What is the accuracy difference between Fixed and Float RTK?

Fixed RTK typically delivers ±8 mm horizontal and ±15 mm vertical accuracy. Float RTK carries ±300–1000 mm of positioning error depending on baseline length and atmospheric conditions.

Why does my RTK show Fixed but coordinates are still wrong?

Common causes are a datum mismatch (wrong coordinate system), an incorrect geoid model applied to elevation, or an antenna height entry error.

How do I know if multipath is affecting my survey?

Multipath typically shows as unstable repeated measurements — the same physical point measured three times gives results differing by 20–50 mm rather than the expected ±8 mm.

Can I survey during ionospheric storms?

RTK accuracy degrades during geomagnetic storms (Kp index above 5). For precision engineering or cadastral surveys, postpone sessions until the Kp index drops below 3.

What is the maximum reliable CORS baseline for centimetre accuracy?

Most CORS networks guarantee ±10–20 mm horizontal accuracy within 50 km of the nearest reference station. Beyond 70 km, deploy a self‑deployed base station within 15 km of the survey area.

How to Calculate a Slope Using RTK？

2025-10-23

How to Calculate a Slope Using RTK

Introduction
Accurate slope measurement is essential in surveying, engineering, and construction. With the help of an RTK (Real-Time Kinematic) receiver, you can easily calculate slope data — including azimuth, elevation difference, and gradient — with just a few simple steps.

Step 1: Collect a Point at the Top of the Slope

Begin by moving to the top of the slope.
Select Point Survey on your RTK device to record the first point. This point will serve as the starting reference for your calculation.

Step 2: Collect a Point at the Bottom of the Slope

Next, go to the bottom of the slope and record another point using the same Point Survey function.
Make sure both points are collected under stable signal conditions to ensure data accuracy.

Step 3: Access the Tools Page

After collecting both points, open the Tools page on your RTK controller.

Step 4: Perform Coordinate Inverse Calculation

In the Tools menu, select Coordinate Inverse Calculation.
Choose the two points you just measured, then tap Calculate.

Step 5: Review the Results

Once calculated, the system will display key parameters:

Azimuth: The directional angle between the two measured points.
Elevation Difference: The vertical height difference between the two points.
Slope: The gradient or inclination between the top and bottom points.

These results provide precise slope information that can be used for site analysis, road design, or terrain evaluation.

Conclusion

Calculating a slope with RTK is quick, efficient, and highly accurate. By following these simple steps, you can obtain reliable slope data directly in the field without the need for complex post-processing.

For more tutorials and professional tips on RTK operation, stay tuned for our upcoming guides.