PMID- 29993576
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20191120
IS  - 1525-8955 (Electronic)
IS  - 0885-3010 (Linking)
VI  - 65
IP  - 8
DP  - 2018 Aug
TI  - An Improved Protocol for Performing Two-Way Satellite Time and Frequency Transfer 
      Using a Satellite in an Inclined Geo-Synchronous Orbit.
PG  - 1475-1486
LID - 10.1109/TUFFC.2018.2842094 [doi]
AB  - Two-way satellite time and frequency transfer (TWSTFT) using satellites in 
      inclined geo-synchronous orbit (IGSO) is fundamentally more difficult than using 
      satellites in geostationary orbit (GEO), due to the fact that IGSO satellites are 
      constantly moving relative to a ground station, which brings in large residual 
      effects. In this paper, we designed a protocol and an algorithm to correct 
      several factors that affect the precision of TWSTFT using IGSO satellites. We 
      used two ground stations, each equipped with sending and receiving channels, to 
      conduct real-time measurements of the distance and the speed of an IGSO 
      satellite, and data collected were used to make appropriate corrections. We 
      tested this concept by conducting TWSTFT experiments using an IGSO satellite 
      (BEIDOU I1-S), and compared the results with that obtained using a GEO satellite 
      (CHINASAT 12). Indeed, the individual components that contribute to the residual 
      effects of TWSTFT measurements using the IGSO satellite were several orders of 
      magnitude greater than that of the GEO satellite. By using our modified protocol, 
      TWSTFT results with an IGSO satellite were well accorded with that of using a GEO 
      satellite; the standard deviation of residuals was less than 0.4 ns, well within 
      the limit for the measurement uncertainty of TWSTFT. Therefore, we have expanded 
      the use of IGSO satellites for TWSTFT. In principle, it should also be applicable 
      to medium earth orbit and other satellites.
FAU - Wang, Wei
AU  - Wang W
FAU - Yang, Xuhai
AU  - Yang X
FAU - Ding, Shuo
AU  - Ding S
FAU - Li, Weichao
AU  - Li W
FAU - Su, Hang
AU  - Su H
FAU - Wei, Pei
AU  - Wei P
FAU - Cao, Fen
AU  - Cao F
FAU - Chen, Liang
AU  - Chen L
FAU - Gong, Jie
AU  - Gong J
FAU - Li, Zhi-Gang
AU  - Li ZG
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20180530
PL  - United States
TA  - IEEE Trans Ultrason Ferroelectr Freq Control
JT  - IEEE transactions on ultrasonics, ferroelectrics, and frequency control
JID - 9882735
EDAT- 2018/07/12 06:00
MHDA- 2018/07/12 06:01
CRDT- 2018/07/12 06:00
PHST- 2018/07/12 06:00 [pubmed]
PHST- 2018/07/12 06:01 [medline]
PHST- 2018/07/12 06:00 [entrez]
AID - 10.1109/TUFFC.2018.2842094 [doi]
PST - ppublish
SO  - IEEE Trans Ultrason Ferroelectr Freq Control. 2018 Aug;65(8):1475-1486. doi: 
      10.1109/TUFFC.2018.2842094. Epub 2018 May 30.