Results 51 to 60 of about 2,623 (148)

Real-Time Detection of LEO Satellite Orbit Maneuvers Based on Geometric Distance Difference

Aerospace
Low Earth orbit (LEO) satellites, characterized by low altitudes, high velocities, and strong ground signal reception, have become an essential and dynamic component of modern global navigation satellite systems (GNSS).
Aoran Peng, Bobin Cui, Guanwen Huang, Le Wang, Haonan She, Dandan Song, Shi Du   +6 more
doaj   +1 more source

Real-Time Global Ionospheric Map and Its Application in Single-Frequency Positioning

Sensors, 2019
The prevalence of real-time, low-cost, single-frequency, decimeter-level positioning has increased with the development of global navigation satellite systems (GNSSs).
Liang Zhang, Yibin Yao, Wenjie Peng, Lulu Shan, Yulin He, Jian Kong   +5 more
doaj   +1 more source

GPS and Galileo Precise Point Positioning Performance with Tropospheric Estimation Using Different Products: BRDM, RTS, HAS, and MGEX

Remote Sensing
The performance of Precise Point Positioning (PPP) using different Global Navigation Satellite System (GNSS) product sets, including broadcast ephemerides, International GNSS Service Real-Time Service (IGS-RTS) corrections, Galileo High Accuracy Service (
Damian Kiliszek
doaj   +1 more source

Near real-time LOD prediction using ConvLSTM model through integrating IGS rapid LOD and effective angular momentum

Geo-spatial Information Science
Length of day (LOD), a critical component of Earth orientation parameters (EOP), represents variations in Earth’s rotation rate. It is very difficult to predict accurately due to the effects of atmosphere, ocean, hydrology, the Earth’s internal ...
Kehao Yu, Xiaoya Wang, Zhao Li, Jian Wang, Lihua Li, Weiping Jiang, Kai Yang, Jingwen Long, Yunzhao Li   +8 more
doaj   +1 more source

A BDS-2/BDS-3 Integrated Method for Ultra-Rapid Orbit Determination with the Aid of Precise Satellite Clock Offsets

Remote Sensing, 2019
The accuracy of ultra-rapid orbits is a key parameter for the performance of GNSS (Global Navigation Satellite System) real-time or near real-time precise positioning applications.
Qianxin Wang, Chao Hu, Kefei Zhang
doaj   +1 more source

Delay-Adaptive Federated Filtering with Online Model Calibration for Deep Space Multi-Spacecraft Orbit Determination

Aerospace
Precise orbit determination for multi-spacecraft deep space missions faces challenges including long communication delays, sparse tracking, dynamic model uncertainties, and inefficient data fusion.
Meng Li, Yuanlin Zhang, Jing Kong, Xiaolan Huang, Kehua Shi, Ge Guo, Naiyang Xue   +6 more
doaj   +1 more source

The Effect of Observation Discontinuities on LEO Real-Time Orbital Prediction Accuracy and Integrity

Navigation
Real-time, high-accuracy orbital products for low Earth orbit (LEO) satellites are essential for LEO-augmented real-time positioning, navigation and timing services.
Beixi Chen, Kan Wang, Ahmed El-Mowafy, Xuhai Yang   +3 more
doaj   +1 more source

Performance Improvement of Real Time On-board Orbit Determination using High Precision Orbit Propagator

Journal of the Korean Society for Aeronautical & Space Sciences, 2016
Eun-Hyouek Kim, Byung-Hoon Lee, Sung-Baek Park, Hyeun-Pil Jin, Hyun-Woo Lee, Yun-Hwang Jeong   +5 more
openaire   +2 more sources

Demonstration and Analysis of LEO Real-time Kinematic Precise Orbit Determination with Priori Orbit Constraint ormalsize

Chinese Journal of Space Science, 2019
Yishuai SHI, Jinming HAO, Wenhai JIAO, Ming DONG, Bo JIAO, Weiping LIU   +5 more
openaire   +1 more source

Impact of Satellite Clock Corrections and Different Precise Products on GPS and Galileo Precise Point Positioning Performance. [PDF]

Sensors (Basel)
Kiliszek D, Korolczuk K.
europepmc   +1 more source