RESEARCH OF SOME ASPECT OF ATMOSPHERE DYNAMICS BY
          SYNCHRONOUS ASTROMETRIC AND BAROMETRIC DATA

           V.L.Gorshkov, G.V.Kirian, N.V.Scherbakova
              Pulkovo astronomical observatory
      Pulkovskoe sh. 65/1, St.Petersburg, 196140, Russia

                         D.G.Kirian
        Institute for Problem of Mechanical Engineering
       Bolshoy 61, V.O.,  St.Petersburg, 199178, Russia

     This research  was  made for detection of large-scale atmospheric
waves that have show itself in optical observation through  refraction
perturbation.  That  use  of optical ground observation in dynamics of
Earth atmosphere may be a new field of employment for optical time and
latitude service instruments.
     The data used in this study are based on optical  Universal  Time
(UT)  observations  produced mainly by Pulkovo's photoelectric transit
instruments (PTI) during 1964-1994 and  synchronous  barometric  sets.
The hourly barometric data in St. Petersburg was accumulated from 1845
up today. These UT observations are partly included in the internatio-
nal data-base of individual star observation for new global adjustment
of Earth orientation parameters in Hipparcos reference frame. For pre-
sent  research  these observations were revised in new catalogue based
on readjustment of available for us PTI's observations. That and other
steps  of  data  improving  were made for the best distinction of high
frequency part of investigated spectra.  The averaged spectrum of  the
star  by  star  observation  sets has most of power in range of period
20-40 minutes.  Especially interesting feature of investigated spectra
>from geodynamics point of view is a presence of Chandler period in ba-
rometric set.