[atlas] Ripe atlas measurement issues

Hello Atlas team, I have a problem concerning downloads of measurement data from ripe atlas data. In order to evaluate some measurements, I use a script which downloads measurement data of the current week. This worked perfectly until the changes in the download section of ripe atlas. Since then, the urls are not considering time constraints and return measurement data from further in the past. My urls look like: https://udm01.atlas.ripe.net/api/v1/measurement/1000002/result/?filename=udmlog_1000026_2013_20.json&y=2013&w=20 I also tried the start_time parameter, instead of &y / &w but the problem stays the same. Did anyone experience similar issues and could help me out on this? Many thanks in advance. Best Regards, Alexander Balz