Polaris S100 User Manual page 32

Question #2: I've used correct mountpoint, but still unable to get RTK Fix, why?
Answer #2: RTK require strong signal to work. Make sure S100 is used outdoors under clear open sky
unblocked signal environment.
Although S100 is GPS/GLONASS/Galileo/Beidou quad-GNSS, only common set of satellite signals
tracked by both base and rover are used for RTK computation, thus when used with GPS/GLONASS
RTK base, effectively S100 is no different from GPS/GLONASS-only RTK receiver, and actual RTK used
satellite number will be less than total tracked satellite number.
On initial use, it's good to choose time of day when there are more satellites overhead, avoid least
number of satellite situation, because if blocked by distant trees then actual usable satellites becomes
fewer, and it'll be more difficult to get RTK Fix. https://www.gnssplanning.com/
RTK is susceptible to interference. Normally the signal should fluctuate not more than 1dB-Hz in short
period. If seeing signal fluctuating by several dB in short time, it means there is interference affecting
RTK operation. A different location or different time of day without interference affecting RTK
operation will get RTK Fix.
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