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2001, Sodankylä Geophysical Observatory publications, ISBN 9789514260254, Volume no. 89., 20
Book
Space Science Reviews, ISSN 0038-6308, 10/2012, Volume 171, Issue 1, pp. 23 - 60
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 03/2016, Volume 587, p. A150
Journal Article
Solar Physics, ISSN 0038-0938, 4/2018, Volume 293, Issue 4, pp. 1 - 6
The method of active-day fraction (ADF) was proposed recently to calibrate different solar observers to standard observational conditions. The result of the... 
Solar activity | Solar observations | Astrophysics and Astroparticles | Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) | Atmospheric Sciences | Solar cycle | Sunspots | Physics | ASTRONOMY & ASTROPHYSICS | Observers | Calibration | Physics - Solar and Stellar Astrophysics
Journal Article
Solar Physics, ISSN 0038-0938, 11/2016, Volume 291, Issue 9, pp. 2829 - 2841
Journal Article
Nature, ISSN 0028-0836, 10/2004, Volume 431, Issue 7012, pp. 1084 - 1087
Direct observations of sunspot numbers are available for the past four centuries, but longer time series are required, for example, for the identification of a... 
C-14 | RECONSTRUCTION | FIELD | MULTIDISCIPLINARY SCIENCES | MAUNDER MINIMUM | LAST MILLENNIUM | BE-10 | SOLAR-ACTIVITY | MODULATION | Solar Activity | Time Factors | Greenhouse Effect | Sunlight | Atmosphere - chemistry | Ice | Trees - growth & development | Carbon Radioisotopes - analysis | Magnetics | Trees - chemistry | Magnetism | Sun | Astronomy | Physics
Journal Article
Journal of Geophysical Research: Space Physics, ISSN 2169-9380, 06/2013, Volume 118, Issue 6, pp. 2783 - 2788
A ground‐based neutron monitor (NM) is a standard tool to measure cosmic ray (CR) variability near Earth, and it is crucially important to know its yield... 
atmosphere | neutron monitor | cosmic rays | geomagnetic cutoff | DESIGN | PARTICLES | SOLAR MINIMUM | EARTHS ATMOSPHERE | DEPENDENCE | MODELS | ASTRONOMY & ASTROPHYSICS | COSMIC-RAYS | MODULATION | Cosmic rays | Astrophysics | Geophysics
Journal Article
Solar Physics, ISSN 0038-0938, 11/2016, Volume 291, Issue 9, pp. 2685 - 2708
Journal Article
Solar Physics, ISSN 0038-0938, 1/2014, Volume 289, Issue 1, pp. 211 - 220
We revisited assessments of the occurrence probability distribution of large events in solar energetic particles (SEP), based on measurements of cosmogenic... 
Flares, energetic particles | Extraterrestrial Physics, Space Sciences | Atmospheric Sciences | Astrophysics and Astroparticles | Cosmic rays, solar | Physics | AL-26 | PROTON EVENTS | AD 774-775 | INCREASE | ASTRONOMY & ASTROPHYSICS | NUCLIDES | Lunar petrology | Solar physics | Solar flares | Moon | Sun | Cosmic rays | Physics - Solar and Stellar Astrophysics
Journal Article