Institution: | * University of Massachusetts Lowell, Center for Atmospheric Research, 450 Aiken Street, Lowell, MA 01854, U.S.A. ** Phillips Laboratory, GPIM, Hanscom AFB, MA, U.S.A. *** Boston College, Institute for Space Research, Chestnut Hil, MA, U.S.A. |
Abstract: | On behalf of an URSI Working Group 3 initiated study (VIM), three ionospheric models, IRI, PL/PRISM and FLIP, are compared with electron density profiles derived from ionograms Millstone Hill. Four months of data in 1989/90 were analyzed. For most of the time, N(h) profiles were available every 15 minutes providing a good statistical database for the evaluation of the ionospheric models in terms of diurnal and seasonal variations. |