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.

Report Date:

1987-04-20

Pagination or Media Count:

116.0

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