These keograms are RAW DATA. For publication purposes, please see the Rules of the Road. A short introduction to interpretation is available.
We mark the keograms according to the date ie. evening when the imaging started. So, if you are looking for, say, 1997 Feb 10 at UT0130, then you should select 1997 Feb 9. The midnight between the 9th and 10th is in the middle of the keogram and labelled as UT00.