Electronic systems test program Apollo communications system ALSEP command link test report

Abstract

To verify the command link from the unified S-band Manned Space Flight Network (MSFN) to the Apollo Lunar Surface Experiments Package (ALSEP), a series of tests was performed at the Manned Spacecraft Center at Houston, Texas. The ALSEP command link test program was primarily devoted to the investigation of anomalies associated with the Early Apollo Scientific Experiments Package (EASEP), which was placed on the lunar surface by the Apollo 11 astronauts, and the investigation of the effects of two simultaneous uplink (MSFN-ALSEP) signals on the ALSEP. This report contains the results, conclusions, and recommendations concerning the ALSEP tests.