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.

APEKS FAQ | How to Connect Your APEKS GNSS via Bluetooth?

2025-04-30

If you're just getting started with RTK surveying using an APEKXS device, one of the first things you’ll need to do is connect your RTK receiver to your controller. In this blog, we’ll walk you through the Bluetooth connection setup — step by step — so you can begin your fieldwork with confidence.

Step 1: Choose the Instrument Type

After powering on the controller, tap the Device option on the main screen.

Then go to the Communication settings menu.

Under Device Type, tap and select GNSS — this means you’re connecting a satellite positioning instrument.

Step 2: Select the Brand

In the brand list, scroll down and choose APEKS.

This allows the software to apply the correct protocol and commands for your device.

Step 3: Select the Model

Now, select the specific model of your RTK device.

Options might include: AP10 AP30 AP50

Make sure you choose the correct model that matches your physical receiver.

Step 4: Choose Bluetooth as the Connection Method

In the connection method section, select Bluetooth.

This wireless connection is commonly used for RTK surveying and offers a quick setup without cables.

Step 5: Choose the Right Bluetooth Number

Your device will now search for available Bluetooth devices nearby.

Look for the Bluetooth name or number that matches your RTK receiver (usually labeled with the serial number or device name).

Select it, and then click Connect.

Once connected, the controller will establish communication with your RTK receiver, and you're ready to move forward with your survey.

Tip: Some APEKS GNSS support NFC. If enabled, simply tap your controller to the RTK to connect automatically — even faster than Bluetooth pairing!

Congratulations — you’ve completed the first major step in setting up your APEKXS RTK receiver!

Stay tuned for our next blog in the RTK Beginner Guide series, where we’ll show you how to configure correction data and start your first measurement.

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