What performance can I expect from Trimble RTX correction services?
The performance specifications for Trimble RTX correction services are listed below, dependent on receiver type and region of operation.
Correction Service |
Delivery Method |
Horizontal Accuracy (cm) or (in)1 |
Initialization Time (mins) |
---|
CenterPoint® RTX |
Satellite and Internet |
2.5 cm (1") |
< 2 min in Fast coverage regions < 5 min for Trimble ProPoint™ devices2 < 20 min in Standard coverage regions |
RangePoint®RTX |
Satellite |
15 cm (6”) pass to pass, 50 cm (20”) repeatable |
< 5 min |
ViewPoint RTX™ |
Satellite |
30 cm (12”) pass to pass |
< 5 min |
CenterPoint®VRS |
Internet |
2.5 cm (1") |
< 5 min |
xFill® Premium |
Satellite |
2.5 cm (1") |
Instant switch over after RTK signal loss |
195% performance based on repeatable in field measurements. Achievable accuracy and initialization time may vary based on type and capability of receiver and antenna, user’s geographic location and atmospheric activity, scintillation levels, GNSS constellation health and availability and level of multipath including obstructions such as large trees and buildings.
2Global average initialization time when using GPS, GLONASS, Galileo, and BeiDou available globally by IP and regionally by L-band.
What is initialization?
Initialization (also known as convergence) is the start-up process of calculating the receiver’s position to a desired accuracy level. When the position of the receiver reaches full accuracy, then it is considered fully initialized, and you can start working with confidence. Once initialized, the receiver will maintain that level of accuracy unless initialization is lost through GNSS signal interruptions. If the receiver does experience a disruption in GNSS corrections, re-initialization is required.
How long does initialization (or convergence) take?
Initialization time ranges from 1-20 minutes based on type of correction service, type of receiver and antenna, geographic location, atmospheric activity, scintillation levels, and other variables.
Correction Service |
Initialization Time (mins) |
---|
CenterPoint® RTX |
< 2 min in Fast coverage regions < 5 min for Trimble ProPoint™ devices1 < 20 min in Standard coverage regions |
RangePoint®RTX |
< 5 min |
ViewPoint RTX™ |
< 5 min |
CenterPoint®VRS |
< 5 min |
1Global average initialization time when using GPS, GLONASS, Galileo, and BeiDou available globally by IP and regionally by L-band.
Can I start working before the receiver is fully initialized?
Yes, but it is recommended that you wait for your receiver to be fully initialized in order to work with the correction service’s full accuracy. Most Trimble RTX capable receivers will allow you to set a “convergence threshold”, which allows you to determine what accuracy level must be reached before you begin working.
Does the receiver need to remain stationary while initializing?
No, the receiver does not need to remain stationary while initializing, and the initialization time will be similar whether the receiver is moving or stationary. However, it is recommended that you remain stationary because any overhead obstructions that may occur while you are moving will extend the initialization time.
How long will it take my receiver to resume high precision positioning after a temporary loss of GNSS signals?
If your receiver loses all GNSS signals at once, positioning will stop immediately. In case the GNSS visibility resumes after less than 5 minutes, a special method is used to rapidly produce quality positions again by accounting for changes to the ionosphere. Otherwise, a regular convergence time may occur.
How long will my receiver continue working if I temporarily lose the Trimble RTX correction stream?
If you temporarily lose the Trimble RTX correction signal, the receiver can continue working around 200 seconds before a full re-convergence is necessary. Full accuracy will resume quickly in case the RTX correction stream is back within 200 seconds. Otherwise, a regular convergence time may occur.
Why does CenterPoint RTX have multiple initialization times listed?
CenterPoint RTX has multiple initialization times for various reasons:
- Satellite baud rates, which affect initialization times, are different in various regions.
- The type of receiver you use impacts the initialization time you can achieve.
- There are regions where CenterPoint RTX Fast is available; these regions receive a convergence time of <2 minutes.
- If you are using a Trimble NAV-900 receiver with ProPoint technology, you will experience initialization times <5 minutes in a majority of regions worldwide.
- The standard performance for initialization time for any other positioning receiver in most regions is about <20 minutes.
Please view the
coverage map to see what is available on your farm.
What is CenterPoint RTX Fast Restart?
CenterPoint RTX Fast Restart is a feature that allows rapid re-initialization of CenterPoint RTX based on a previously known point. By starting the receiver in the same location that it was in when it was last turned off, CenterPoint RTX can fully initialize in less than 5 minutes. When using CenterPoint RTX Fast, this feature is not applicable, as the solution can fully initialize in less than 2 minutes.
What is the difference between using CenterPoint RTX and a local base station (RTK)?
CenterPoint RTX and RTK both offer GNSS corrections however they differ in several ways:

How are Trimble RTX correction services different from SBAS systems such as WAAS and EGNOS?
Trimble RTX correction services are different from SBAS systems like WAAS and EGNOS because Trimble RTX technology is compatible with multiple GNSS constellations whereas SBAS systems typically use only one GNSS constellation to generate corrections. Trimble RTX technology provides more accurate, consistent, and repeatable positioning than WAAS or EGNOS. Trimble RTX correction services are also available worldwide while SBAS systems are limited to certain regions.
How do Trimble RTX correction services compare to other GNSS correction methods?