Sum-threshold RFI flagger functions

C/C++

void sdp_sum_threshold_rfi_flagger(const sdp_Mem *vis, const sdp_Mem *thresholds, sdp_Mem *flags, const int64_t max_sequence_length, sdp_Error *status)

Basic RFI flagger based on sum-threshold algorithm.

Array dimensions are as follows, from slowest to fastest varying:

  • vis is 4D and complex-valued, with shape:

    • [ num_timesamples, num_baselines, num_channels, num_polarisations ]

  • thresholds is 1D and real-valued.

    • The size of the array is n, where 2^(n-1) = max_sequence_length .

  • flags is 4D and integer-valued, with the same shape as vis .

  • max_sequence_length is the maximum length of the sum performed by the algorithm.

Parameters:

  • vis – Complex valued visibilities. Dimensions as above.

  • thresholds – List of thresholds, one for each sequence length.

  • flags – Output flags. Dimensions as above.

  • max_sequence_length – Maximum length of the partial sum.

  • status – Error status.

Python

ska_sdp_func.rfi.sum_threshold_rfi_flagger(vis, thresholds, flags, max_sequence_length)

Basic RFI flagger based on sum-threshold algorithm.

Array dimensions are as follows, from slowest to fastest varying:

  • vis is 4D and complex-valued, with shape:

    • [ num_timesamples, num_baselines, num_channels, num_polarisations ]

  • thresholds is 1D and real-valued.

    • The size of the array is n, where 2^(n-1) = max_sequence_length.

  • flags is 4D and integer-valued, with the same shape as vis.

  • max_sequence_length is the maximum length of the sum performed by the algorithm.

Parameters:

  • vis (numpy.ndarray) – Complex valued visibilities. Dimensions as above.

  • thresholds (numpy.ndarray) – List of thresholds, one for each sequence length.

  • flags (numpy.ndarray) – Output flags. Dimensions as above.

  • max_sequence_length (integer) – Maximum length of the partial sum.