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SPP: Single Point Positioning Single Point Positioning. Traditional Single Point
Positioning (SPP) relies on measuring pseudo-range observations (C/A code or P code)
for positioning. Generally, it can only achieve an accuracy of tens of meters or even
worse. Therefore, it is not considered a high-precision positioning method..
DGPS/RTD: It is regional augmentation system which includes WAAS, EGNOS, MSAS,
etc by using geostationary orbit (GEO) satellites to carry satellite navigation enhanced
signal transponders, various correction information such as ephemeris errors,
satellite clock errors, and ionospheric delays can be broadcasted to users, achieving
improvements in the positioning accuracy of the original satellite navigation system.
RTK: Real - time kinematic, this is the most used mode for usual operations based on
radio mode or CORS network mode.
E-PPP:
1) Satellites correction service from BDS B2b signal (Free but only for part of Asia
with 10cm accuracy) for new NX510 SE PA-3 (J1PA01980102010005)
2) NX510 PRO Trimble RTX (Extra charged)
3) NX510 Plus NovAtel TerraStar (Extra charged)
DRSmooth: It is CHC own positioning mode without base correction for new
NX510SE PA-3 (J1PA01980102010005) to realize centimeter accuracy or submeter
accuracy, but it keeps short time around 20 minutes then the accuracy will get worse,
so it is necessary to reset per 20 minutes in the software.
It is available to switch to DRSmooth mode, then set a value to get Fix solution (The
default time to fix value is 3 seconds and the range is from 3-100s);
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