Data Base of Jungfrajoch (12IGY) Neutron Monitor
Jungfrajoch Neutron Monitor is
situated in Jungfrajoch, Switzerland
Altitude: 3475 m
Rigidity (2000): 4.49 GV
Standard atmoshperic pressure: 643.0 mb
Barometric coefficient (2004): -0.73%/mb
SF=100 (The mean count is around ?80000/hour or ?1300/min,)
See Source and
Conditions for Data use
Prof. Erwin O. Flückiger or Dr. Rolf Bütikofer
Cosmic Ray Group Physikalisches Institut
University of Bern Sidlerstrasse 5
CH-3012 Bern, Switzerland
Tel: +41-31-631 40 52 (Cosmic Ray Group)
Tel: +41-31-631 44 11 (Space Research)
Tel: +41-31-631 40 56 Prof. Dr.Erwin O. Flückiger,Head of the group, Office B21
Tel: +41-31-631 40 58 Dr.Rolf Bütikofer,Senior technical assistant, Office B28
Tel: +41-31-631 40 58
Fax: +41-31-631 44 05
E-mail Jerwin Flueckiger
E-mail Rolf Buetikofer
Database contents of Jungfrajoch neutron monitor data starting from Okt. 1958 (12IGY).
The interval of accumulation:
hourly [and and 1-minute] since Okt. 1958.
An interactive access is possible to this database and FTP
Interactive access Data in this regime are
available in graphical and in digital presentation as well. All
graphical plots are given relative to "February 1987".
Access by FTP
One-minute data are in directory ftp_NM1, hourly data in
directory ftp_NM. Ground Level Enhancement (GLE) data are in the
GLE directory. One-type data are presented in their own Format:
hourly data in format C, 1-minute data in W format, and GLE data
in GLE format.
There are three types of 1-minute data: neutron
monitor data corrected for atmospheric pressure (C), atmospheric
pressure (P), and neutron monitor data uncorrected for atmospheric
Hourly data are presented uncorrected
(U) and corrected for atmospheric pressure (P).
Pressure corrected hourly data are kept as original (O)
and corrected (C).