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

Claim 7:
8. 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 second weather echo region based on a weather parameter among the weather parameters, a behavior of which is not dependent on a Doppler velocity;
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 second weather echo region overlap with each other, determining as a common region, a portion in the overlapping region that corresponds to the second weather echo region, determining a combined region based on a logical sum of the second mixed region with the common region as a 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 the weather echo region.