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====== TransientX - Lessions learned ====== [[https://github.com/ypmen/TransientX | TransientX github]] ====== The general concept of TransientX ====== TransientX is a powerful to search for single pulses. It analyses the data in several steps during the search that includes also RFI mitigation and clustering of candidates. The following makrs my knowledge as of 2024-07-01. The steps of ''transientx_fil'' are as follows - Skewness/kurtosis filtering - Downsampling - Normalisation - Baseline removal - RFI mitigation (''-z'' options) - De-dispersion - Matched filtering search for single pulses - Clustering of candidates - Plotting ===== Skewness/kurtosis filtering ===== This filtering method is always on and controlled by the ''-zapthre'' option. There is no flag to turn it off directly. However, a high threshold basically disables it. ===== Downsampling ===== Next, the filterbank is downsampled in time and frequency according to the values given by ''--td'' and ''--fd''. Be aware that this is down in addition to values given in the ''ddplan'' Hence, the file might be downsampled multiple times! ===== Normalisation ===== ===== Baseline removal ===== This step is similar to the ''zdot'' option