Raw data, corresponding to individual dumps of the correlator buffers every integration time (typically 1 minute) are not stored. Instead, a real-time job applies automatic calibrations (clipping corrections, atmospheric model, etc.) before writing on disk. This pre-calibrated data is archived daily, and later sorted on a project by project basis.
Except for specific experiments, observers will only have access to the sorted data, which contains the source data and all the calibrations measurements required by the observing procedure. Observers will have exclusive access to their data for a fixed amount of time (yet to be specified), but no exclusive rights over the calibration data, which are duplicated in special data files to monitor a posteriori the performance of the interferometer.
Further calibration (RF bandpass, phase and secondary amplitude calibration) is the observer's responsibility. It is also possible to recalibrate the compressed data for atmospheric transmission and receiver temperature. Recalibrating the IF bandpass is not possible.