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727 documents - page 1 of 37

Seeing the Unseeable: Capturing an Image of a Black Hole

Creator:
National Air and Space Museum  Search this
Type:
Conversations and talks
YouTube Videos
Uploaded:
2020-06-03T00:50:44.000Z
YouTube Category:
Science & Technology  Search this
Topic:
Aeronautics;Flight;Space Sciences  Search this
See more by:
airandspace
Data Source:
National Air and Space Museum
YouTube Channel:
airandspace
EDAN-URL:
edanmdm:yt_YcnMiCSYTnY

Rubidium Frequency Standard, Engineering Model

Maker:
Boeing Company  Search this
Physical Description:
aluminum, steel, rubber, plastic (overall material)
Measurements:
overall: 6 in x 4 1/2 in x 7 1/2 in; 15.24 cm x 11.43 cm x 19.05 cm
Object Name:
rubidium cesium standard
Credit Line:
Gift of The Boeing Company through Francis M. Czopek
ID Number:
2013.0109.02
Accession number:
2013.0109
Catalog number:
2013.0109.02
See more items in:
Medicine and Science: Modern Physics
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746ad-d23f-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_1442285

Cesium Atomic Clock

Maker:
Symmetricom, Incorporated  Search this
Physical Description:
plastic (overall material)
gray (overall color)
metal (overall material)
Measurements:
overall: 5 3/4 in x 16 3/4 in x 19 3/4 in; 14.605 cm x 42.545 cm x 50.165 cm
overall: 5 5/8 in x 16 3/4 in x 20 1/2 in; 14.2875 cm x 42.545 cm x 52.07 cm
Object Name:
atomic clock
Subject:
Modern Physics  Search this
Science & Scientific Instruments  Search this
Credit Line:
Symmetricom, Incorporated
ID Number:
2012.3092.01
Nonaccession number:
2012.3092
Catalog number:
2012.3092.01
Serial number:
US49352868
See more items in:
Medicine and Science: Modern Physics
Time and Navigation
Science & Mathematics
Measuring & Mapping
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746b2-b484-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_1425778
Online Media:

Xibo Zhang, "Making the best atomic clock and using it to study quantum many-body physics"

Creator:
Smithsonian Astrophysical Observatory  Search this
Type:
Lectures
YouTube Videos
Uploaded:
2014-03-31T13:49:12.000Z
YouTube Category:
Science & Technology  Search this
Topic:
Astronomy  Search this
See more by:
ITAMPhysics
Data Source:
Smithsonian Astrophysical Observatory
YouTube Channel:
ITAMPhysics
EDAN-URL:
edanmdm:yt_a3NJ62SOKTw

Andrew Chi Atomic Clocks Collection

Creator:
Chi, Andrew  Search this
Names:
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.
Topic:
Atomic clocks  Search this
Genre/Form:
Charts
Correspondence -- 20th century
Graphs
Memorandums -- 1950-2000
Proceedings
Reports -- 20th century
Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.1264
See more items in:
Andrew Chi Atomic Clocks Collection
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep8f8a1e49d-9a37-4788-b1c0-07d3ff621281
EDAN-URL:
ead_collection:sova-nmah-ac-1264

U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials

Collection Creator:
Chi, Andrew  Search this
Type:
Archival materials
Date:
1964-1980
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.1264, Series 1
See more items in:
Andrew Chi Atomic Clocks Collection
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep805a9ac38-b36b-48b0-9a42-d383421d9b2f
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref572

Other Materials

Collection Creator:
Chi, Andrew  Search this
Type:
Archival materials
Date:
1959-1977
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.1264, Series 2
See more items in:
Andrew Chi Atomic Clocks Collection
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep89491f6ad-3775-4167-8347-0054e0d8f0a2
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref573

U.S. Study Group 7, International Radio Consultative Committee (CCIR), document list

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 1
Type:
Archival materials
Date:
undated
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep8ebd08175-34e0-49fc-8c67-c69f31c00993
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref509

