What status does an aircraft have when it is in SIDE-STREAM handoff?

When an aircraft is in SIDE-STREAM handoff, it indicates a transition of radar data from one facility to another without losing track of the aircraft's position and intentions. This process is crucial for ensuring that the aircraft maintains continuous monitoring as it moves from one Air Traffic Control (ATC) facility to another, particularly in an environment using En Route Automation Modernization (ERAM) systems.

During this handoff process, while the aircraft's data is being transferred, it may not be actively managed or tracked at the same level by the original facility. Therefore, it is in transition to another ERAM facility, which means that the data is handed off and will continue to be monitored by the receiving facility. This status is critical for maintaining safety and maintaining the flow of air traffic as aircraft move through different airspace jurisdictions.