Andrew Chi Atomic Clocks Collection
name: label: Creator
content: Chi, Andrew
label: Names
content: United States. National Aeronautics and Space Administration
topic: label: Topic
content: Atomic clocks
acqinfo: label: Provenance
content: Immediate source of acquisition unknown.
creator: label: Creator
content: Chi, Andrew
setName: label: See more items in
content: Andrew Chi Atomic Clocks Collection
abstract: label: Summary
content: The collection consists of the papers of scientist Andrew Chi, documenting his work on the Cesium 133 atomic clock, and its relevance to the Global Positioning System.
bioghist: label: Biographical / Historical
content: Andrew R. Chi was head of the Timing Systems Section, Space Data Control Branch, at the Goddard Space Flight Center.
physdesc: label: Extent
content: 2 Cubic feet (5 boxes)
unitdate: label: Date
content: 1959-1980
custodhist: label: Custodial History
content: Collection was found in the Division of Medicine and Science, National Museum of American History, in 2012.
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.1264
objectType: label: Type
content: Collection descriptions
label: Type
content: Archival materials
label: Type
content: Charts
label: Type
content: Correspondence
label: Type
content: Graphs
label: Type
content: Memorandums
label: Type
content: Proceedings
label: Type
content: Reports
arrangement: label: Arrangement
content: The collection is arranged into two series. 

Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials, 1964-1980

Series 2: Other Materials, 1959-1977
processinfo: label: Processing Information
content: Collection processed by Alison Oswald, archivist, 2023.
genre_format: label: Genre/Form
content: Charts
label: Genre/Form
content: Correspondence -- 20th century
label: Genre/Form
content: Graphs
label: Genre/Form
content: Memorandums -- 1950-2000
label: Genre/Form
content: Proceedings
label: Genre/Form
content: Reports -- 20th century
scopecontent: label: Scope and Contents
content: The collections contains correspondence, memorandum, and journal articles related to the Cesium 133 atomic clock. Many of the documents relate to the U.S. Study Group 7, International Radio Consultative Committee (CCIR) which was formed to prepare documents to dtermine the United States position in relating to worldwide service of standard frequency and time-signal emmssions. The CCIR is an advisory arm on technical matters to the International Telecommunicaytions Union (ITU).