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Variations in 18-Mc/s solar and cosmic noise
Symposium - International astronomical union
Apparatus for measuring changes in the received intensity of 18–Mc/s cosmic noise has been in operation at the Sampson Station of the Observatory of Rensselaer Polytechnic Institute since 1957 February. It is similar in principle to the equipment of the High Altitude Observatory on which is based the contribution of the Warwicks  to this Symposium.doi:10.1017/s0074180900050841 fatcat:jdkkglsj3fbmrnhpdidgnd2qw4