{"nrhp_refnum":"85002814","name":"Space Flight Operations Facility","other_names":[],"category":"building","location":{"address":"Jet Propulsion Laboratory","address_restricted":false,"city":"Pasadena","county":"Los Angeles County","state":"CA","lat":34.20088138500003,"lon":-118.17423377588374,"geom_source":"nps_gis"},"listed_date":"1985-10-03","is_nhl":true,"nhl_designated_date":"1985-10-03","areas_of_significance":["Community Planning and Development","Other","Engineering"],"significance_levels":["national"],"summary":{"what_it_is":"A three-story government building with a basement at the Jet Propulsion Laboratory in Pasadena, California, built in 1963 and in operation from 1964, which serves as the control center for NASA's Deep Space Network.","why_significant":"The nomination argues it is the hub of the communications network through which NASA controls unmanned spacecraft flying in deep space. Mariner, Viking, Pioneer and Voyager missions were controlled from it for at least part of their flights. It replaced the single-room Explorer 1 control center of 1958 and is described as the resource most closely tied to the laboratory's unmanned planetary exploration program.","narrative":"Mission control for NASA's unmanned planetary explorers sits in a square, three-story building with a basement at the Jet Propulsion Laboratory in Pasadena. Completed in 1963 and operating from 1964, the Space Flight Operations Facility encloses 122,074 square feet, has a rock and concrete exterior, and is air-conditioned to precise tolerances. Its core is the Network Operations Control Center, with control consoles, video displays and the computers that process incoming data. It replaced a single-room control center built in 1958 for the Explorer 1 satellite, which could not support later projects such as Ranger. As the focal point of the Deep Space Network, it sends commands to spacecraft millions of miles away and receives their scientific and engineering data. The Mariner, Viking, Pioneer and Voyager missions were all controlled here for at least part of their flights. The building remains active and has been upgraded continually, and it was recognized as a landmark of early space exploration.","period_of_significance":"1963-Present","architect_builder":"NASA","architectural_style":null,"criteria":[],"status_note":"Described as an active NASA facility in excellent condition, altered by continual modification and equipment upgrades since 1964.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:31.280984-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/85002814_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/85002814/cfc64576ba-800.webp","url_1600":"https://nationalhistoricalregister.com/media/85002814/cfc64576ba-1600.webp","licence":"Public domain","author":"NASA/JPL-Caltech","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Deep-space-op.jpg\" rel=\"noopener\">NASA/JPL-Caltech</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Deep-space-op.jpg"},"district":{"nrhp_refnum":"16000468","name":"Big Creek Hydroelectric System Historic District","url":"https://nationalhistoricalregister.com/districts/california/big-creek-hydroelectric-system-historic-district-16000468/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123857946","wikipedia":"https://en.wikipedia.org/wiki/Space_Flight_Operations_Facility","wikidata":"https://www.wikidata.org/wiki/Q7572351"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/los-angeles-county/space-flight-operations-facility-85002814/"}