Consider the following errors associated with EDM:
1) Precise centering at the master and slave station.
2) Error due to variation in meteorological conditions like temperature, pressure, humidity.
3) Errors associated with pointing/sighting of a reflector.
Which of the aforementioned errors can be classified as atmospheric errors?
1
Only 1 and 2
2
Only 2
3
Only 1 and 3
4
Only 3