PMID- 33668792
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20210311
LR  - 20210316
IS  - 1424-8220 (Electronic)
IS  - 1424-8220 (Linking)
VI  - 21
IP  - 5
DP  - 2021 Feb 25
TI  - An Investigation of Precise Orbit and Clock Products for BDS-3 from Different 
      Analysis Centers.
LID - 10.3390/s21051596 [doi]
LID - 1596
AB  - A quality evaluation of precise products for BDS-3 constellations is presented 
      for the first time in this contribution. Then, the tropospheric delay retrieval 
      and positioning performance of BDS-3 precise point positioning (PPP) solutions 
      using the precise products (gbm, wum, iac, sha, cnt) with observations from 24 
      stations from DOY 280 to 317 in 2020 was comprehensively investigated. The orbit 
      comparisons present consistencies of 0.09-0.22 m for the C19-C37 satellites and 
      of 0.5-1.2 m for the C38-C46 satellites among the final products. The standard 
      deviation (STD) values of the clock differences of iac showed the best agreement 
      with those of gbm, followed by wum, sha. The clock differences performance of cnt 
      was the worst. For BDS-3 PPP solutions with five Analysis centers (ACs) products, 
      the median convergence times of static PPP mode incorporating the gbm, wum, iac, 
      sha, and cnt products were 31.0, 33.5, 34.5, 37.8, and 72.0 min, respectively; 
      the median convergence times of kinematic PPP model incorporating the same 
      products were 40.5, 41.0, 50.5, 55.0, and 94.0 min, respectively. The positioning 
      accuracies in the static and kinematic modes were approximately 1-4 cm, 2-6 cm in 
      the horizontal and vertical components, respectively. With the final products in 
      kinematic mode, the performance of PPP with real-time products (cnt) is poorer 
      than all PPP with final products. The median of ZTD accuracies of the five 
      products gbm, wum, iac, sha, and cnt were 7.84, 7.58, 7.04, 7.19, and 10.1 mm, 
      respectively, and the accuracy differences were very small among five AC products 
      (gbm, wum, iac, sha).
FAU - Shen, Pengli
AU  - Shen P
AUID- ORCID: 0000-0002-4697-3946
AD  - National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China.
AD  - University of Chinese Academy of Sciences, Beijing 100049, China.
AD  - Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of 
      Sciences, Xi'an 710600, China.
FAU - Cheng, Fang
AU  - Cheng F
AD  - National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China.
AD  - University of Chinese Academy of Sciences, Beijing 100049, China.
AD  - Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of 
      Sciences, Xi'an 710600, China.
FAU - Lu, Xiaochun
AU  - Lu X
AD  - National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China.
AD  - University of Chinese Academy of Sciences, Beijing 100049, China.
AD  - Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of 
      Sciences, Xi'an 710600, China.
FAU - Xiao, Xia
AU  - Xiao X
AD  - National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China.
AD  - University of Chinese Academy of Sciences, Beijing 100049, China.
AD  - Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of 
      Sciences, Xi'an 710600, China.
FAU - Ge, Yulong
AU  - Ge Y
AUID- ORCID: 0000-0001-8988-6212
AD  - National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China.
AD  - University of Chinese Academy of Sciences, Beijing 100049, China.
AD  - Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of 
      Sciences, Xi'an 710600, China.
LA  - eng
PT  - Journal Article
DEP - 20210225
PL  - Switzerland
TA  - Sensors (Basel)
JT  - Sensors (Basel, Switzerland)
JID - 101204366
SB  - IM
PMC - PMC7956526
OTO - NOTNLM
OT  - BDS-3
OT  - analysis centers
OT  - clock differences
OT  - orbit comparison
OT  - positioning performance
OT  - precise point positioning (PPP)
OT  - tropospheric delay
COIS- The authors declare no conflict of interest.
EDAT- 2021/03/07 06:00
MHDA- 2021/03/07 06:01
PMCR- 2021/02/25
CRDT- 2021/03/06 01:03
PHST- 2021/01/22 00:00 [received]
PHST- 2021/02/19 00:00 [revised]
PHST- 2021/02/22 00:00 [accepted]
PHST- 2021/03/06 01:03 [entrez]
PHST- 2021/03/07 06:00 [pubmed]
PHST- 2021/03/07 06:01 [medline]
PHST- 2021/02/25 00:00 [pmc-release]
AID - s21051596 [pii]
AID - sensors-21-01596 [pii]
AID - 10.3390/s21051596 [doi]
PST - epublish
SO  - Sensors (Basel). 2021 Feb 25;21(5):1596. doi: 10.3390/s21051596.