Physics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22..337t&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 4, p. 337-340
Physics
12
Anomalies, Cosmic Rays, Flux (Rate), Heliosphere, Interplanetary Medium, Oxygen, Abundance, Heavy Ions, Solar Activity Effects, Solar Wind, Ulysses Mission
Scientific paper
We have studied the latitudinal evolution of the anomalous cosmic ray oxygen component at ULYSSES during its journey to the south pole of the sun. Observations from the Cosmic Ray and Solar Particle Investigation (COSPIN) Low Energy Telescope (LET) at ULYSSES are compared with observations in the vicinity of the Earth, provided by the Heavy Ion Large Telescope (HILT) sensor on the Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) spacecraft. We present results in two oxygen energy ranges from 8 to 12 MeV/n and from 12 to 16 MeV/n over a period from August 1992 until end of May 1994. Only quiet time periods which contain no solar energetic particles are taken into account. The data set covers a latitudinal range of about 50 deg and show for both energy channels a decrease of the SAMPEX to ULYSSES flux ratio equivalent to a positive latitudinal gradient of approximately 2%/degree.
Hovestadt Dieter
Klecker Berndt
Marsden Richard G.
Sanderson T. R.
Trattner K. J.
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