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High Precision GNSS Products

Unicore high accuracy gps module are based on the NebulasIV GNSS SoC.

With all-constellation all-frequency support and designed for use in high-precision applications such as UAV, robots, precision agriculture, surveying, mapping, vehicle navigation, telecom and more, NebulasIVoffers outstanding RTK and Heading performance at affordable pricing.

High Precision GNSS Products Features

Driven by a full-constellation and full-frequency RTK engine, Unicore's RTK algorithm takes advantage of triple and quad frequency observables, effectively mitigating ionospheric residuals.

RTK can provide real-time centimeter-level glonass precision positioning, which requires real-time base station data. In practical applications, radio or wireless network communication is often interrupted. During the interruption of the base station data, RTK's positioning accuracy decreases quickly. Unicore's RTK KEEP technology can maintain the centimeter-level positioning accuracy for more than 10 minutes after the interruption.

FAQS

High Precision GNSS Products FAQs

What is the impact of discontinuous transmission of differential data or excessive delay on RTK solution?

The more stable the transmission of differential data is, the greater the help for differential positioning, and the more stable the accuracy will be. If the packet loss is very serious on the transmission link of differential data and the differential age usually exceeds 15, the reliability and accuracy of RTK will decrease.

RTK eliminates ionospheric errors, tropospheric errors, satellite orbital errors, and satellite clock bias through the correlation of errors between the base station and rover station, thereby achieving centimeter-level positioning accuracy. If the transmission of the base station data is interrupted, the correlation between the rover station observations and the aforementioned errors in the base station data tens of seconds ago will be weakened, and the longer the time, the weaker the correlation, and then the positioning accuracy will drop fast.

Ordinary receivers will not be able to provide RTK service after 20 seconds since the interruption of the differential data transmission. But Unicore's RTK KEEP technology, which uses models and estimation to eliminate the satellite orbital errors, clock bias, ionospheric and tropospheric errors, as well as other factors that affect the positioning results, can maintain centimeter-level accuracy for more than 10 minutes after the transmission of the differential data from the base station is interrupted. This greatly improves the availability of RTK service, especially for applications such as UAVs and forestry operations, where radio or wireless network communications are often interfered or blocked.

Signal acquisition process

The NebulasIV chip is upgraded on the basis of NebulasII. It can capture and track each frequency independently.

For more information about precision gps receiver and accurate gps module, please feel free to contact us!

If you are looking for a reliable gnss company, don't hesitate to contact us!

Localisation : F3, BDStar Navigation Building, No.7, Fengxian East Road, Haidian, Beijing, P.R.China,100094, 100094 Beijing,
Personne à contacter : comm unicore, +86 10 69939800

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