Patent ID: 8947296
Filing Date: 2015-02-03
Classification: G01S

Abstract:
1. A method comprising: transmitting a first transmitted narrowband radar signal having a substantially constant first frequency, the first transmitted narrowband radar signal being characterized by a first transmitted power; concurrently transmitting a second transmitted narrowband radar signal having a substantially constant second frequency, the second transmitted narrowband radar signal being characterized by a second transmitted power; measuring a first received power of a first received measurement signal that includes at least a portion of the first transmitted narrowband radar signal that was returned from an object, and a second received power of a second received measurement signal that includes at least a portion of the second transmitted narrowband radar signal that was returned from the object; calculating an atmospheric attenuation factor based on the transmitted and received powers; calculating a range of the object based on the calculated atmospheric attenuation factor and on an atmospheric attenuation coefficient factor.