Results 21 to 30 of about 10,695 (212)
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 +5 more
doaj +1 more source
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 +8 more
doaj +1 more source
Improving the Accuracy of the Martian Ephemeris Short-Term Prediction
Advances in Astronomy, 2018 The Chinese Mars exploration mission is planned to be launched in 2020, which includes an orbiter, a lander, and a rover. High precision Martian ephemeris is very important in Mars exploration, especially for the Martian orbit insertion and the Martian ...
Quan Shan +5 more
doaj +1 more source
A Method to Determine BeiDou GEO/IGSO Orbital Maneuver Time Periods
Sensors, 2019 Because there are different types of BeiDou constellations with participating geostationary orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites, the maneuvering frequency of BeiDou satellites is higher than that of other navigation systems ...
Zhiwei Qin +7 more
doaj +1 more source
Reduction of Space Debris Collision Prediction Uncertainty Based on Q-Sat Precise Orbit
Space: Science & Technology, 2023 Collision probability is employed for evaluating whether there will be a dangerous encounter between 2 space objects. The fidelity of the collision probability mainly depends on the accuracies of orbit prediction and covariance prediction for the space ...
Huang Pu +3 more
doaj +1 more source
Satellite Orbit Prediction Using Big Data and Soft Computing Techniques to Avoid Space Collisions
Mathematics, 2021 The number of satellites and debris in space is dangerously increasing through the years. For that reason, it is mandatory to design techniques to approach the position of a given object at a given time.
Cristina Puente +3 more
doaj +1 more source
A Deep Space Orbit Determination Software: Overview and Event [PDF]
Journal of Astronomy and Space Sciences, 2017 This paper presents an overview of deep space orbit determination software (DSODS), as well as validation and verification results on its event prediction capabilities.
Youngkwang Kim +3 more
doaj +1 more source
Aerospace, 2022 Flight dynamics is a topic often overlooked by operators of small satellites without propulsion systems, as two-line elements (TLE) are easily accessible and accurate enough for most ground segment needs.
Clément Jonglez +3 more
doaj +1 more source
A review of real-time multi-GNSS precise orbit determination based on the filter method
Satellite Navigation, 2022 Stable and reliable high-precision satellite orbit products are the prerequisites for the positioning services with high performance. In general, the positioning accuracy depends strongly on the quality of satellite orbit and clock products, especially ...
Yidong Lou +7 more
doaj +1 more source
Organoids in pediatric cancer research
FEBS Letters, EarlyView.Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley +1 more source