Cosmic Ray Survey to Antarctica and Coupling Functions for Neutron Component Near Solar Minimum (1996-1997) 2. Meteorological Effects and Correction of Survey Data
Abstract We present an analysis of the atmospheric effects influencing the counting rate of a NM-64 neutron monitor and bare neutron counters utilized during the latitude survey performed in 1996-1997 from Italy to Antarctica and back. We determine the influence of Bernoulli effect on the evaluation...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1081.9142 http://lss.fnal.gov/conf2/C990817/s3_6_04.pdf |
| Summary: | Abstract We present an analysis of the atmospheric effects influencing the counting rate of a NM-64 neutron monitor and bare neutron counters utilized during the latitude survey performed in 1996-1997 from Italy to Antarctica and back. We determine the influence of Bernoulli effect on the evaluation of atmospheric mass and the effect of sea-state on the neutron counting rate, by using the data recorded during the time spent in Antarctic region (cut-off rigidity R cp ≤1 GV); then, accurate values of atmospheric pressure coefficients are computed. The survey data are corrected for the above effects; atmospheric pressure coefficients changing with cut-off rigidity are computed by combining previous findings together with our determinations at R cp ≤1 GV. It is estimated the temperature effect on the NM counting rate; the survey data are corrected by using the sea-level temperature during the expedition and the data of atmospheric temperature vertical distribution measured by NOOA-9 and NOOA-10 satellites. |
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