Canadian Spatial Reference System Precise Point Positioning (CSRS-PPP)
This guide explains how to get the precise coordinates of a standalone receiver using the Canadian NRCan CSRS-PPP service.
Overview
The Canadian Spatial Reference System (CSRS) PPP service is provided by Natural Resources Canada's Canadian Geodetic Survey. It uses single or dual-frequency GPS and GLONASS data for solution computation and supports both Static and Kinematic modes.
Static computation is accomplished with a receiver sitting on one point. As the result of Static mode, you will get the absolutely determined position of this point.
Kinematic mode allows surveying with a moving receiver and provides a path as the solution.
Depending on the accuracy level and time that is required to get the solution, the NRCan CSRS-PPP service can calculate the data in the following modes:
Orbit type | When the orbit is ready for use | Accuracy |
---|---|---|
ULTRA-RAPID | about 60 minutes after the end of each hour | ~15 cm |
RAPID | about 12 hours after the end of each day | ~5 cm |
FINAL | 12 days after the end of each week | ∼2 cm |
You can learn more about NRCan CSRS-PPP service on their official site.
Workflow
This guide will show you how to process raw data recorded in the Static mode.
Placing the base
Place your Reach precisely above the marked point on the tripod and level it. You can learn more about placing Reach in the Placement tutorial.
Recording RINEX logs on Reach
To record logs for NRCan CSRS-PPP, perform the following steps:
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Open Emlid Flow and connect to your Reach.
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Go to the Logging screen.
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Tap the Recorded logs and settings button.
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To configure logging, tap the Settings button.
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Select the CSRS preset.
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Choose the required RINEX format in the Raw data section.
noteIf you do not know which version of RINEX you need, we recommend using RINEX 3.03.
tipWhile 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.
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Tap Show configuration and enter the measured height to the bottom of the receiver in the corresponding field.
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Fill in the point's name in the Marker name field.
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Tap Apply.
tipYou can start recording automatically when your receiver is turned on. Check the corresponding field on the Raw data settings screen.
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Enable log recording by tapping the Start recording button. The red recording icon will appear in the status bar.
noteNRCan CSRS-PPP requires recording the data for at least 4 hours to get the best accuracy.
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To finish recording logs, tap the End recording button.
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.