NIRFI Radiophysical Research Institute of the Ministry of Education and Science was founded in 1956 in Gorky, now Nizhny Novgorod. Radio astrophysical.

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NIRFI Radiophysical Research Institute of the Ministry of Education and Science was founded in 1956 in Gorky, now Nizhny Novgorod. Radio astrophysical observatory “Zimenki” Short-term Coronal Mass Ejections’ Prediction Technique Using Solar Radio Emission Olga Sheiner, Vladimir Fridman Radiophysical Research Institute (NIRFI) Nizhny Novgorod

Visible:Photosphere mm-wavesChromosphere cm-waves: up chromosphere & corona bottom dm-waves: low corona metric waves: corona corona Why radio observations?

Growth of amplitude of long-period pulsations with a period of more than 20 min in cm solar radio emission 3 days before registration Coronal Mass Ejections on LASCO MICROWAVE EMISSION 2-3 days before CME registration 2-3 days before CME registration

The detection of steady narrow-band spectral structure in the intensity of microwave radio emission 5-8 hours prior to the event.  f ~ MHz  F ~ 1 sfu August 12, 1989 NOAA/USAF 5638 (S18W90) CME 12:59 UT RT-22 KrAO Spatial resolution 3-4‘ Sweeping spectrograph 14-17GHz 1 spectrum each second 1 spectrum each second 100MHz spectral resolution MICROWAVE EMISSION 8-5 hrs before CME registration 8-5 hrs before CME registration

Halo CMEs broadband precursors MICROWAVE PRECURSORS 2 hrs before CME registration 2 hrs before CME registrationCME CME CME

Qualitative algorithm ~2-3 days ~ 8-5 hours ~ 2 hours T > 20 min long-period pulsations cm radio emission MHz spectral feature in S- component; Sporadic emission; Precursors; CME