Details
| Original language | English |
|---|---|
| Title of host publication | Gravity, Positioning and Reference Frames - Proceedings of the IAG Symposia - GGHS2022 |
| Subtitle of host publication | Gravity, Geoid, and Height Systems 2022; IAG Commission 4: Positioning and Applications, 2022; REFAG2022: Reference Frames for Applications in Geosciences, 2022 |
| Editors | Jeffrey T. Freymueller, Laura Sánchez |
| Publisher | Springer Science and Business Media Deutschland GmbH |
| Pages | 53-62 |
| Number of pages | 10 |
| ISBN (electronic) | 978-3-031-63855-8 |
| ISBN (print) | 9783031638541 |
| Publication status | Published - 15 Sept 2024 |
| Event | IAG International Symposium on Reference Frames for Applications in Geosciences, REFAG 2022 - Thessaloniki, Greece Duration: 17 Oct 2022 → 20 Oct 2022 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 156 |
| ISSN (Print) | 0939-9585 |
| ISSN (electronic) | 2197-9359 |
Abstract
The current generation of optical atomic clocks has reached a fractional frequency uncertainty of 1×10−18 (and beyond) which corresponds to a geopotential difference of 0.1 m2/s2. Those gravitational potential differences can be observed as gravitational redshift when comparing the frequencies of optical clocks. Even temporal potential variations might be determined with precise novel optical atomic clocks onboard of low-orbiting satellites such as SLR-like (e.g. LAGEOS-1/2) and GRACE-like missions. In this simulation study, the potential of precise space-borne optical clocks for the determination of temporal variations of low-degree Earth’s gravity field coefficients are investigated. Different configurations of satellite orbits, i.e. at different altitudes (between 400 and 6000 km) and inclinations, are selected as well as certain assumptions on the clock performance are made. A particular focus is put on how well degree-2 coefficients can be estimated from those optical clock measurements and how it compares to results from SLR.
Keywords
- Optical clock measurements in space, Relativistic geodesy, Temporal long-wavelength Earth’s gravity field variations
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
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Gravity, Positioning and Reference Frames - Proceedings of the IAG Symposia - GGHS2022: Gravity, Geoid, and Height Systems 2022; IAG Commission 4: Positioning and Applications, 2022; REFAG2022: Reference Frames for Applications in Geosciences, 2022. ed. / Jeffrey T. Freymueller; Laura Sánchez. Springer Science and Business Media Deutschland GmbH, 2024. p. 53-62 (International Association of Geodesy Symposia; Vol. 156).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Estimation of Temporal Variations in the Earth’s Gravity Field Using Novel Optical Clocks Onboard of Low Earth Orbiters
AU - Shabanloui, Akbar
AU - Wu, Hu
AU - Müller, Jürgen
N1 - Publisher Copyright: © The Author(s) 2023.
PY - 2024/9/15
Y1 - 2024/9/15
N2 - The current generation of optical atomic clocks has reached a fractional frequency uncertainty of 1×10−18 (and beyond) which corresponds to a geopotential difference of 0.1 m2/s2. Those gravitational potential differences can be observed as gravitational redshift when comparing the frequencies of optical clocks. Even temporal potential variations might be determined with precise novel optical atomic clocks onboard of low-orbiting satellites such as SLR-like (e.g. LAGEOS-1/2) and GRACE-like missions. In this simulation study, the potential of precise space-borne optical clocks for the determination of temporal variations of low-degree Earth’s gravity field coefficients are investigated. Different configurations of satellite orbits, i.e. at different altitudes (between 400 and 6000 km) and inclinations, are selected as well as certain assumptions on the clock performance are made. A particular focus is put on how well degree-2 coefficients can be estimated from those optical clock measurements and how it compares to results from SLR.
AB - The current generation of optical atomic clocks has reached a fractional frequency uncertainty of 1×10−18 (and beyond) which corresponds to a geopotential difference of 0.1 m2/s2. Those gravitational potential differences can be observed as gravitational redshift when comparing the frequencies of optical clocks. Even temporal potential variations might be determined with precise novel optical atomic clocks onboard of low-orbiting satellites such as SLR-like (e.g. LAGEOS-1/2) and GRACE-like missions. In this simulation study, the potential of precise space-borne optical clocks for the determination of temporal variations of low-degree Earth’s gravity field coefficients are investigated. Different configurations of satellite orbits, i.e. at different altitudes (between 400 and 6000 km) and inclinations, are selected as well as certain assumptions on the clock performance are made. A particular focus is put on how well degree-2 coefficients can be estimated from those optical clock measurements and how it compares to results from SLR.
KW - Optical clock measurements in space
KW - Relativistic geodesy
KW - Temporal long-wavelength Earth’s gravity field variations
UR - http://www.scopus.com/inward/record.url?scp=85200653975&partnerID=8YFLogxK
U2 - 10.1007/1345_2023_220
DO - 10.1007/1345_2023_220
M3 - Conference contribution
AN - SCOPUS:85200653975
SN - 9783031638541
T3 - International Association of Geodesy Symposia
SP - 53
EP - 62
BT - Gravity, Positioning and Reference Frames - Proceedings of the IAG Symposia - GGHS2022
A2 - Freymueller, Jeffrey T.
A2 - Sánchez, Laura
PB - Springer Science and Business Media Deutschland GmbH
T2 - IAG International Symposium on Reference Frames for Applications in Geosciences, REFAG 2022
Y2 - 17 October 2022 through 20 October 2022
ER -