NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p16
A. MacKinnon, Sam Rennie
{"title":"Local intermittency measure analysis of neutron monitor data","authors":"A. MacKinnon, Sam Rennie","doi":"10.38072/2748-3150/p16","DOIUrl":"https://doi.org/10.38072/2748-3150/p16","url":null,"abstract":"\u0000 Local Intermittency Measure (LIM) is a development of wavelet analysis particularly suited to the diagnosis of isolated, intermittent events in time series. We construct LIM scalograms \u0000 of Neutron Monitor (NM) data for an example each of a large GLE and a Forbush decrease. Both kinds of event show distinctive LIM signatures. In the case of the Forbush decrease the \u0000 method also identifies a second, much smaller event that took place in the same time period. LIM may thus be a useful tool for automated or semi-automated detection of such events in NM data.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117341554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p20
N. A. Santos, S. Dasso, A. Gulisano, O. Areso, Matías Pereira
{"title":"Calibration of the operative cosmic ray detector at Marambio Base in the Antarctic Peninsula","authors":"N. A. Santos, S. Dasso, A. Gulisano, O. Areso, Matías Pereira","doi":"10.38072/2748-3150/p20","DOIUrl":"https://doi.org/10.38072/2748-3150/p20","url":null,"abstract":"\u0000 During 2019 an Antarctic Space Weather Laboratory was deployed at Marambio base in the Antarctic Peninsula. The main instrument installed was a cosmic ray detector based on \u0000 water Cherenkov radiation (WCD). This detector is the first permanent Antarctic node of the LAGO (Latin American Giant Observatory) Collaboration. Long-term calibrated observations \u0000 of the WCD will be presented here. Finally, the global galactic cosmic rays variability observed with the WCD will be compared with observations of a neutron monitor with similar \u0000 rigidity cut off than the Marambio site.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127835537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p21
S. Poluianov, I. Usoskin, R. Du Toit Strauss
{"title":"Upgrade of electronics of neutron monitors DOMC and DOMB","authors":"S. Poluianov, I. Usoskin, R. Du Toit Strauss","doi":"10.38072/2748-3150/p21","DOIUrl":"https://doi.org/10.38072/2748-3150/p21","url":null,"abstract":"\u0000 DOMC and DOMB neutron monitors (NM) operate at the Concordia research station (Dome C on the Antarctic plateau, 75 o 06’S, 123 o 23’E, 3233 m a.s.l.) since 2015. Their high elevation \u0000 and proximity to the geomagnetic pole provide low atmospheric and geomagnetic cutoffs and, therefore, the exceptionally high sensitivity to low-ener- gy cosmic rays. The instruments \u0000 are the so-called mini neutron monitors with BF 3 -filled counter tubes. DOMC has the standard design with a lead neutron multiplier and DOMB is a so-called “bare” (lead-free) unit. \u0000 We report on a recent upgrade of the electronics heads of these instruments. The new heads have a modular architecture, built upon a single-board computer Raspberry Pi. The upgrade \u0000 increases the capabilities of the instruments in two aspects: (1) measurements, particularly, of cosmic ray multiplicity; (2) remote control and monitoring. The new electronic heads \u0000 register each pulse from a detector, giving a timestamp with microsecond precision, which is crucial for multiplicity measurements. Many important parameters (e.g., high voltage, pulse \u0000 detection thres- holds) can be controlled and adjusted remotely with the new design. High computing power allows performing data processing on the fly. The upgrade increases the\u0000 capability of DOMC and DOMB in cosmic ray measurements and improves control of the operation of the neutron monitors.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130182193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p24
S. Belov, E. Zobnin, V. Yanke
{"title":"Cutoff rigidity and particle trajectories online calculator","authors":"S. Belov, E. Zobnin, V. Yanke","doi":"10.38072/2748-3150/p24","DOIUrl":"https://doi.org/10.38072/2748-3150/p24","url":null,"abstract":"\u0000 Over the years, many authors have developed unique software packages for calculating the geomagnetic cut- off rigidities and the asymptotic directions of particle arrival. \u0000 Such programs are used for mass calculations and require some skill. However, it is often necessary to carry out single calculations with the same accu- racy. For this purpose, \u0000 calculator programs have been created on the basis of already developed software packages. One of such programs, a calculator, is described in this work.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128517714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p17
P. Gololobov, S. Starodubtsev, V. Grigoryev, A. Zverev
{"title":"NMDB database and global survey method","authors":"P. Gololobov, S. Starodubtsev, V. Grigoryev, A. Zverev","doi":"10.38072/2748-3150/p17","DOIUrl":"https://doi.org/10.38072/2748-3150/p17","url":null,"abstract":"\u0000 The method of a global survey developed in the 1970s allows using a world-wide network of neutron monitor stations as a single multidirectional device. Wherein, receiving characteristics \u0000 of each device, which reflects their geometries and geographical positions, are taken into account. Such an approach makes it possible to define the first two angular moments of the \u0000 distribution function of cosmic rays in the interplanetary space at each hour of observation. With the creation in 2008/2009 and subsequent development of an international database of \u0000 neutron monitors NMDB, for the first time it appeared an opportunity to use the global survey method in real-time mode. Such a situation creates a unique possibility to use the results \u0000 not only for scienti- fic researches but also for space weather forecasting. To use the data of the world-wide network of neutron monitors it is necessary to carry preliminary preparations. \u0000 Thereby, in the current work, the main attention is attracted to a solution to some practical questions that arise when using the NMDB in real-time.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"2011 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121673361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p19
C. Kato, W. Kihara, Y. Ko, K. Munakata, S. Uchida, S. Kaimi, R. Kataoka, A. Kadokura, P. Evenson, Yoshiaki Nakamura, K. Murase, S. Miyake
