Determination of air density, temperature and winds at high altitude

The report contains a paper entitled 'Latitude and height dependences of solar atmospheric tides'. The latitude dependences are expressed by Hough functions which are presented graphically for symmetric and asymmetric diurnal and semidiurnal modes. Two height dependences are developed for each mode: one is a function which weights the heating rate at any level in proportion to its response in the surface pressure oscillation; the other is a function which weights the heating rate at any level in proportion to its response in the tidal fields at a given higher level. A typical heating rate profile is adopted to which these weighting functions are applied. The surface pressure oscillation and tidal fields at 80 km are discussed in relation to the levels of heating from which they are mainly excited.