Results 81 to 90 of about 9,599 (294)
Autonomous Orbit Determination of LLO Satellite Using DRO–LLO Links and Lunar Laser Ranging
AerospaceA 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 +4 more
doaj +1 more source
Satellite laser ranging measurements in South Africa: Contributions to earth system sciences
South African Journal of Science, 2015 This contribution reassesses progress in the development of satellite laser ranging (SLR) technology and its scientific and societal applications in South Africa.
Christina M. Botai +2 more
doaj +1 more source
Advanced Functional Materials, EarlyView.In this work, we highlight a unique material platform capable of producing three distinct room temperature (RT) photoluminescence (PL) resonances from spatially separated regions composed of a heterobilayer (HBL), a homobilayer (HoBL), and an heterotrilayer (HTL) transition metal dichalcogenide (TMD) heterostructures configuration on a highly ...
Bhabani Sankar Sahoo +8 more
wiley +1 more source
Laser Ranging to Space Debris: Overcoming Challenges. [PDF]
, 2023 Space debris laser ranging systems are a valuable asset complementing existing observation technology for space surveillance, space situational awareness and space traffic management.
Schildknecht, Thomas +1 more
core
Geodetic Studies by Laser Ranging to Satellites [PDF]
, 2013 For three months in 1970, two Goddard Space Flight Center (GSFC) laser tracking systems were used to try to detect the motion of the pole of rotation of the earth. More than two hundred passes of the Beacon Explorer C spacecraft were observed as it passed between the two stations, and these data were used to determine the orbital inclination of the ...
David E. Smith +2 more
openaire +1 more source
Advanced Functional Materials, EarlyView.A non‐aqueous, solution‐based graphene‐wrapping strategy is shown to stabilize disordered rocksalt LMTOF cathodes without structural degradation. The graphene‐wrapped cathode suppresses oxygen loss and parasitic interfacial reactions, lowers impedance growth, and delivers improved cycling stability and rate capability compared with conventional ball ...
Venkata Sai Avvaru +14 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou +6 more
wiley +1 more source
Alternative wavelengths for laser ranging [PDF]
, 1993 The following are considered to be necessary to accomplish multicolor laser ranging: the nature of the atmospheric dispersion and absorption, the satellite/lunar/ground retro-array characteristics, and ground/satellite ranging machine performance.
Hamal, Karel
core +1 more source
Accelerated ice-sheet mass loss in Antarctica from 18-year satellite laser ranging measurements
Annals of Geophysics, 2016 Accurate estimate of the ice-sheet mass balance in Antarctic is very difficult due to complex ice sheet condition and sparse in situ measurements. In this paper, the low-degree gravity field coefficients of up to degree and order 5 derived from Satellite
Shuanggen Jin +2 more
doaj +1 more source
Advanced Functional Materials, EarlyView.The intrinsic distortion‐rich lattice of HEPBA with GQD‐enabled microstrain engineering establishes a mechanistic route toward high‐performance alkaline hydrogen evolution reaction. HEPBA inherently feature heterogeneous local coordination environments arising from multimetal incorporation, while properly introducing GQD during coprecipitation ...
Mia Rinawati +10 more
wiley +1 more source