Deutsch
 
Datenschutzhinweis Impressum
  DetailsucheBrowse
  1. Detailsuche  / 
  2. Datensatz ansehen

Datensatz

DATENSATZ AKTIONENEXPORT
 
 
DownloadE-Mail
 Lokale TagsFreigabegeschichteDetailsÜbersicht
  Geodetic measurements and quantitative evaluation for reduced gravitational redshift uncertainty of optical frequency standards

Ichikawa, R., Hachisu, H., Sekido, M., Ido, T., Hiraoka, Y., Harima, E., Fukaya, S., Matsuo, K., Nakashima, M., Hattori, A., Aoyama, Y., Fukuda, Y., Imanishi, Y., Honda, R., Kazama, T. (2023): Geodetic measurements and quantitative evaluation for reduced gravitational redshift uncertainty of optical frequency standards, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0456

Item is

 

einblenden: alle ausblenden: alle

Basisdaten

einblenden: ausblenden:
Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016003 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016003_2
Genre: Konferenzbeitrag

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Ichikawa, Ryuichi1, Autor
Hachisu, Hidekazu1, Autor
Sekido, Mamoru1, Autor
Ido, Tetsuya1, Autor
Hiraoka, Yoshifumi1, Autor
Harima, Eiichirou1, Autor
Fukaya, Shuntaro1, Autor
Matsuo, Koji1, Autor
Nakashima, Masahiro1, Autor
Hattori, Akihisa1, Autor
Aoyama, Yuichi1, Autor
Fukuda, Yoichi1, Autor
Imanishi, Yuichi1, Autor
Honda, Ryo1, Autor
Kazama, Takahito1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Inhalt

einblenden:
ausblenden:
Schlagwörter: -
 Zusammenfassung: The National Institute of Information and Communications Technology (NICT) has developed a Sr optical lattice clock and optical ion clocks employing In+ and Ca+. The centimeter-level uncertainty of site elevation is the cause of 10^(-18)-level frequency uncertainties of optical frequency standards. It is significantly important to understand frequency changes caused by solid-earth tides that often range from 10 to 20 cm in amplitude, by oceanic tidal loading, crustal deformations due to earthquakes, and ground movements with groundwater changes for the stable operation of optical atomic clocks. NICT and partners including the Geospatial Information Authority of Japan (GSI) have been jointly conducting leveling surveys and relative gravimeter observations at NICT’s headquarters in Koganei. These observations reduce the contribution of gravitational redshift to the total uncertainty of the optical lattice clock to the 10^(-19) level. With the support of National Institute of Polar Research (NIPR), absolute gravity measurements were performed in August 2019 and May 2022 to evaluate the effects of the 2011 off the Pacific coast of Tohoku Earthquake on postseismic crustal movement. The obtained absolute gravity change between the two periods was -43.8 μGal, which matches the trend of GNSS vertical movement obtained by GSI. We have introduced a Micro-g LaCoste’s gPhoneX gravimeter for continuous gravity measurements nearby the optical clocks in the end of 2021 and have started to investigate the temporal variation of the ground water level in Koganei. We will present preliminary results of these geodetic measurements.

Details

einblenden:
ausblenden:
Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.57757/IUGG23-0456
 Art des Abschluß: -

Veranstaltung

einblenden:
ausblenden:
Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: - Identifikator: -