The OFO 1 (Orbiting Frog Otolith) satellite was a small life-science satellite instrumented to obtain the first direct recordings of otolith response during prolonged periods of weightlessness. In-dwelling microelectrodes were implanted in the vestibular nerves of two bullfrogs (Rana calestiana) to measure the bioelectric action potential in the animals during weightlessness and during repeated simulated gravity stimulus obtained by activation of a small centrifuge.

RM 1 (Radiation Meteroid) was a secondary payload on the OFO 1 launch to demonstrate the feasibility and accuracy of an advanced radiation dosimetry system and to verify in-flight improved instrumentation to measure meteoroid impact, flux, direction and speed.