ATLAS Electroweak Measurements With Early Data

The large W and Z cross sections expected at the LHC allow for several measurements involving electroweak bosons already in the early data. The W and Z cross sections can be measured with good accuracy with an integrated luminosity in the range between 10 and 100 pb-1. These crosssections are presently predicted with an uncertainty of about 5%, mostly due to PDF uncertainty. In particular the ratio of W and Z cross-sections being not affected by the uncertainty on the machine luminosity can be used to extract SM parameters like GW with competitive accuracy. The Z momentum and rapidity distribution measurements will allow to constrain PDFs and QCD calculations, quickly surpassing the predictions in precision. Also the W charge asymmetry will quickly become precisely measured. ATLAS strategies and expectations are discussed, using selected examples of expectations for measurements.