Journal
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
Volume 125, Issue 2, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2019JA027433
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Funding
- European Union's FP7 Programme [213007]
- Academy of Finland [307411, 314982, 316223, 321882]
- RFBR [18-32-00062, 19-52-60003]
- NRF [19-52-60003]
- MEPhI Academic Excellence Project [02.a03.21.0005]
- International Space Science Institute [441]
- Academy of Finland (AKA) [316223, 314982, 316223, 314982] Funding Source: Academy of Finland (AKA)
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An updated yield function for a standard NM64 neutron monitor (NM) is computed and extended to different atmospheric depths from sea level to 500 g/cm(2) (similar to 5.7 km altitude) and is presented as lookup tables and a full parametrization. The yield function was validated using the cosmic ray spectra directly measured in space by the AMS-02 experiment during the period May 2011 through May 2017 and confronted with count rates of all NM64-type NMs being in operation during this period. Using this approach, stability of all the selected NMs was analyzed for the period 2011-2017. Most of NMs appear very stable and suitable for studies of long-term solar modulation of cosmic rays. However, some NMs suffer from instabilities like trends, apparent jumps, or strong seasonal waves in the count rates.
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