Abstract: A tracking receiver includes: a complex sum signal generator to generate a complex sum signal; a complex difference signal generator to generate a complex difference signal; a first correction coefficient storage to store a first correction coefficient represented by a complex number; complex difference signal correcting circuitry to calculate a corrected complex difference signal by correcting the complex difference signal based on the complex sum signal and the first correction coefficient; and an orientation direction error calculator to calculate an orientation direction error based on the corrected complex difference signal and the complex sum signal, the orientation direction error being a difference between an arrival direction and an orientation direction, the arrival direction being a direction from which the radio wave comes and arrives, the orientation direction being a direction in which the antenna is orientated.

Abstract: A tracking receiver includes: a complex sum signal generator to generate a complex sum signal; a complex difference signal generator to generate a complex difference signal; a first correction coefficient storage to store a first correction coefficient represented by a complex number; complex difference signal correcting circuitry to calculate a corrected complex difference signal by correcting the complex difference signal based on the complex sum signal and the first correction coefficient; and an orientation direction error calculator to calculate an orientation direction error based on the corrected complex difference signal and the complex sum signal, the orientation direction error being a difference between an arrival direction and an orientation direction, the arrival direction being a direction from which the radio wave comes and arrives, the orientation direction being a direction in which the antenna is orientated.

Abstract: A line-of-sight (LOS) speed calculator obtains a LOS speed of particles traveling with the atmosphere. A LOS direction corrector corrects a LOS direction using attitude angle information. A wind vector calculator calculates a wind vector expressed with a wind direction and wind speed of the atmosphere at a measurement point by using LOS data including a set of the corrected LOS direction corrected by the LOS direction corrector and the LOS speed obtained by the LOS speed calculator. A shift detection range changer changes a shift detection range that is a divided range of the received signal in the time-domain used for obtaining the Doppler frequency shift to correspond to a range of the received signal reflected by particles at altitudes within a predetermined range including an altitude of the measurement point, on the basis of the attitude angle information.

Abstract: A line-of-sight (LOS) speed calculator obtains a LOS speed of particles traveling with the atmosphere. A LOS direction corrector corrects a LOS direction using attitude angle information. A wind vector calculator calculates a wind vector expressed with a wind direction and wind speed of the atmosphere at a measurement point by using LOS data including a set of the corrected LOS direction corrected by the LOS direction corrector and the LOS speed obtained by the LOS speed calculator. A shift detection range changer changes a shift detection range that is a divided range of the received signal in the time-domain used for obtaining the Doppler frequency shift to correspond to a range of the received signal reflected by particles at altitudes within a predetermined range including an altitude of the measurement point, on the basis of the attitude angle information.