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 TPN | Software Activation Rules for CS3i CS5i After Reset

2025-07-25

Resetting Your CS3i or CS5i Controller? Read This First.

Resetting a CS3i data controller or a CS5i data controller to factory settings will invalidate your current software activation. This happens because the reset process generates a new Software ID, which no longer matches the original activation code.

🔍 What Happens After a Reset:

The controller is recognized as a new device.
A new Software ID is created.
The original software code will not work with the new ID.

✅ What You Can Do:

If you still have the original software code, send it to us — we can generate a new code for the updated Software ID free of charge.
If the original code is lost or unavailable, a new license must be purchased.

💡 Pro Tip:

Keep a backup of your original software code in a secure location. It can save time, money, and unnecessary frustration if a reset ever becomes necessary.

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