Development of a simplified, multiple-receiver, wind estimation scheme
is presented. The new algorithm is a modification of the three-receiv
er, imaging Doppler interferometry (IDI3) technique, which estimates t
he location of scattering centers and their corresponding radial veloc
ities. Using the estimated location of the scattering centers, a solut
ion for the three components of the wind vector is obtained. The modif
ication presented is based on a weighted least squares solution of the
radial velocity equation. Many IDI3-like analyses are hampered by the
use of a threshold that determines whether a scattering center is ''g
ood'' or ''bad.'' Using the weighted least squares solution simplifies
the IDI3 procedure by eliminating the need for a threshold. It should
be noted that the results obtained by IDI3 are extremely sensitive to
the thresholding scheme used. In addition to eliminating the need for
the thresholding procedure, the new algorithm greatly reduces the mea
surement variance in the horizontal wind estimates. Data collected fro
m the Middle and Upper (MU) Atmosphere radar are used to substantiate
the technique.