Results 31 to 40 of about 598,953 (306)
LEO Enhanced Global Navigation Satellite System (LeGNSS): progress, opportunities, and challenges
Geo-spatial Information Science, 2021 With the completion of Chinese BeiDou Navigation Satellite System (BDS), the world has begun to enjoy the Positioning, Navigation, and Timing (PNT) services of four Global Navigation Satellite Systems (GNSS).
Haibo Ge +8 more
doaj +1 more source
Precise Orbit Determination of CubeSats [PDF]
, 2022 CubeSats are faced with some limitations, mainly due to the limited onboard power and the quality of the onboard sensors. These limitations significantly reduce CubeSats' applicability in space missions requiring high orbital accuracy.
Allahvirdizadeh, Amir
core
Calibration of GRACE on-board accelerometers for thermosphere density derivation
Geo-spatial Information Science, 2022 Low Earth Orbit satellite on-board accelerometers play an important role in improving our understanding of thermosphere density; however, the accelerometer-derived densities are subject to accelerometer calibration errors.
Min Li +5 more
doaj +1 more source
Satellite Navigation, 2022 Geodetic applications of Low Earth Orbit (LEO) satellites requires accurate satellite orbits. Instead of using onboard Global Navigation Satellite System observations, this contribution treats the LEO satellite constellation independently, using Inter ...
X. He +4 more
semanticscholar +1 more source
Precise Orbit Determination of BDS-2 and BDS-3 Using SLR
Remote Sensing, 2019 The BeiDou Navigation Satellite System (BDS) of China is currently in the hybrid-use period of BDS-2 and BDS-3 satellites. All of them are equipped with Laser Retroreflect Arrays (LRAs) for Satellite Laser Ranging (SLR), which can directly obtain an ...
Honglei Yang +4 more
doaj +1 more source
GPS Solutions, 2022 The computational efficiency is critical with the increasing number of GNSS satellites and ground stations since many unknown parameters must be estimated.
Xinghan Chen +3 more
semanticscholar +1 more source
GSTAR: an innovative software platform for processing space geodetic data at the observation level
Satellite Navigation, 2023 To meet the demands for the data combination with multiple space geodetic techniques at the observation level, we developed a new software platform with high extensibility and computation efficiency, named space Geodetic SpatioTemporal data Analysis and ...
Chuang Shi +11 more
doaj +1 more source
BDS Orbit Maneuver Detection Based on Epoch-Updated Orbits Estimated by SRIF
Remote Sensing, 2023 The orbit maneuver detection is crucial in Global Navigation Satellite System (GNSS) precise orbit determination, which is necessary for adjusting data processing strategies.
Zhiwei Qin +5 more
doaj +1 more source
Satellite Positioning and Orbit Determination System (SPODS): Introduction and Evaluation [PDF]
Journal of Geodesy and Geoinformation Science, 2018 The Satellite Positioning and Orbit Determination System (SPODS) is a software package for GNSS positioning/orbit determination, developed by the Xi’an Research Institute of Surveying and Mapping.
Ziqing WEI,Rengui RUAN,Xiaolin JIA,Xianbing WU,Xiaoyong SONG,Yue MAO,Laiping FENG,Yongxing ZHU
doaj
The Araucaria Project: High-precision orbital parallax and masses of eclipsing binaries from infrared interferometry [PDF]
A&A 632, A31 (2019), 2019 Context. The precise determinations of stellar mass at $\sim$1% provide important constraints on stellar evolution models. Accurate parallax measurements can also serve as independent benchmarks for the next Gaia data release. Aims. We aim at measuring the masses and distance of binary systems with a precision level better than 1% using a fully ...
arxiv +1 more source