PURPOSE: Tape of signals from several early artificial satellites.

DESCRIPTION: Some of the most significant scientific events leading to the launching of the Echo I satellite on August 12, 1960 are described here. Excerpts from messages received from previous artificial satellites in space arre presented, including Sputnik, Explorer, and the Vanguard series. Project Echo sounds are also played, with accompanying narration.

SUGGESTIONS:

REFERENCES: (PIRA unknown.) See descriptive literature in the Demonstration Reference File.

EQUIPMENT: Audiocassette and player.

SETUP TIME: None.