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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a183542.pdf


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