SANDIA Located in the high desert of Albuquerque, New Mexico, SANDIA Aerospace was founded in 1997 by a group of avionics professionals to provide high quality avionics products to General, Corporate and Regional airline markets. Major product offerings include the company’s STX 165 Transponder with Built-in Encoder, SAE 5-35 Altitude Encoder, SAC 7-35 Airdata Computer, Avionics Cooling Fans,and MARC 70 interface modules. SANDIA products are offered worldwide by both avionics modification centers and aircraft manufactures.