Results 81 to 90 of about 2,425,563 (382)
GNSS rapid precise point positioning enhanced by low Earth orbit satellites
Satellite Navigation, 2023 The Low Earth Orbit (LEO) satellites can be used to effectively speed up Precise Point Positioning (PPP) convergence. In this study, 180 LEO satellites with a global distribution are simulated to evaluate their contribution to the PPP convergence.
Ju Hong +7 more
doaj +1 more source
Basic performance and future developments of BeiDou global navigation satellite system
, 2020 The core performance elements of global navigation satellite system include availability, continuity, integrity and accuracy, all of which are particularly important for the developing BeiDou global navigation satellite system (BDS-3).
Yuanxi Yang, Yue Mao, Bijiao Sun
semanticscholar +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT A 70‐year‐old presents with 6 weeks of progressive bilateral vision loss and headaches. He was also recently treated for presumed sciatica. His exam on admission is notable for poor visual acuity (no light perception), optic nerve atrophy bilaterally with swelling and disc hemorrhage on the left eye and left foot drop.
Malya Sahu, Rohini Samudralwar
wiley +1 more source
A power controller integrating MPPT and S3R topology
Dianzi Jishu YingyongSatellite power systems using direct energy transmission have the advantages of simple circuit structure and high reliability, but the solar array energy utilization rate is low. In contrast, using maximum power point tracking technology can maximize the
Wang Boxin +5 more
doaj +1 more source
Satellite Navigation, 2020 Several noteworthy breakthroughs have been made with the BeiDou Navigation Satellite System (BDS) and other global navigation satellite systems as well as the associated augmentation systems, such as the commissioning of the BDS-3 preliminary system and ...
Rui Li +6 more
doaj +1 more source
Multiplexing modulation design optimization and quality evaluation of BDS-3 PPP service signal
Satellite Navigation, 2022 The Precise Point Positioning (PPP) service of BeiDou-3 Navigation Satellite System (BDS-3) is implemented on its Geostationary Earth Orbit (GEO) satellites.
Cheng Liu +7 more
doaj +1 more source
Evaluation and comparison of satellite precipitation estimates with reference to a local area in the Mediterranean Sea [PDF]
, 2014 Precipitation is one of the major variables for many applications and disciplines related to water resources and the geophysical Earth system. Satellite retrieval systems, rain-gauge networks, and radar systems are complementary to each other in terms of
Hsu, KL +3 more
core +2 more sources
Validation of the CHIRPS satellite rainfall estimates over eastern Africa
Quarterly Journal of the Royal Meteorological Society, 2018 Long and temporally consistent rainfall time series are essential in climate analyses and applications. Rainfall data from station observations are inadequate over many parts of the world due to sparse or non‐existent observation networks, or limited ...
T. Dinku +6 more
semanticscholar +1 more source
Detecting rs‐fMRI Networks in Disorders of Consciousness: Improving Clinical Interpretability
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Preserved resting‐state functional MRI (rs‐fMRI) networks are typically observed in Disorders of Consciousness (DOC). Despite the widespread use of rs‐fMRI in DOC, a systematic assessment of networks is needed to improve the interpretability of data in clinical practice.
Jean Paul Medina Carrion +15 more
wiley +1 more source
PPP–RTK functional models formulated with undifferenced and uncombined GNSS observations
Satellite Navigation, 2022 Technique PPP–RTK combines the advantages of both the Precise Point Positioning (PPP) and the Real-Time Kinematic (RTK) positioning. With the emergence of multi-frequency Global Navigation Satellite System (GNSS) observations, it is preferable to ...
Baocheng Zhang +3 more
doaj +1 more source