Results 81 to 90 of about 1,482 (190)
A 4D tomographic ionospheric model to support PPP-RTK
Journal of Geodesy, 2019 Successful implementation of integer ambiguity resolution enabled precise point positioning (aka PPP-RTK) algorithms is inextricably linked to the ability of a user to perform near real-time positioning by quickly and reliably resolving the integer carrier-phase ambiguities.
G. Olivares-Pulido +5 more
openaire +4 more sources
Performance of PPP and PPP-RTK with new-generation GNSS constellations and signals
Satellite NavigationThe expansion of Global Navigation Satellite Systems (GNSS) and Regional Navigation Satellite Systems (RNSS), along with broadcasting of additional signals, offers more options for Precise Point Positioning (PPP). Utilizing a number of constellations and
Xiaohong Zhang +6 more
doaj +1 more source
An Improved Long-Period Precise Time-Relative Positioning Method Based on RTS Data
Sensors, 2020 The high precision positioning can be easily achieved by using real-time kinematic (RTK) and precise point positioning (PPP) or their augmented techniques, such as network RTK (NRTK) and PPP-RTK, even if they also have their own shortfalls.
Yangwei Lu +5 more
doaj +1 more source
센티미터 급 광역 보강항법 시스템의 반송파 위상 기반 보정정보 생성 알고리즘에 관한 연구 [PDF]
, 2020 학위논문(박사)--서울대학교 대학원 :공과대학 기계항공공학부,2020. 2. 기창돈.Recently, the demand for high-precision navigation systems for centimeter-level service has been growing rapidly for various Global Navigation Satellite System (GNSS) applications.
김동욱
core
Development and Realisation of a Real-Time High Precision Positioning SSR-RTK Service for the North Sea Exclusive Economic Zone [PDF]
, 2022 In a two-year research and development project, the prototype of a GNSS (Global Navigation Satellite System) based real-time service using a SSR-RTK (State Space Representation-Real Time Kinematic) approach was developed for the German exclusive economic
Jahn, Cord-Hinrich +6 more
core +1 more source
Improving PPP-RTK with a Self-validation Grid-Based Ionospheric Model
, 2023 The rapid convergence of PPP-RTK depends on the ionospheric correction including the accuracy and prior information. However, the traditional grid-based ionospheric model often uses fixed ionospheric prior information without taking into account the spatiotemporal diversity of the ionosphere, thus weakening the performance of PPP-RTK and limiting its ...
Han, J., Li, X., Li, X., Wu, Z., Lei, T.
openaire +2 more sources
Phosphatase Dysregulation in Cancer: Signaling Pathways and Therapeutic Opportunities
MedComm – Oncology, Volume 4, Issue 2, June 2025.Schematic depiction of the role of phosphatases in cancer, highlighting their involvement in proliferation, exosome secretion, and immunosuppression. The SHP2 crystal structure (PDB:5EHR) is shown as the representative phosphatase. ABSTRACT Phosphatases are increasingly recognized as critical regulators of cancer biology, with important roles in both ...
Maryam Jama +2 more
wiley +1 more source
Undifferenced and Uncombined GNSS Time Transfer and its Space Applications [PDF]
, 2023 This thesis presents a framework for developing a state-of-the-art undifferenced and uncombined (UDUC) time transfer technique for space applications.
Mi, Xiaolong
core
Trustworthy precise point positioning with global navigation satellite systems
, 2023 With the modernization of the Global Navigation Satellite System (GNSS), GNSS precise point positioning (PPP) technology becomes popular benefiting from its wide coverage and high accuracy.
Zhang, Wenhao
core +1 more source
3D-mapping-aided PPP-RTK for deep urban canyons
, 2023 GNSS precise positioning is challenged in difficult urban environments. The performance of precise positioning, especially integer ambiguity resolution, will be seriously deteriorated by the receptions of complex multipath or NLOS (non-light-of-sight) signals.
Geng, J., Xin, S., Hsu, L.
openaire +2 more sources