Data Base of Mt.Washington Neutron Monitor

Mt.Washington Neutron Monitor was situated in USA, DURHAM

Latitude: 44.27N
Longitude: -71.30W
Altitude: 1909 m
Rigidity (1965): 1.46 GV
Standard atmoshperic pressure: 805 mb (29.94 inHg)
Barometric coefficient (1987): -0.726 %/mb
SF=6.4 (The mean count is around 160000/hour or 2670/min or 45/sec)

Dr. James M. Ryan
University of New Hampshire
Space Science Center
39 College Road
Morse Hall, Room 310
Durham, NH 03824-3525
Tel: (603) 862-3510
Fax: (603) 862-4685
Secretary: Robbin Pendexter: (603) 862-1061
E-mail Dr. xxx
E-mail Dr. James M. Ryan UNH

Database contents of MT.WASHINGTON neutron monitor data worked from 1955 (12IGY). The interval of accumulation: hourly from 1955; besides, 1-minute data from 1988. An interactive access is possible to this database and FTP as well.

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 pressure (U). Hourly data are presented uncorrected (U) and corrected for atmospheric pressure (P). Pressure corrected hourly data are kept as original (O) and corrected (C).