Accession Number : ADA183542

Title :   Multi-Technique Study of Ionospheric Structures Causing Degradation in Trans-Ionospheric Communications Systems.

Descriptive Note : Final rept. 3 Dec 83-31 Jan 87,

Corporate Author : EMMANUEL COLL BOSTON MA

Personal Author(s) : Basu,Sunanda ; Doherty,Patricia ; MacKenzie,Eileen ; Hagan,M P

PDF Url : ADA183542

Report Date : 20 Apr 1987

Pagination or Media Count : 116

Abstract : 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)

Descriptors :   *IONOSPHERE, *SCINTILLATION, *F REGION, *EQUATORIAL REGIONS, *RADIO INTERFEROMETERS, *IONOSPHERIC PROPAGATION, COMMUNICATION AND RADIO SYSTEMS, DEGRADATION, DIAGNOSIS(GENERAL), DRIFT, EQUATORIAL REGIONS, F REGION, GEOMAGNETISM, IONOSPHERE, IONOSPHERIC PROPAGATION, IONS, LATITUDE, PERU, PHASE, RADAR EQUIPMENT, RADIO INTERFEROMETERS, STRUCTURES, VERY HIGH FREQUENCY, ANOMALIES

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE