Smithsonian Institution ______________________ Asset Name: media:NASM-A19740641000_CU01 File Usage: Not determined There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page at https://www.si.edu/Termsofuse ______________________ Object details: Object Name: Antenna, Radar, LM Landing, Apollo Smithsonian Record ID: edanmdm:nasm_A19740641000 Object Name Antenna, Radar, LM Landing, Apollo Metadata Usage Not determined Guid http://n2t.net/ark:/65665/nv9acda3c43-2ee3-4b79-a330-bef50fca77e5 Data Source National Air and Space Museum Manufacturer Teledyne Ryan Aeronautical Materials HAZMAT: Cadmium Plating, Magnesium Materials Aluminum, Mylar (Polyester), Acrylic (Plexiglas), Gold Plating, Kapton (Polymide), Aluminized Kapton, Rubber (Silicone) Dimensions 3-D: 50.8 x 63.5 x 35.6cm (20 x 25 x 14 in.) Summary 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. Country of Origin United States of America Credit Line Transferred from the National Aeronautics and Space Administration Inventory Number A19740641000 Type EQUIPMENT-Aerials & Antenna ______________________