Rfi mitigation in weather radar data

A non-transitory computer-readable medium having computer-readable instructions stored thereon that are executable by a processor to perform or control performance of operations comprising:

• computing p norms of radials of weather radar data to construct an p norm profile of the weather radar data as a function of azimuth angle, the weather radar data comprising Level 2 or higher weather radar data in polar format;
• determining that a given radial in the weather radar data is a radio frequency interference (RFI) radial based on the p norm profile of the weather radar data;
• and
• displaying an image from the weather radar data in which at least one of:
• the RFI radial is identified in the image as including RFI;
• or
• the RFI radial is omitted from the image.

A method, comprising:

• computing p norms of radials of weather radar data to construct an p norm profile of the weather radar data as a function of azimuth angle, the weather radar data comprising Level 2 or higher weather radar data in polar format, wherein:
• the weather radar data in polar format includes, for each data point, a magnitude of the corresponding data point and a location of the corresponding data point, the location specified by a radial distance and azimuth angle;
• and
• each radial includes all data points that have an azimuth angle within a given range of azimuth angles across a radial distance range for each azimuth angle within the given range of azimuth angles;
• computing a derivative of the p norm profile with respect to azimuth angle;
• obtaining a radio frequency interference (RFI) kernel, wherein obtaining the RFI kernel comprises one of:
• computing a template RFI kernel to use as the RFI kernel, the template RFI kernel including an approximation of typical radials in an azimuthal neighborhood of RFI;
• deriving a wavelet RFI kernel to use as the RFI kernel, the wavelet RFI kernel derived from data that represents an actual RFI radial and neighboring radials;
• or
• deriving an average wavelet RFI kernel to use as the RFI kernel, the average wavelet RFI kernel derived from data that represents multiple actual RFI radials and respective neighboring radials;
• computing a convolution of the derivative of the p norm profile with the RFI kernel;
• determining that a given radial in the weather radar data includes an RFI radial based on the p norm profile of the weather radar data, including determining that the convolution exceeds a threshold at an azimuth angle of the given radial;
• and
• displaying an image from the weather radar data in which at least one of:
• the RFI radial is identified in the image as including RFI;
• or
• the RFI radial is omitted from the image.