Results 31 to 40 of about 18,991 (299)
PWV Retrieval Performance Evaluation for the Fresh BDS‐3 With Multisource Data
Earth and Space Science, 2023 The entire global operation of the newly launched BDS global navigation satellite system (BDS‐3) was completed in July 2020. After that, a series of performance tests were conducted, such as positioning, navigation, and signal experiments.
Nan Jiang +6 more
doaj +1 more source
Sustained gene expression in the retina by improved episomal vectors [PDF]
, 2014 Gene and cellular therapies are nowadays part of therapeutic strategies for the treatment of diverse pathologies. The drawbacks associated with gene therapy-low levels of transgene expression, vector loss during mitosis, and gene silencing-need to be ...
Ana V. Oliveira +7 more
core +1 more source
Positioning Performance Comparison Between GPS and BDS With Data Recorded at Four MGEX Stations
IEEE Access, 2020 In December 2018, the BeiDou III (BDS-3) basic system was completed and began to provide global services. along with the BeiDou second-generation satellite navigation system (BDS-2) and Beidou first-generation satellite navigation system (BDS-1), the ...
Xiaping Ma +4 more
doaj +1 more source
Computing zeta functions of arithmetic schemes [PDF]
, 2015 We present new algorithms for computing zeta functions of algebraic varieties over finite fields. In particular, let X be an arithmetic scheme (scheme of finite type over Z), and for a prime p let zeta_{X_p}(s) be the local factor of its zeta function ...
Harvey, David
core +1 more source
BDS-3 Integrity Risk Modeling and Probability Evaluation [PDF]
Remote Sensing, 2022 Focusing on the global integrity monitoring performance of the BDS-3, the integrity failure model and effect analysis (IFMEA) of the system space segment and the ground control segment were carried out, and the system integrity risk tree model was established according to the IFMEA results.
Lei Chen 0075 +9 more
openaire +2 more sources
Design and Performance Analysis of BDS-3 Integrity Concept [PDF]
Remote Sensing, 2021 Compared to the BeiDou regional navigation satellite system (BDS-2), the BeiDou global navigation satellite system (BDS-3) carried out a brand new integrity concept design and construction work, which defines and achieves the integrity functions for major civil open services (OS) signals such as B1C, B2a, and B1I.
Cheng Liu +8 more
openaire +2 more sources
Estimation and Analysis of BDS-3 Differential Code Biases from MGEX Observations
Remote Sensing, 2019 The third generation of China’s BeiDou Navigation Satellite System (BDS-3) began to provide global services on 27 December, 2018. Differential code bias (DCB) is one of the errors in precise BDS positioning and ionospheric modeling, but the impacts
Qisheng Wang +5 more
doaj +1 more source
Preliminary Analysis of Intersystem Biases in BDS-2/BDS-3 Precise Time and Frequency Transfer
Remote Sensing, 2022 The Chinese BeiDou global satellite system (BDS-3) and regional system (BDS-2) are predicted to coexist over the next decade. Intersystem biases (ISBs) in BDS-2/BDS-3 play a key role in maintaining the consistency and continuity from the BDS-2 to BDS-3 ...
Pengfei Zhang +5 more
doaj +1 more source
A new receiver clock model to enhance BDS-3 real-time PPP time transfer with the PPP-B2b service
Satellite Navigation, 2023 A new Precise Point Positioning (PPP) service, called the PPP-B2b service, has been implemented in the BeiDou-3 Navigation Satellite System (BDS-3), which brings new opportunities for time transfer.
Yulong Ge +6 more
doaj +1 more source
Remote Sensing, 2022 Since BeiDou Navigation Satellite System (BDS) and Japan’s Quasi-Zenith Satellite System (QZSS) have more visible satellites in the Asia-Pacific region, and navigation satellites of Global Positioning System (GPS), Galileo satellite navigation system ...
Mengyuan Li +4 more
doaj +1 more source