{"title":"A new cosmic ray observation at Syowa Station in the antarctic","authors":"C. Kato, W. Kihara, Y. Ko, K. Munakata, S. Uchida, S. Kaimi, R. Kataoka, A. Kadokura, P. Evenson, Yoshiaki Nakamura, K. Murase, S. Miyake","doi":"10.38072/2748-3150/p19","DOIUrl":"https://doi.org/10.38072/2748-3150/p19","url":null,"abstract":"\u0000 A set of Cosmic Ray detectors was newly installed in Syowa Station, in the Antarctic, to observe CR neutrons and muons simultaneously at the same location. \u0000 The observing system has started working in February 2018 and is in stable operation with a high operation rate, >90%. We describe the new systems and show its stability. \u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132053175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p25
S. Poluianov, I. Usoskin, A. Ibragimov
{"title":"Data management at the Oulu cosmic ray station","authors":"S. Poluianov, I. Usoskin, A. Ibragimov","doi":"10.38072/2748-3150/p25","DOIUrl":"https://doi.org/10.38072/2748-3150/p25","url":null,"abstract":"\u0000 With the recent electronics upgrade of Antarctic neutron monitors (NMs) DOMC and DOMB in 2019, the Oulu cosmic ray station (Sodankylä Geophysical Observatory, Finland) receives a significantly \u0000 larger amount of data than before. This has led to a need for an important upgrade of the configuration of servers working at the station. The new configuration has three types of servers: a \u0000 web-server, a datamaster server and data acquisition machines. The web-server provides a user interface for services of the station: the main website, the GLE database and other services. \u0000 The datamaster is the main server, which stores all data in raw files and a database. Data acquisition machines are computers that directly receive data from the instruments and send the files \u0000 farther to the datamaster server. This work describes technical details of the cosmic ray station setup providing reliable and secure data acquisition, handling and publication.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123150329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p22
Markus Similä, S. Poluianov, I. Usoskin
{"title":"Study of individual pulses at the Antarctic high-altitude neutron monitor DOMC","authors":"Markus Similä, S. Poluianov, I. Usoskin","doi":"10.38072/2748-3150/p22","DOIUrl":"https://doi.org/10.38072/2748-3150/p22","url":null,"abstract":"\u0000 A pair of neutron monitors (NMs) is installed on the high Central Antarctic plateau, at the Concordia station (3200 m altitude) and measures the nucleonic component of nucleonic-muon-electromagnetic \u0000 cascades in- duced by high-energy cosmic rays in the atmosphere. The installation includes two NMs: DOMC, a standard mini-NM, and a bare (lead-free) DOMB NM. The newly installed data acquisition (DAQ) \u0000 system records in- dividual pulses corresponding to mostly neutrons in the detector’s counting tube. Here we analyze different types of pulses and study the distribution of the waiting times between \u0000 individual pulses as well as the pulse height, recorded by the DOMC NM during a quiet period of January 2020. The distribution appears double- peaked with peaks corresponding to the frequency of \u0000 individual atmospheric cascades and the intra-cascade variability, respectively. We discuss also the nature of different components contributing to the pulses and se - paration of the signal from noise. \u0000 It is shown that the waiting-time distribution has distinguished timescales, >30 ms defined by the cosmic-ray induced atmospheric cascades, and < 10 ms reflecting the intra-cascade variability. \u0000 The new DAQ system allows one to study the development of the atmospheric cascade.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114347305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-17DOI: 10.38072/2748-3150/p23
P. Kobelev, L. Trefilova, L. Dorman, Lev Pustilnik, A. Belov, E. Eroshenko, V. Yanke
{"title":"Snow effect on the neutron monitor network for 2018-2019","authors":"P. Kobelev, L. Trefilova, L. Dorman, Lev Pustilnik, A. Belov, E. Eroshenko, V. Yanke","doi":"10.38072/2748-3150/p23","DOIUrl":"https://doi.org/10.38072/2748-3150/p23","url":null,"abstract":"\u0000 In this article, the influence of the surrounding snow cover on the neutron monitors count rate of the world network of neutron monitors was estimated using the method of reference stations. \u0000 The applied technique also makes it possible to estimate the snow cover thickness at the observation point, which was done for more than two dozen stations. A comparison of the data correction \u0000 results for snow is carried out for the case of automatic correction, based on the developed algorithm, and for manual one, with an error estimate.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126318059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NMDB@Home 2020Pub Date : 2021-06-16DOI: 10.38072/2748-3150/P8
D. Lingri, H. Mavromichalaki, A. Belov, E. Eroshenko
{"title":"Precursory signals of Forbush decreases with and without shock wave","authors":"D. Lingri, H. Mavromichalaki, A. Belov, E. Eroshenko","doi":"10.38072/2748-3150/P8","DOIUrl":"https://doi.org/10.38072/2748-3150/P8","url":null,"abstract":"\u0000 Many previous studies have shown that before the beginning of a Forbush Decrease (FD) of the cosmic ray intensity, a precursor signal can be observed. All these surveys were focused on \u0000 FDs that are associated with a sudden storm com- mencement (SSC). In this work we demonstrate that precursors could also be observed in events without a SSC that is determined by an \u0000 abrupt increase of the interplanetary magnetic field. The type of precursory signals and their diversity among the events are the main purpose of this study. We try to figure out \u0000 similarities and differences on the signals and the associated events from both categories in the last fifty years, from 1969 to 2019, using the same selection criteria of the under \u0000 investigation FDs. Simultaneously the orientation of the upcoming solar disturbances in comparison to the way they configure the increase of the interplanetary magnetic field and create \u0000 these signals are discussed.\u0000","PeriodicalId":249025,"journal":{"name":"NMDB@Home 2020","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124612188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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