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The article focuses on the study of satellites without complex equipment. The method is based on the Doppler shift, the apparent decrease of pitch noted when a source of sound, such as a train whistle, rushes past the observer. Radio-equipped satellites are in effect whistling objects. The distance of the satellite is determined by measuring the pitch of the sound at brief intervals during the period.

The article evaluates the Unopar, a sound wave and Doppler-effect based machine that provides a three dimensional picture hand and body movements, developed by Washington University professor and Industrial Engineering Department head Gerald Nadler.

The article focuses on the development of the Transit I-B, a Navy satellite, which was blasted into space from Cape Canaveral in Florida. The use of Transit I-B has been viewed efficient for the quick rebroadcast of the orbit-predicting data to the satellite. The development of the navigation system follows the Doppler effect of Johann Christian Doppler, an Austrian physicist.