Improving GPS Accuracy in the Cedar CT8x2 and CT8
3 May 2023
The Cedar CT8x2 and CT8 tablets use the u-Blox M8030 receiver for GPS. You can improve the GPS accuracy by changing the location settings. For even greater accuracy, you can add an external antenna.
Change the Location Settings
The CT8x2 runs on the Android 10 operating system. To change the location settings in the CT8x2,
- Open Settings > Security & location > Privacy > Location > Location mode.
- Change the setting to GPS + GLONASS + GALILEO.
The GPS + GLONASS + GALILEO setting increases the number of satellites used by the GPS receiver.
Note: Juniper Systems also recommends disabling Wi-Fi Scanning, Bluetooth Scanning, and Google Location Accuracy to improve GPS accuracy.
Go to Settings > Location. Ensure Use Location is enabled.
Under Location, select Advanced > Google Location Accuracy. Confirm Improve Location Accuracy is disabled.
Under Location, select Wi-Fi and Bluetooth scanning. Turn off Wi-Fi scanning. Turn off Bluetooth scanning.
The CT8 runs on the Android 8.1 operating system. To change the location settings in CT8,
- Open Settings > Locations.
- Tap Mode.
- Change the mode to Device only.
Device only mode ensures that the CT8 uses only the unit's GPS. You must use this setting if you add an external antenna.
Note: High accuracy mode (available in Android 8.1 and earlier versions) is for finding addresses and relies on cell towers, Wi-Fi, and sometimes Bluetooth to help triangulate position, which can cause drift from the actual GPS location.
Add an External Antenna
Juniper Systems offers two external antennas to greatly improve GPS accuracy. With the Cedar CT8 External GNSS Antenna MMCX, you can achieve close to 1 meter accuracy. With the Geode GNS3M antenna, you can potentially achieve RTK Float (decimeter-level accuracies), using ATLAS, NTRIP, post-processing, and other correction methods.