CC BY 4.0 UnportedWitting, TobiasFurch, Federico J.Kornilov, OlegOsolodkov, MikhailSchulz, Claus P.Vrakking, Marc J.J.2021-11-182021-11-182020https://oa.tib.eu/renate/handle/123456789/7337https://doi.org/10.34657/6384The electric field of attosecond laser pulses can be retrieved from laser-dressed photoionisation measurements, where electron wavepackets that result from single-photon ionisation by the attosecond pulse in the presence of a dressing field are produced. In case of fluctuating dressing laser and/or attosecond pulses, e.g. due to pulse-to-pulse fluctuations of the carrier envelope phase of the infrared laser pulse, commonly applied retrieval algorithms result in the erroneous extraction of the pulse fields. We present a mixed state time-domain ptychography algorithm for the retrieval of pulse ensembles from attosecond streaking experiments. © 2020 The Author(s). Published by IOP Publishing Ltd.enghttps://creativecommons.org/licenses/by/4.0/530attosecond metrologyattosecond pulse characterizationultrafast metrologyArticle