Radio frequency interference (RFI) caused by human communication techniques (e.g., satellites, base stations, and navigation radars) can significantly distort shapes of multichannel time-frequency radio signals. Subsequent astrophysical measurements, such as pulsar timing require finer signal details, therefore, RFI mitigation is necessary.
This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility: Preprocessing for PSR J1645-0317. Left-hand: Panel (1): the observed original data, and Panel (2): baseline removal by Step 1. Right-hand: preliminary excision by Step 2, and signal portions from 1396 to 1556 MHz are shown. Panel (1) (an example of the first way): a threshold η 1 = 10.4 estimated by the pseudo-data D 0. The weak signal structures have been highlighted. Panels (2) and (3) (two examples of the second way): excision results by two selected numerical numbers η 2 = 60 and 100 as thresholds, respectively. Credit: The Astrophysical Journal (2023). DOI: 10.3847/1538-4357/acd170 The current category of linear methods has difficulties in RFI modeling, and the types of RFI removed are limited.…