Ths is the updated version to this topic.
Some users may find their Alpha has better positioning accuracy when they use it to work with a local (Alpha) base, comparing to working with a public VRS/CORS base.
The reason is that the Glonass signals provided by some VRS’s/CORS’s may not include a specific field needed by Alpha to calculate coordinates. In this case, omitting bad Glonass signals and using only GPS signals in RTK/PPK helps accuracy improvement.
Here is a tip for those who want to try to improve this situation: use GPS+BeiDou firmware. When we are using GPS+BeiDou firmware, the Glonass GNSS data will not be used in RTK/PPK, and BeiDou signals help to gain better accuracy of single-point positioning.
First, we check the current firmware. The processes are:
- Switch to position A (left-hand side) when you are going to config Alpha.
- Connect Alpha with PC and start RTK Viewer
If you are already using GPS+BeiDou firmware (as shown ), then do nothing.
Otherwise, we re-program Alpha to use GPS+BeiDou firmware. The processes are:
Click “Updates->Alpha RTK Receiver Type Configuration”
Click “Download and Update” button
Switch to position B (right-hand side) when you are using Alpha as a rover.