Results 21 to 30 of about 2,111,313 (164)

Illumination Model of Lunar Terrain around Lunar Laser Retroreflectors Based on LOLA Data

Remote Sensing
Lunar laser retroreflectors are a crucial target for lunar laser ranging (LLR). During LLR operations at all lunar laser ranging stations, the considerable distance between the Earth and the Moon makes it impossible to visually identify the position of ...
Yuzuo Li, Xida Han, Xianlin Wu, Xudong Lin, Qianji Zhao, Chengkai Zhou, Yong Yan   +6 more
doaj   +1 more source

Advantages of combining Lunar Laser Ranging and Differential Lunar Laser Ranging [PDF]

, 2023
Context. Differential Lunar Laser Ranging (DLLR), which is planned to be conducted at Table Mountain Observatory (TMO) of Jet Propulsion Laboratory (JPL) in the future, is a novel technique for tracking to the Moon.
Müller, Jürgen, Biskupek, Liliane, Zhang, Mingyue   +2 more
core   +2 more sources

Test of Einstein Equivalence Principle by frequency comparisons of optical clocks

Physics Letters B, 2021
The Einstein Equivalence Principle (EEP) carries a pivotal role in understanding theory of gravity and spacetime. It guarantees the gravity to be understood as geometric phenomenon.
ChengGang Qin, YuJie Tan, ChengGang Shao
doaj   +1 more source

Reduction and analysis of one-way laser ranging data from ILRS ground stations to LRO [PDF]

, 2013
One-way LR (Laser Ranging) is being performed routinely from ILRS (International Laser Ranging Service) ground stations to LOLA (Lunar Orbiter Laser Altimeter), onboard NASA’s LRO (Lunar Reconnaissance Orbiter).
Schreiber, Ulli, Smith, David, Neumann, Gregory, McGarry, Jan, Mao, Dandan, Torrence, Mark, Oberst, Jürgen, Hussmann, Hauke, Zuber, Maria, Mazarico, Erwan, Bauer, Sven, Gläser, Philipp   +11 more
core  

Autonomous Orbit Determination of LLO Satellite Using DRO–LLO Links and Lunar Laser Ranging

Aerospace
A stable and high-precision autonomous orbit determination scheme for a Low Lunar Orbit (LLO) spacecraft is proposed, leveraging satellite-to-satellite tracking (SST) measurement data and lunar laser ranging data.
Shixu Chen, Shuanglin Li, Jinghui Pu, Yingjie Xu, Wenbin Wang   +4 more
doaj   +1 more source

A review of the lunar laser ranging technique and contribution of timing systems

South African Journal of Science, 2016
The lunar laser ranging (LLR) technique is based on the two-way time-of-flight of laser pulses from an earth station to the retroreflectors that are located on the surface of the moon.
Cilence Munghemezulu, Ludwig Combrinck, Joel O. Botai   +2 more
doaj   +1 more source

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

Analysis and application of 1-way laser ranging data from Wettzell station to LRO [PDF]

, 2012
One-way LR (Laser Ranging) is performed routinely from ILRS (International Laser Ranging Service) ground stations to the LOLA (Lunar Orbiter Laser Altimeter) instrument which is onboard NASA’s LRO (Lunar Reconnaissance Orbiter).
Hussmann, Hauke, Mazarico, Erwan, Smith, David, Neumann, Gregory, McGarry, Jan, Mao, Dandan, Torrence, Mark, Oberst, Jürgen, Herold, Günther, Zuber, Maria, Schreiber, Ullrich, Sven, Bauer, Gläser, Philipp   +12 more
core  

Combination of Lunar Laser Ranging and Differential Lunar Laser Ranging

, 2022
Lunar laser ranging (LLR), i.e., range measurements from an Earth station to a lunar reflector, is carried out for more than 53 years. LLR is important for many fields, e.g., lunar ephemeris, relativity tests and lunar interior modelling. However, due to
Singh, Vishwa Vijay, Müller, Jürgen, Biskupek, Liliane, Zhang, Mingyue   +3 more
core  

Hexapod Locomotion Across Structured and Unstructured Terrains: A Data‐Driven Review of Modeling, Control, and Validation

Journal of Field Robotics, EarlyView.
ABSTRACT The design of a hexapod is complex and requires integration between kinematic models, control systems, and sensing. Existing literature has reviewed these sub‐systems in isolation. Since 2021, there has been no review of the field despite significant advancements in soft soil, lunar traversal, and artificial intelligence.
Akhil Rampersad, Bashan Naidoo
wiley   +1 more source