Ok, this works now for the selected unit, thanks for the hint.

What I am interested in is to retrieve the historical radiation data of several units, none of which are owned by me, for private analysis. Is this possible? If so, what are the preconditions?

The intent is to programmatically detect anomalies over many locations, e.g. spikes, together with timestamp and location. This allows for tracking fallout clouds more easily, and supported by computer tech.

What do you think?

Ok, I understand. But still, this procedure fails to produce historical data:
1) Login with my account
=> Map shows world overview with temperature clusters of today
2) Select Radiation
=> => Map shows world overview with radiation clusters of today
3) Select Dec 1st, “Apply” in the date picker
=> No change in the map!!

How can one access the database?

Thank you,
Peter