Density variations in the heterosphere

Density variations in upper atmosphere at satellite height

The semiannual variation in the heterosphere - A reappraisal

Representation of heterospheric semiannual variation as density variation with amplitudes as functions of altitud

The shape and location of the diurnal bulge in the upper atmosphere

Shape and location of diurnal bulge in upper atmospher

Atmospheric densities and temperatures from the drag analysis of the San Marco Satellite

Atmospheric densities and temperatures from drag analysis of San Marco satellit

A catalog of atmospheric densities from the drag on five artificial satellites

Atmospheric densities from satellite drag dat

Diurnal and seasonal-latitudinal variations in the upper atmosphere

Diurnal and seasonal-latitudinal variations in upper atmospher

A study of the semiannual density variation in the upper atmosphere from 1958 to 1966, based on satellite drag analysis

Semiannual density variation in upper atmosphere from 1958 to 1966 based on satellite drag analysi

Thermospheric temperature, density, and composition: New models

The models essentially consist of two parts: the basic static models, which give temperature and density profiles for the relevant atmospheric constituents for any specified exospheric temperature, and a set of formulae to compute the exospheric temperature and the expected deviations from the static models as a result of all the recognized types of thermospheric variation. For the basic static models, tables are given for heights from 90 to 2,500 km and for exospheric temperatures from 500 to 2600 K. In the formulae for the variations, an attempt has been made to represent the changes in composition observed by mass spectrometers on the OGO 6 and ESRO 4 satellites

Variations in thermospheric composition: A model based on mass-spectrometer and satellite-drag data

The seasonal-latitudinal and the diurnal variations of composition observed by mass spectrometers on the OGO 6 satellite are represented by two simple empirical formulae, each of which uses only one numerical parameter. The formulae are of a very general nature and predict the behavior of these variations at all heights and for all levels of solar activity; they yield a satisfactory representation of the corresponding variations in total density as derived from satellite drag. It is suggested that a seasonal variation of hydrogen might explain the abnormally low hydrogen densities at high northern latitudes in July 1964