U.S. Study Group 7, International Radio Consultative Committee (CCIR), documents

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 2
Type:
Archival materials
Date:
1964-1966
Scope and Contents:
Includes Technical News from the u.S. Department if Commerice, National Bureua of Standards for January 1965.
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep8f1910a32-70a6-4f0a-be49-a7a74ab9544c
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref510

U.S. Study Group 4, 7, 8, and 9, International Radio Consultative Committee (CCIR), interim meeting, Monte Carlo

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 3
Type:
Archival materials
Date:
1965-1966
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep890359c9c-39e6-4c5b-8143-d3bcce8aff96
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref511

U.S. Study Group 7, International Radio Consultative Committee (CCIR), meeting

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 4
Type:
Archival materials
Date:
1967-01
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep8b41eefd4-7c0e-4fa3-a887-2c9fdcb9cef1
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref512

U.S. Study Group 7, International Radio Consultative Committee (CCIR), meeting

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 5
Type:
Archival materials
Date:
1967-10
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep8c47dc7d4-0923-4fcf-aa18-af5a55444370
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref513

U.S. Study Group 7, International Radio Consultative Committee (CCIR), meeting, Boulder, Colorado

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 6
Type:
Archival materials
Date:
1968
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep85446a149-7c64-4ef8-a845-b3990857b6fc
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref514

U.S. Study Group 7, International Radio Consultative Committee (CCIR), standard frequencies and time-signals, Boulder

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 7
Type:
Archival materials
Date:
1968-07
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep87d92ded4-2fb6-4bc2-bfc7-f68b770a481d
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref515

U.S. Study Group 7, International Radio Consultative Committee (CCIR), report, final meeting, Geneva, Switzerland

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 8
Type:
Archival materials
Date:
1969
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep85bcfdf20-3566-4bf9-81d4-3c056625ea39
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref516

U.S. Study Group 7, International Radio Consultative Committee (CCIR), interim meeting, Geneva, Switzerland

Collection Creator:
Chi, Andrew  Search this
Container:
Box 1, Folder 9
Type:
Archival materials
Date:
1969-1971
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep802da75dd-11ac-4968-8b95-427dcef20d97
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref517

U.S. Study Group 7, International Radio Consultative Committee (CCIR), definitions and terminology

Collection Creator:
Chi, Andrew  Search this
Container:
Box 2, Folder 1
Type:
Archival materials
Date:
1969-1975
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep8a8bdc863-11be-4969-8552-8998b9241c92
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref518

U.S. Study Group 7, International Radio Consultative Committee (CCIR), International Working Party

Collection Creator:
Chi, Andrew  Search this
Container:
Box 2, Folder 2
Type:
Archival materials
Date:
1970-09
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep85c1d2e34-3ec8-42f5-814d-83a1585b54fe
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref519

U.S. Study Group 7, International Radio Consultative Committee (CCIR)

Collection Creator:
Chi, Andrew  Search this
Container:
Box 2, Folder 3
Type:
Archival materials
Date:
1971
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep841355951-208a-4d4c-afc8-ad1654f8f911
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref520

U.S. Study Group 7, International Radio Consultative Committee (CCIR), interim meeting, Geneva, Switzerland

Collection Creator:
Chi, Andrew  Search this
Container:
Box 2, Folder 4
Type:
Archival materials
Date:
1971-02
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Andrew Chi Atomic Clocks Collection, Archives Center, National Museum of American History.
See more items in:
Andrew Chi Atomic Clocks Collection
Andrew Chi Atomic Clocks Collection / Series 1: U.S. Study Group 7, International Radio Consultative Committee (CCIR) Materials
Archival Repository:
Archives Center, National Museum of American History
GUID:
https://n2t.net/ark:/65665/ep8e0603f61-2f33-43a7-9820-f35a2150b78d
EDAN-URL:
ead_component:sova-nmah-ac-1264-ref521

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