Introduction
To find the location accuracy of a Ruptela device, refer to the horizontal position accuracy section in the device datasheet. This article explains what each value and term in that section means.
1 Datasheet Terms Explained
The table below explains each term you may find in the horizontal position accuracy specification.
Term | Meaning |
CEP (Circular Error Probable) | A method of measuring positioning precision. It defines a circle around the true location that contains a given percentage of all measured points. For example, 2.5 m CEP 50% means that 50% of all measured points fall within a 2.5 m radius of the actual location. |
24 hours static | The accuracy was tested over a 24-hour period with the device in a fixed (non-moving) position. |
-130 dBm | The GNSS signal strength level at which the testing was performed. |
>6 SVs | More than 6 Satellite Vehicles (GNSS satellites) were visible during testing. |
The following example illustrates how CEP works. Imagine 20 position measurements plotted around the true location:
The innermost circle contains 10 out of 20 points (50%) that are closest to the real location. That circle represents the CEP.
💡 Tip: If a percentage is not specified alongside CEP, it is typically assumed to be 50%.
2 Older Ruptela Devices (3rd gen)
For older 3rd generation devices, you can refer to the datasheet of the GNSS module itself to find horizontal position accuracy values. If the information is not readily available, raise a ticket to our Support team and they will assist you.