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Verification of near-field tracking in the ASKAP/CRACO pipeline

Verify and validate near-field tracking of moving satellites within the ASKAP/CRACO search pipeline to enable coherent detection across multiple antennas over multi-second durations for near-field sources at distances of a few thousand kilometers.

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Background

To search for additional sub-pulses associated with the event, the authors examined 0.5 seconds of data but noted a pipeline limitation: near-field tracking of moving satellites has not yet been verified. This affects coherent integration across the array for near-field sources and constrains detection sensitivity for potential additional bursts.

References

Since we have not yet verified the nearfield tracking of objects in our search pipeline, as few as five of the innermost antennas would coherently detect the moving satellite over the full 0.5\,s.

— A nanosecond-duration radio pulse originating from the defunct Relay 2 satellite (2506.11462 - James et al., 13 Jun 2025) in Section 3 (Origin of the burst)