Cross-correlation analysis and interpretation of spaced-receiver measurements

Technical Report · Fri Apr 01 00:00:00 EST 1988

OSTI ID:6764038

Costa, E; Fougere, P F; Basu, S

Two algorithms that provide a statistical treatment to the estimation of the parameters of the cross-correlation analysis of spaced-receiver data are reviewed. Their results are compared using signals transmitted by a quasi-stationary polar beacon and received at Goose Bay, Labrador; and transmitted by the orbiting Hilat satellite and received at Tromso, Norway. A good general agreement is displayed in this comparison. The former experiment indicates the possibility of extreme daily variations in the anisotropy of the ground diffraction pattern and in the true drift velocity of the in-situ irregularities. The latter experiment displays geometrical enhancements in the intensity scintillation index S sub 4, in the rms phase fluctuation sigma/sub phi/ and in the axial ration of the ellipse which characterizes the anisotropy of the ground-diffraction pattern, around the region of local L shell alignment of the ray paths. Increases of these parameters also are observed northward of Tromso. These observations are thus consistent with a morphological model for anisotropy of high-latitude nighttime F-region irregularities proposed in the literature. A possible dependence of the results of the spaced-receiver measurements on the receiver baselines is discussed. It is argued that this mechanism could be responsible for the relatively small values of the anisotropy of the diffraction pattern obtained from the Hilat measurements at Tromso.

• Research Organization: Air Force Geophysics Lab., Hanscom AFB, MA (USA)
• OSTI ID: 6764038
• Report Number(s): AD-A-194792/8/XAB; AFGL-TR-88-0118
• Resource Relation: Other Information: Pub. in Radio Science, Vol. 23, No. 2, 141-162(Mar-Apr 1988)
• Country of Publication: United States
• Language: English

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