detiding and chunks lengths

[tomsail]

Although ioc_cleanup does not directly tackle the de-tiding problem, it leverages de-tiding methods to better isolate and flag bad data on the tide gauges.

Here are some resources on this matter:

• Github discussion on Utide https://github.com/orgs/oceanmodeling/discussions/25
• Detiding Theory and Practices, cited in the Book of tides attached in the above github dicussion: https://www.researchgate.net/publication/280722791_De-tiding_Theory_and_practice