Details
| Original language | English |
|---|---|
| Title of host publication | 55th Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2024 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 105-116 |
| Number of pages | 12 |
| ISBN (electronic) | 9780936406374 |
| Publication status | Published - 2024 |
| Event | 55th Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2024 - Long Beach, United States Duration: 22 Jan 2024 → 25 Jan 2024 |
Publication series
| Name | Proceedings of the Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI |
|---|---|
| Volume | 2024-January |
| ISSN (electronic) | 2333-2085 |
Abstract
Realizing a clock-based geodetic network with a relative uncertainty level of 10-18 has been a significant objective for the scientific community. This network can be utilized for realizing more accurate geodetic reference frames and for testing the fundamental laws of physics, such as the theory of relativity. Typically, optical fibers are connecting optical clocks in such a network. For the last decades, Global Navigation Satellite Systems (GNSSs) have built a trustful and easy-setup method for frequency and time transfer. However, recently optical fiber link networks showed better frequency instability. In this study, we investigate the limits of GNSS-based frequency transfer links with the help of an optical fiber link as ground truth. Therefore, we analyze the GNSS data acquired in a dedicated common-clock experiment over a 52 km baseline. We focus on developing two algorithms to estimate the receiver clock differences, hence the frequency instability. These are the single difference (SD) approach with ambiguity fixing as a common view technique, and precise point positioning as an all in-view technique. We discuss the frequency instability achieved by the optical fiber link as well. We evaluate further the performance by computing the modified Allan deviation for both cases. The results show that the ambiguity-fixed solution of SD-CV improves the relative frequency instability via GNSS to reach the order of 3-5 · 10-17 at one day averaging time. In the optical fiber link, which is the basis of the common clock setup, the round-trip instability shows better performance for all averaging times.
ASJC Scopus subject areas
- Computer Science(all)
- Computer Science Applications
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Mechanical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
55th Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2024. Institute of Electrical and Electronics Engineers Inc., 2024. p. 105-116 (Proceedings of the Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI; Vol. 2024-January).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Comparing Frequency Transfer via GNSS and Fiber in a Common-clock Configuration
AU - Elmaghraby, Ahmed
AU - Krawinkel, Thomas
AU - Schön, Steffen
AU - Kniggendorf, Ann Kathrin
AU - Kuhl, Alexander
AU - Mukherjee, Shambo
AU - Kronjäger, Jochen
AU - Piester, Dirk
PY - 2024
Y1 - 2024
N2 - Realizing a clock-based geodetic network with a relative uncertainty level of 10-18 has been a significant objective for the scientific community. This network can be utilized for realizing more accurate geodetic reference frames and for testing the fundamental laws of physics, such as the theory of relativity. Typically, optical fibers are connecting optical clocks in such a network. For the last decades, Global Navigation Satellite Systems (GNSSs) have built a trustful and easy-setup method for frequency and time transfer. However, recently optical fiber link networks showed better frequency instability. In this study, we investigate the limits of GNSS-based frequency transfer links with the help of an optical fiber link as ground truth. Therefore, we analyze the GNSS data acquired in a dedicated common-clock experiment over a 52 km baseline. We focus on developing two algorithms to estimate the receiver clock differences, hence the frequency instability. These are the single difference (SD) approach with ambiguity fixing as a common view technique, and precise point positioning as an all in-view technique. We discuss the frequency instability achieved by the optical fiber link as well. We evaluate further the performance by computing the modified Allan deviation for both cases. The results show that the ambiguity-fixed solution of SD-CV improves the relative frequency instability via GNSS to reach the order of 3-5 · 10-17 at one day averaging time. In the optical fiber link, which is the basis of the common clock setup, the round-trip instability shows better performance for all averaging times.
AB - Realizing a clock-based geodetic network with a relative uncertainty level of 10-18 has been a significant objective for the scientific community. This network can be utilized for realizing more accurate geodetic reference frames and for testing the fundamental laws of physics, such as the theory of relativity. Typically, optical fibers are connecting optical clocks in such a network. For the last decades, Global Navigation Satellite Systems (GNSSs) have built a trustful and easy-setup method for frequency and time transfer. However, recently optical fiber link networks showed better frequency instability. In this study, we investigate the limits of GNSS-based frequency transfer links with the help of an optical fiber link as ground truth. Therefore, we analyze the GNSS data acquired in a dedicated common-clock experiment over a 52 km baseline. We focus on developing two algorithms to estimate the receiver clock differences, hence the frequency instability. These are the single difference (SD) approach with ambiguity fixing as a common view technique, and precise point positioning as an all in-view technique. We discuss the frequency instability achieved by the optical fiber link as well. We evaluate further the performance by computing the modified Allan deviation for both cases. The results show that the ambiguity-fixed solution of SD-CV improves the relative frequency instability via GNSS to reach the order of 3-5 · 10-17 at one day averaging time. In the optical fiber link, which is the basis of the common clock setup, the round-trip instability shows better performance for all averaging times.
UR - http://www.scopus.com/inward/record.url?scp=85196391457&partnerID=8YFLogxK
U2 - 10.33012/2024.19592
DO - 10.33012/2024.19592
M3 - Conference contribution
AN - SCOPUS:85196391457
T3 - Proceedings of the Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI
SP - 105
EP - 116
BT - 55th Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2024
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 55th Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2024
Y2 - 22 January 2024 through 25 January 2024
ER -