Results 61 to 70 of about 4,499,219 (309)
Pediatric Blood &Cancer, EarlyView.ABSTRACT Purpose Next‐generation sequencing (NGS) has emerged as a promising approach to improve diagnostic accuracy, but its feasibility in low‐ and middle‐income countries remains unknown. This study characterized the diagnostic landscape and assessed organizational readiness for NGS implementation at two childhood cancer treatment centers in Accra ...
Melissa Carvalho +6 more
wiley +1 more source
A Study on the Strategies of the Positioning of a Satellite on Observed Images by the Astronomical Telescope and the Observation and Initial Orbit Determination of Unidentified Space Objects [PDF]
Journal of Astronomy and Space Sciences, 2011 An optical tracking system has advantages for observing geostationary earth orbit (GEO) satellites relatively over other types of observation system.
Jin Choi +8 more
doaj +1 more source
The Journal of the astronautical sciencesInitial orbit determination for cislunar objects poses challenges due to inherent complexity of underlying dynamics and the potential for unmodeled maneuvers.
Casey Heidrich, Marcus Holzinger
semanticscholar +1 more source
Precise Orbit Determination for ADEOS-II [PDF]
, 2006 We performed the precise orbit determination of ADEOS-II using single frequency GPS data and reviewed the results. JAXA precise orbit determination system is called “GUTS (Global and high accUracy Trajectory determination system)”.
Yamamoto, Y. +3 more
core
A method for perturbed initial orbit determination and correlation of radar measurements [PDF]
, 2020 The increasing number of space debris in orbit leads to a growing workload of space surveillance systems. For objects in Low Earth Orbit, radar systems have to maintain orbits of known objects and detect new ones.
Schildknecht, Thomas +2 more
core +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Patients with chronic kidney disease undergoing hemodialysis commonly experience reduced physical function, fatigue, poor sleep quality, and impaired health‐related quality of life. Intradialytic exercise has been proposed as a non‐pharmacological strategy to improve these outcomes.
Klebson da Silva Almeida +6 more
wiley +1 more source
PhotonicsLeveraging space-based optical platforms for space debris and defunct spacecraft detection presents several advantages, including a wide detection range, immunity to cloud cover, and the ability to maintain continuous surveillance on space targets.
Zhe Zhang +6 more
doaj +1 more source
A New Triangulation Algorithm for Positioning Space Debris
Remote Sensing, 2021 A single electro-optical (EO) sensor used in space debris observation provides angle-only information. However, space debris position can be derived using simultaneous optical measurements obtained from two EO sensors located at two separate observation ...
Long Chen +3 more
doaj +1 more source
Assessment of numerical differentiation methods for kinematic orbit solution of the GRACE mission [PDF]
, 2013 textThe historical method of precise orbit determination is a dynamic approach. However, with the improvement of GPS tracking data and associated tracking networks, two newer methods have been developed: reduced-dynamic and kinematic.
Krishnan, Sandeep Kalyanapuram
core
Dealing with uncertainties in angles-only initial orbit determination
, 2016 A method to deal with uncertainties in initial orbit determination (IOD) is presented. This is based on the use of Taylor differential algebra (DA) to nonlinearly map uncertainties from the observation space to the state space.
Armellin, R. [0000-0002-3516-6428] +5 more
core +1 more source