Details
| Original language | English |
|---|---|
| Title of host publication | 2012 European Frequency and Time Forum |
| Subtitle of host publication | Proceedings |
| Pages | 514-521 |
| Number of pages | 8 |
| Publication status | Published - 13 Jun 2013 |
| Event | 2012 European Frequency and Time Forum, EFTF 2012 - Gothenburg, Sweden Duration: 23 Apr 2012 → 27 Apr 2012 |
Abstract
Group Delay Variations (GDVs) are azimuth and elevation dependent code delays that can limit the accuracy of the GNSS code observables. This contribution focuses on the GDV determination and discusses several solutions with respect to repeatability and separability. On-site tests at a laboratory network as well as simulations of several time links are discussed analyzing the stochastic processes apparently introduced by GDV. The stability of the P3 links are not effected. However, offsets up to 0.6 ns can occur. In a detailed study, GDVs are applied to an inter-continental Precise Point Positioning (PPP) time transfer link. This analysis shows that GDV are not an issue for the stability of the PPP links, since small weights reduce the impact of the P3 GDV. It can be shown that the stochastic process, induced by GDV in a PPP analysis, is similar to a random walk noise, well below the L3 carrier phase observation noise of σφ = 6 mm. Offsets for the receiver clock estimates of up to 0.4 ns are reported for the link WTZS (Wettzell) and Boulder (NIST).
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
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2012 European Frequency and Time Forum : Proceedings. 2013. p. 514-521.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - On the Impact of Group Delay Variations on GNSS Time and Frequency Transfer
AU - Kersten, Tobias
AU - Schön, Steffen
AU - Weinbach, Ulrich
PY - 2013/6/13
Y1 - 2013/6/13
N2 - Group Delay Variations (GDVs) are azimuth and elevation dependent code delays that can limit the accuracy of the GNSS code observables. This contribution focuses on the GDV determination and discusses several solutions with respect to repeatability and separability. On-site tests at a laboratory network as well as simulations of several time links are discussed analyzing the stochastic processes apparently introduced by GDV. The stability of the P3 links are not effected. However, offsets up to 0.6 ns can occur. In a detailed study, GDVs are applied to an inter-continental Precise Point Positioning (PPP) time transfer link. This analysis shows that GDV are not an issue for the stability of the PPP links, since small weights reduce the impact of the P3 GDV. It can be shown that the stochastic process, induced by GDV in a PPP analysis, is similar to a random walk noise, well below the L3 carrier phase observation noise of σφ = 6 mm. Offsets for the receiver clock estimates of up to 0.4 ns are reported for the link WTZS (Wettzell) and Boulder (NIST).
AB - Group Delay Variations (GDVs) are azimuth and elevation dependent code delays that can limit the accuracy of the GNSS code observables. This contribution focuses on the GDV determination and discusses several solutions with respect to repeatability and separability. On-site tests at a laboratory network as well as simulations of several time links are discussed analyzing the stochastic processes apparently introduced by GDV. The stability of the P3 links are not effected. However, offsets up to 0.6 ns can occur. In a detailed study, GDVs are applied to an inter-continental Precise Point Positioning (PPP) time transfer link. This analysis shows that GDV are not an issue for the stability of the PPP links, since small weights reduce the impact of the P3 GDV. It can be shown that the stochastic process, induced by GDV in a PPP analysis, is similar to a random walk noise, well below the L3 carrier phase observation noise of σφ = 6 mm. Offsets for the receiver clock estimates of up to 0.4 ns are reported for the link WTZS (Wettzell) and Boulder (NIST).
UR - http://www.scopus.com/inward/record.url?scp=84877632417&partnerID=8YFLogxK
U2 - 10.1109/EFTF.2012.6502435
DO - 10.1109/EFTF.2012.6502435
M3 - Conference contribution
AN - SCOPUS:84877632417
SN - 9781467319249
SP - 514
EP - 521
BT - 2012 European Frequency and Time Forum
T2 - 2012 European Frequency and Time Forum, EFTF 2012
Y2 - 23 April 2012 through 27 April 2012
ER -