How do I use the Argonautica/ArgoHydro website and its data?

Every week (on a Monday), Argonautica releases the following information on, Argonautica provides:

The data are sorted:
- by project, grouping several measurements points in each project, over e.g., the same river along its flow, but not only -- it can be rivers under similar or different climates, or a lake and the rivers feeding it, etc.)
- by "station", i.e., a measurement point at a given place, using a given instrumentation. For now, only satellite water level measurements are available.