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I think this statistic is wrong (it seems too low):

The number of stations measuring each irradiance component is presented in the figure below.

I think this statistic is wrong (it seems too low):

The number of stations measuring each irradiance component is presented in the figure below.

The code is correct. The problem is that we are not consistent in reporting the components measured. For example:
Stations that use SPN1, RSR, RSI are blanc in the "components" column and mention this in the "instrument" column - but unfortunately there is no consistency... So I suggest we fix first the metedata format (like we discuss in #111) and then we can look again at this plot...

@kandersolar would you be willing to throw a quick glimpse at the new statistics page and see if there's anything you think is missing?

Nice! A few ideas:

• histogram/CDF of dataset length
• number of stations per latitude bin
• make all plots (where possible) show the results split by Tier (e.g. Top 5 countries plot could be stacked bars)