How to log data for PPP
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This guide shows how to record logs for the Precise Point Positioning services and download them using Emlid Flow.
Precise Point Positioning is a technique that requires processing a raw data log from the standalone receiver for further removing or modeling GNSS system errors to provide a high level of position accuracy.
To learn more about PPP, check the How PPP works article.
Recording RINEX logs on Reach
To record logs for PPP, perform the following steps:
Open Emlid Flow and connect to your Reach.
Go to the Logging screen.
On the Receivers screen, tap Settings.
Select the preset depending on the PPP service you choose.
Choose the required RINEX format in the Raw data section.note
If you do not know which version of RINEX you need, we recommend using RINEX 3.03. However, make sure the PPP service you choose supports this version of RINEX.tip
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.
Tap Show configuration and enter the measured height to the bottom of the receiver in the corresponding field.
Fill in the point's name in the Marker name field.
Tap Apply and start.tip
You can start recording automatically when your receiver is turned on. Check the corresponding field on the Raw data settings screen.
Enable log recording by tapping the Start recording button.note
PPP services requires recording the data for at least 4 hours to get the best accuracy.
To finish recording logs, tap the End recording button.caution
Wait for data processing to finish.
You may log the data for up to 24 hours, depending on the accuracy required.
Once you finish the survey, don't forget to turn off raw data recording in the logging settings.
After you finish raw data logging, you need to download RINEX data from Reach to your mobile device.
Go to the Logs section at the bottom of the Logging screen.note
You can also find information on the logs size and recording date and time here.
To export the file, tap the Download button.
Save your log depending on the device you use.tip
If you do not need your logs anymore, you can delete them using the Select button.
When the logs are downloaded, you can start working with your data in the PPP service.