Results 21 to 30 of about 598,953 (306)
Journal of Geodesy, 2023 High-precision applications of GNSS require accurate calibrations to correct for phase variations of the transmitting antennas. Calibrations distributed by the International GNSS Service (IGS), based upon observations from the global network of ground ...
A. Conrad +3 more
semanticscholar +1 more source
The Araucaria project: High-precision orbital parallaxes and masses of binary stars. I. VLTI/GRAVITY observations of ten double-lined spectroscopic binaries [PDF]
A&A 672, A119 (2023), 2023 We aim to measure very precise and accurate model-independent masses and distances of detached binary stars. Precise masses at the $< 1$% level are necessary to test and calibrate stellar interior and evolution models, while precise and independent orbital parallaxes are essential to check for the next Gaia data releases.
arxiv +1 more source
Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations
Journal of Surveying Engineering, 2022 Precise orbit determination (POD) is the procedure for determining the orbit of a satellite with high accuracy.
A. Allahvirdi-Zadeh +2 more
semanticscholar +1 more source
Remote Sensing, 2022 The Tsinghua scientific satellite is a Chinese spherical micro satellite for Earth gravity and atmospheric scientific measurements. The accurate orbits of this satellite are the prerequisites to satisfy the mission objectives.
Kai Shao +6 more
semanticscholar +1 more source
Geo-Spatial Information Science, 2022 In recent years, the large Low Earth Orbit (LEO) constellations have become a hot topic due to their great potential to improve the Global Navigation Satellite Systems (GNSS) positioning performance.
Xingxing Li +6 more
semanticscholar +1 more source
GLONASS precise orbit determination with identification of malfunctioning spacecraft
GPS Solutions, 2022 Due to the continued development of the GLONASS satellites, precise orbit determination (POD) still poses a series of challenges. This study examines the impact of introducing the analytical tube-wing model for GLONASS-M and the box-wing model for ...
G. Bury +3 more
semanticscholar +1 more source
A Sensitivity Study of POD Using Dual-Frequency GPS for CubeSats Data Limitation and Resources
Remote Sensing, 2020 Making use of dual-frequency (DF) global navigation satellite system (GNSS) observations and good dynamic models, the precise orbit determination (POD) for the satellites on low earth orbits has been intensively investigated in the last decades and has ...
Kan Wang +3 more
doaj +1 more source
Sentinel-6A precise orbit determination using a combined GPS/Galileo receiver
Journal of Geodesy, 2021 The Sentinel-6 (or Jason-CS) altimetry mission provides a long-term extension of the Topex and Jason-1/2/3 missions for ocean surface topography monitoring.
O. Montenbruck +3 more
semanticscholar +1 more source
Precise Model for Small-Body Thermal Radiation Pressure Acting on Spacecraft [PDF]
, 2017 A precise representation of small-body surface thermal radiation pressure effects acting on orbiting spacecraft is discussed. The proposed framework takes advantage of a general Fourier series expansion to compute small-body surface thermal radiation ...
Hesar, Siamak G. +3 more
core +1 more source
Validating Precise Orbit Determination from Satellite-Borne GPS Data of Haiyang-2D
Remote Sensing, 2022 Haiyang-2D (HY-2D) is the fourth satellite in the marine dynamic satellite series established by China. It was successfully launched on 19 May 2021, marking the era of the 3-satellite network in the marine dynamic environment satellite series of China ...
Jinyun Guo +6 more
semanticscholar +1 more source