The first day of the four-day meeting held 16-19 August 1966 was devoted to technical descriptions of six radar meteor trail systems. Methods of deriving winds, wind shears and geometric height of the trails were presented on the second day. Discussions of ambipolar diffusion rates and derived atmospheric densities and density-heights were the topics for the third day. On the last day the discussion centered around the use of the data by the meteorologist. The height resolution and data rates needed for climatological, tidal and turbulence studies were delineated. Two papers on wind studies at Sheffield, England and at Adelaide, Australia were presented.

The first day of the four-day meeting held 16-19 August 1966 was devoted to technical descriptions of six radar meteor trail systems. Methods of deriving winds, wind shears and geometric height of the trails were presented on the second day. Discussions of ambipolar diffusion rates and derived atmospheric densities and density-heights were the topics for the third day. On the last day the discussion centered around the use of the data by the meteorologist. The height resolution and data rates needed for climatological, tidal and turbulence studies were delineated. Two papers on wind studies at Sheffield, England and at Adelaide, Australia were presented.

A description of the data taken at AFCRL from 1964 through 1966 and the methods of analyzing the wind data are presented. A least squares fit to the mean, 24-hr, and 12-hr components of the wind was applied to the data, and the results are compared to those obtained by other investigators. (Author).

An advanced, inexpensive, transportable radar meteor trail set was developed and was recommended as an international standard by IUCSTP at the Moscow 1971 COSPAR meeting. The interferometer height-measuring technique, tested with the CRLH 001 Beacon in satellite OV1-17, was also recommended because of ground calibration capability and achieved accuracy. Computer programs for data reduction and advanced analysis were used to reduce and study wind and density data from AFCRL, Eglin AFB, Stanford University and the University of New Hampshire. Results were compared with other investigators' findings. (Author).

The Stanford University Mark II Radar Meteor Trail System was moved to Eglin AFB, Florida for field testing and to make comparison of winds obtained by the rocket, chemical release method and the radar meteor method. Recommendations for locating and maintaining meteor radar systems, as well as modifications for the Mark II system suggested by the aircraft and satellite calibrations and by operating experience, are given. (Author).

Columns of ions left by the passage of meteors through the 80- to 100-km altitude region are used as tracers to monitor the wind and density variations of the high atmosphere. Recent equipment development with pulse-interferometers operating in the 20- to 75-MHz band has made it possible to obtain more accurate information on the location of the reflection point on the ionized meteor trail. Analyses of the wind and density data obtained at AFCRL, at Stanford, California, Durham, New Hampshire, and Eglin AFB, Florida are reviewed. Rocket and meteor trail wind observations were obtained at Eglin AFB and, for a separation of 150 km, show reasonable comparisons within one hour. Poor comparisons at larger space and time separations are attributed to large-scale horizontal eddies (gravity waves). (Author Modified Abstract).

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