Patent ID: 11879970
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 10:
11. A signal processing method using a weather parameter found based on a reception signal of a reflected wave of pulsed undulation repeatedly transmitted into a space, a Doppler spectrum derived from the reception signal, and a topographic-echo-removed spectrum resulting from removal of a topographic echo from the Doppler spectrum, the signal processing method comprising:
distinguishing an echo by finding a first mixed region including a region where at least a weather echo and the topographic echo are together present based on a weather parameter among weather parameters that is different in behavior between the weather echo and the topographic echo;
determining an echo region by finding a weather echo region where a Doppler velocity is zero based on the weather parameter;
reconstructing a weather echo region by determining as a second mixed region, a region other than an overlapping region in the first mixed region where the first mixed region and the weather echo region where the Doppler velocity is zero overlap with each other, determining the weather echo region where the Doppler velocity is zero as a common region, determining a combined region based on a logical sum of the second mixed region with the common region as the weather echo region, and substituting a value of the second mixed region with a value resulting from removal of the topographic echo; and
causing a display to display the reconstructed weather echo region.