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This is the antenna assembly from an engineering test model of the approach radar set used to land on the moon. The antenna was mounted on the lower exterior surface of the Apollo program Lunar Module (LM). The signal from the antenna was fed to a continuous wave doppler radar set that controlled the powered landing. This instrument provided velocity, slant and altitude measurement data to the guidance computer used to manage the retrorockets that slowed the descent of the LM. The radar set was manufactured by the Teledyne Corporation. This antenna and its electronics (A 19740640000) were transferred to NASM from NASA's Johnson Space Flight center in 1974.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin United States of America Type EQUIPMENT-Aerials & Antenna Manufacturer Teledyne Ryan Aeronautical
 Dimensions 3-D: 50.8 x 63.5 x 35.6cm (20 x 25 x 14 in.)
 Materials HAZMAT: Cadmium Plating, Magnesium
Aluminum, Mylar (Polyester), Acrylic (Plexiglas), Gold Plating, Kapton (Polymide), Aluminized Kapton, Rubber (Silicone)
 Inventory Number A19740641000 Credit Line Transferred from the National Aeronautics and Space Administration Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.