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Multi-Technique Study of Ionospheric Structures Causing Degradation in Trans-Ionospheric Communications Systems.
Final rept. 3 Dec 83-31 Jan 87,
EMMANUEL COLL BOSTON MA
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Multiple diagnostics have been used at different latitude regimes of the globe to probe large and small scale ionospheric structures which cause degradation in trans-ionospheric communication systems. It was determined that the equatorial anomaly crest had the most disturbed F-region irregularity environment giving rise to saturated GHz scintillation and phase scintillations as large as 16 radians at 244 MHz. At the magnetic equator a host of techniques during the Project Condor rocket campaign in Peru established that the largest GHz scintillat ions maximize in association with extended 3m backscatter plane structures and that speed-receiver scintillation measurements yield irregularity drift velocitiers in fairly good agreement with the 50 MHz radar interferometer drifts. By combining in-situ data of irregularities with scintillations, a new class of extended VHF scintillation producing irregularities was isolated known as bottomside sinusoidal. Author
APPROVED FOR PUBLIC RELEASE