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How to log data for PPK

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This guide shows how to record logs for Post-Processed Kinematic and download them using Emlid Flow.


Post-Processed Kinematic or simply PPK is a technique that requires processing raw GNSS logs from both base and the rover to receive an accurate positioning track or separate points after the survey.


To learn more about PPK, check the How PPK works article.

Recording RINEX logs on Reach

To record logs for PPK, perform the following steps both on your base and rover:

  1. Open Emlid Flow and connect to your Reach.

  2. On the Receivers screen, tap Settings.

  3. Go to GNSS settings and set the update rate at 1 Hz for the base and at 5 Hz for the rover.

  4. Go back to the Receivers screen and tap Logging.

  5. Tap the Recorded logs and settings button.

  6. To configure logging, tap the Settings button.

  7. Choose the required RINEX format in the Raw data section.


    If you do not know which version of RINEX you need, we recommend using RINEX 3.03.


    While recording in the RINEX format, you can log the UBX file as a backup. UBX file can be used to adjust RINEX file settings in the Converter tool in Emlid Studio. You can enable logging in the UBX format in the logging settings in Emlid Flow.

  8. Tap Show configuration and select the required satellite systems.


    Make sure that you have chosen the same set of satellite systems both on the rover and the base.

  9. Set the logging interval at Full rate.

  10. Tap Show configuration and enter the measured height to the bottom of the receiver in the corresponding field.

  11. Leave the Marker name field empty.

  12. Tap Apply.


You can start recording automatically when your receiver is turned on. Check the corresponding field on the Raw data settings screen.

  1. Enable log recording by tapping the Start recording button. The red recording icon will appear in the status bar.
  1. To finish recording logs, tap the End recording button.

Wait for data processing to finish.

Download logs

After you finish raw data logging, you need to download RINEX data from Reach to your mobile device.

  1. Go to the Recorded logs section at the bottom of the Logging screen.


    You can also find information on the logs size and recording date and time here.

  2. To export the file, tap the Download button.

  3. Save your log depending on the device you use.


    If you do not need your logs anymore, you can delete them using the Select button.

When your logs are downloaded, you can start working with your data in Emlid Studio.