The Los Alamos beacon receiver array

Describes radio receivers that monitor transmissions from beacons on geosynchronous satellites. The receivers can detect ionospheric perturbations of a 300-3000 s period in the electron density integrated from beacon to receiver, for amplitudes as low as (1-2)/spl times/10/sup 13/ m/sup -2/. Data are used in studies of atmospheric acoustic and acoustic-gravity waves.<
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