Open Shared Risk Observing
NRAO has been offering "shared risk" access to the VLA for all users since the EVLA construction project began. The OSRO program has extended this into the EVLA era by providing early access to a number of EVLA correlator capabilities and observing modes that represent a significant improvement over the capabilities of the VLA correlator. They are described in detail in Performance of the EVLA. NRAO will make every effort to ensure projects awarded time under the OSRO program obtain good quality data. The highest risk will be for time-critical observations such as observations of triggered transients or observations coordinated with other observatories.
