I have a coordinate time series for 2 hours and 1 second interval (observation=7200). How can I compute the hourly amplitude from this data?
If your data does not contain noise (You did not say nothing about it), then you can calculate amplitude very easy by using definition of amplitude:
A = (max(x) - min(x))/2, where x - your data
P.S. If you are not satisfied with the answer, then you need to clarify your question. In particular - what signal and what you mean by amplitude and how you going to use this number