Results 21 to 30 of about 142,927 (339)

Evaluation of strategies for the ultra-rapid orbit prediction of BDS GEO satellites

Geo-spatial Information Science, 2023
The quality of BeiDou Navigation Satellite System (BDS) Geostationary Earth Orbit (GEO) ultra-rapid products is unsatisfactory because GEO satellites are nearly stationary relative to ground stations.
Wenxi Zhao, Xiaolei Dai, Yidong Lou, Yaquan Peng, Xueyong Xu   +4 more
doaj   +1 more source

Multiple solutions for asteroid orbits: Computational procedure and applications [PDF]

, 2005
We describe the Multiple Solutions Method, a one-dimensional sampling of the six-dimensional orbital confidence region that is widely applicable in the field of asteroid orbit determination.
A. Milani, Boattini, Carpino, G. Tommei, M. E. Sansaturio, Marsden, Milani, Milani, Milani, Milani, O. Arratia, S. R. Chesley   +11 more
core   +1 more source

An optimal design of the broadcast ephemeris for LEO navigation augmentation systems

Geo-spatial Information Science, 2022
As the deployment of large Low Earth Orbiters (LEO) communication constellations, navigation from the LEO satellites becomes an emerging opportunity to enhance the existing satellite navigation systems.
Xueli Guo, Lei Wang, Wenju Fu, Yingbo Suo, Ruizhi Chen, Hongxing Sun   +5 more
doaj   +1 more source

Analysis of Orbit Accuracy for Non-cooperative Earth-Orbiting Objects

Open Astronomy, 2019
The atmospheric resistance and solar radiation pressure are the main sources of non-gravitational perturbations in orbit determination and prediction of non-cooperative earth-orbiting objects.
Jianrong Chen, Junfeng Li
doaj   +1 more source

Research on the Rotational Correction of Distributed Autonomous Orbit Determination in the Satellite Navigation Constellation

Remote Sensing, 2022
The autonomous orbit determination of the navigation constellation uses only bidirectional ranging data of the inter-satellite link for data processing.
Wei Zhou, Hongliang Cai, Ziqiang Li, Chengpan Tang, Xiaogong Hu, Wanke Liu   +5 more
doaj   +1 more source

Prediction of tissue decompression in orbital surgery [PDF]

Clinical Biomechanics, 2004
Objective: A method to predict the relationships between decompressed volume of orbital soft tissues, backward displacement of globe after osteotomy, and force exerted by the surgeon, was proposed to improve surgery planning in exophthalmia reduction.
Luboz, Vincent, Pedrono, Annaig, Ambard, Dominique, Boutault, Franck, Payan, Yohan, Swider, Pascal   +5 more
openaire   +3 more sources

Orbital Mixer: Using Atomic Orbital Features for Basis-Dependent Prediction of Molecular Wavefunctions

Journal of Chemical Theory and Computation, 2022
Leveraging ab initio data at scale has enabled the development of machine learning models capable of extremely accurate and fast molecular property prediction. A central paradigm of many previous works focuses on generating predictions for only a fixed set of properties.
Kirill Shmilovich, Devin Willmott, Ivan Batalov, Mordechai Kornbluth, Jonathan Mailoa, J. Zico Kolter   +5 more
openaire   +3 more sources

ZY3-02 Laser Altimeter Footprint Geolocation Prediction

Sensors, 2017
Successfully launched on 30 May 2016, ZY3-02 is the first Chinese surveying and mapping satellite equipped with a lightweight laser altimeter. Calibration is necessary before the laser altimeter becomes operational. Laser footprint location prediction is
Junfeng Xie, Xinming Tang, Fan Mo, Guoyuan Li, Guangbin Zhu, Zhenming Wang, Xingke Fu, Xiaoming Gao, Xianhui Dou   +8 more
doaj   +1 more source

Predicting The Orbit of TRAPPIST-1i [PDF]

Research Notes of the AAS, 2018
AAS Research ...
openaire   +2 more sources

Research on Enhanced Orbit Prediction Techniques Utilizing Multiple Sets of Two-Line Element

Aerospace, 2023
Acquiring accurate space object orbits is crucial for many applications such as satellite tracking, space debris detection, and collision avoidance. The widely used two-line element (TLE) method estimates the position and velocity of objects in space ...
Junyu Chen, Chusen Lin
doaj   +1 more source