These data sets including model data correspond mostly to the upper|
atmosphere between 80 and 1000 km and is archived at the National
Center for Atmospheric Research (NCAR). A detailed catalog of these
upper atmosphere data is available.
The Fabry-Perot Interferometer measures neutral gas temperature and
velocity. The altitude of measurement may not be known precisely (but
can be inferred with additional data), and can range from 90 to 500
km. The current data holding is from Sondre Stromfjord, Greenland (67
N, 51 W), 1988 nominally at 250 km.
The Mesosphere-Stratosphere (MST) Doppler radars measure neutral wind
velocity and turbulence at altitudes of 0 to 100 km. The current data
holding is from Poker Flat, Alaska (65 N, 147 W) and is hourly
averages, more or less continuous from 1979-1985.
Model data includes the Chiu Model which produces height profiles of
electron density for specified location, time and sunspot number;
International Reference Ionosphere (IRI) Model which produces electron
density, neutral temperature, electron temperature, ion temperature
and ion concentrations for five species (O+, H+, He+, O2, NO+) given
location, time and sunspot number; and the Mass Spectrometer
Incoherent Scatter (MSIS) Model which produces neutral atmosphere
parameters (temperature, exospheric temperature and Ar, O2, N2, O, N,
He, H concentrations) given a number of geophysical indices. The 1983
and 1986 versions are available.
Model data assimilation analyses of the Ionosphere produced by
assimilative mapping of ionospheric electrodynamics provides electric
potential patterns, electric fields, and height-integrated
conductivities over the Northern Hemisphere above 50 degrees magnetic
latitude. Patterns are derived from a variety of data sources
(magnetometers, IS radars, coherent radars, satellite measurements of
electron precipitation) starting with statistical patterns applicable
to the geophysical conditions.
General Circulation Models (GCM) include the Thermosphere/Ionosphere
GCM which provides global coverage on a 5 X 5 degree grid between 97
km and 500-700 km of neutral and ionized thermospheric parameters
including neutral winds, neutral temperatures, neutral compositions
(N2, O2, O), electron density, electron temperature, ion temperature
and ion composition (O+, O2+). Model inputs of ion velocity and
auroral deposition parameters are also provided. The Semi-diurnal
tidal model provides amplitudes and phases of the semi-diurnal tide in
the horizontal neutral wind, neutral temperature and geopotential
between 0 and 100 km as a function of latitude and season.