Restore observations
Restore observations command restores original observations from a tie line file that has been saved earlier. It can be used, for example, to restore the original observations after applying corrections temporarily and removing bad tie lines.
To filter bad tie lines and restore observations:
1. Collect tie lines and save them into a file.
2. Solve correction(s).
3. Apply Correction to the loaded tie lines.
4. Search for worst observations and remove bad tie lines.
Erroneous tie lines usually stand out more clearly after corrections have been applied.
5. Restore original observations from the tie lines file saved in step 1.
6. Save the filtered tie lines.
