---
title: "Export and convert Leica GS18 GNSS data to RINEX format"
slug: "export-and-convert-leica-gs18-gnss-data-to-rinex-format"
updated: 2026-08-24T05:26:44Z
published: 2026-08-24T05:26:44Z
canonical: "knowledge.emesent.com/export-and-convert-leica-gs18-gnss-data-to-rinex-format"
stale: true
---

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# Export and convert Leica GS18 GNSS data to RINEX format

This article explains how to export raw GNSS data from a Leica GS18 receiver and convert it to RINEX format for use in a PPK Georeferencing workflow.

## Prerequisites

- Leica GS18 receiver with RINEX data recorded to the SD card
- SD card reader
- Windows laptop or PC
- teqc conversion tool (download from [GAGE Software](https://www.unavco.org/software/data-processing/teqc/teqc.html))

## Procedure

### Step 1: Export data from the receiver

1. Power off the Leica GS18 receiver.
2. Remove the SD card from the receiver and insert it into a laptop.
3. Open the **DBX** or **Data** folder on the SD card.
4. Locate the **.m00** file for the session. Check the date modified to confirm it is from the correct recording session.
5. Copy the **.m00** file to the laptop.

### Step 2: Convert to RINEX

1. Download and unzip the teqc tool.
2. Copy the **.m00** file into the teqc folder.
3. Open a Windows Command Prompt and navigate to the teqc folder.
4. Run the teqc conversion command for the .m00 file.
5. Confirm the output includes a **.obs** file and a **.nav** file in the same folder.

The **.obs** file is the rover observation data. The **.nav** file is the navigation data. Both are required in Emlid Studio.

## Outcome

After completing these steps, the **.obs** and **.nav** files are ready for post-processing in Emlid Studio.

## Next steps

See [Process RINEX files in Emlid Studio](/v1/docs/process-rinex-files-in-emlid-studio).