United States. National Aeronautics and Space Administration Search this
Extent:
2 Cubic feet (5 boxes)
Type:
Collection descriptions
Archival materials
Charts
Correspondence
Graphs
Memorandums
Proceedings
Reports
Date:
1959-1980
Summary:
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.
Scope and Contents:
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).
Arrangement:
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
Biographical / Historical:
Andrew R. Chi was head of the Timing Systems Section, Space Data Control Branch, at the Goddard Space Flight Center.
Provenance:
Immediate source of acquisition unknown.
Restrictions:
Collection is open for research.
Rights:
Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Archives Center cost-recovery and use fees may apply when requesting reproductions.
