Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

Baláž, J.; Дмитриев, А. В.; Kovalevskaya, M. A.; Kudela, K.; Kuznetsov, S. N.; Myagkova, I. N.; Nagornikh, Yu. I.; Rojko, J.; Ryumin, S. P.

doi:10.1017/s0252921100026208

Cited by 4 publications

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“…The instrument's effective photopeak area (at vertical incidence) is 90 cm 2 at 3.2 MeV, and 61 cm 2 at 7.9 MeV. More details are given in Baláž et al (1994).…”

Section: Methodsmentioning

confidence: 99%

Gamma rays in <i>L-B</i> coordinates at CORONAS-I altitude

et al. 2005

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Abstract. We present here observations of gamma rays in the energy range between 3.0 and 8.3 MeV gathered by the SONG instrument aboard low-altitude polar-orbiting satellite CORONAS-I throughout the period March-June 1994. We concentrate on the emissions related to the trapped particles and organize CORONAS-I measurements in the magnetic L−B coordinate system. The spatial distribution of the average gamma-ray counts reveals that the most intense fluxes were observed under the inner radiation belt, at L<2, and that they are exclusively confined into the region of stably trapped particles, where daughter gamma rays could result from the interactions within the spacecraft and instrumental matter. In the outer radiation zone (L∼4), the enhanced gamma radiation, also detected outside the stably trapping region, shows pronounced longitudinal variations. The observed eastward increase in the gamma-ray count rate suggests quasi-traped energetic (megavolt) electrons as a source of the gamma rays both in the upper atmosphere and in the satellite matter, most likely, through the bremsstrahlung process in the studied energy domain.

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“…The instrument's effective photopeak area (at vertical incidence) is 90 cm 2 at 3.2 MeV, and 61 cm 2 at 7.9 MeV. More details are given in Baláž et al (1994).…”

Section: Methodsmentioning

confidence: 99%

Gamma rays in <i>L-B</i> coordinates at CORONAS-I altitude

et al. 2005

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“…The instrument's maximum effective area (at vertical incidence) for gamma-ray photons is 270 cm 2 ; the effective photopeak area at 100 keV is 200 cm 2 , and 140 cm 2 at 1 MeV. More details of SONG aboard CORONAS-I are given in Baláž et al (1994). The SONG device was mounted on the platform at a distance of one meter from the satellite.…”

Section: Figmentioning

confidence: 99%

Satellite observations of lightning-induced hard X-ray flux enhancements in the conjugate region

2006

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Abstract. Preliminary examination of October-December 2002 SONG (SOlar Neutron and Gamma rays) data aboard the Russian CORONAS-F (Complex Orbital Near-Earth Observations of the Activity of the Sun) low-altitude satellite has revealed many X-ray enhanced emissions (30–500 keV) in the slot region (L ~ 2–3) between the Earth's radiation belts. In one case, CORONAS-F data were analyzed when the intense hard X-ray emissions were seen westward of the South Atlantic Anomaly in a rather wide L shell range from 1.7 to 2.6. Enhanced fluxes observed on day 316 (12 November) were most likely associated with a Major Severe Weather Outbreak in Eastern USA, producing extensive lightning flashes, as was documented by simultaneous optical observations from space. We propose that whistler mode signals from these lightning discharges cause precipitation of energetic electrons from terrestrial trapped radiation belts, which, in turn, produce atmospheric X-rays in the Southern Hemisphere.

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