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What is Operational Non-Identifiability of Single-Epoch Low-Rank RFI Mitigation: Controlled Failure-Mode Analysis and HERA Evidence about?

This document discusses the operational non-identifiability of single-epoch low-rank radio-frequency interference (RFI) mitigation in low-frequency radio astronomy. It highlights that when the scientific signal and structured RFI share singular-vector subspaces, rank selection cannot effectively separate them, leading to contamination of the science signal. The authors provide diagnostics to assess the effectiveness of low-rank cleaning methods in real-world applications, rather than proposing a new algorit

Author

ZeeshanPanhwar

Language

EN