DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
ADA056895
Title:
Prediction of Solar Particle Events and Geomagnetic Activity Using Interplanetary Scintillation Observations from the Iowa Cocoa-Cross Radio Telescope.
Corporate Author:
JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
Report Date:
1978-05-01
Abstract:
Synoptic interplanetary scintillation IPS observations were taken during the summer of 1976 and autumn of 1977 on the University of Iowa COCOA-Cross radio telescope 34.3 MHz, with supplementary observations from the University of Maryland TPT array 38 MHz. A new high sampling rate 10 times per second digital system made it possible to reconstruct the IPS powerspectrum between 0.1-3.0 Hz. The observations, combined with earlier 1974 measurements of integrated IPS power scintillation index, have lead to the conclusion based on theoretical modelling that prediction of activity and associated variations in energetic solar particle events is feasible with a lead time of about 24 hours. The technique depends on the observed broadening of the IPS power spectrum as solar wind density enhancements approach the earth. This effect has been documented for both co-rotating and solar flare-associated plasma disturbances.
Descriptive Note:
Final rept. 1 Apr 76-31 Mar 78,
Pages:
0081
Contract Number:
AFOSR-77-0007
File Size:
34.09MB
