The main objectives of these small satellites were to study the plasma, particle, and magnetic-field environment of the Moon and map the lunar gravity field.
Apollo 15 astronauts David R. Scott, Alfred M. Worden and James B. Irwin with PFS-1 subsatellite, designed and built by SSL. Photo courtesy NASA.

Website
science.nasa.gov
Location

Lunar orbit

Type

Engineering, Research

Schedule

1971-1972

Status

Completed

Partners

NASA