

  • How well does this work with small antennas you are likely to use on a UAV?

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