Results 51 to 60 of about 4,565,671 (287)

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, Jung Hyun Jo, Young-Jun Choi, Gi-In Cho, Jae-Hyuk Kim, Young-Ho Bae, Hong-Suh Yim, Hong-Kyu Moon, Jang-Hyun Park   +8 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  

Evidence‐Based Clinical Practice Guidelines for the Management of Pediatric Febrile Neutropenia: Resource‐Sensitive Recommendations for the Asian Continent

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Febrile neutropenia (FN) is a frequent and serious complication in children receiving cancer therapy. Standardizing FN management across Asia is challenging due to variable healthcare infrastructure, diagnostic capacity, and infection patterns; however, it could improve resource use and patient outcomes.
Joliza Patricia Cañeba, Shweta Bansal, Tea Reljic, Allyne Montecillo‐Aguelo, Hamidah Alias, Farrah Amaranto, Maria Stella Aquino‐Calingasan, Bambang Ardianto, Eggi Arguni, Sally Blair, Thi Tam Dang, Maria Beatriz Gepte, Samanmalee Gunasekara, Andini Handayani, Miriam Kimpo, Catherine G. Lam, Nawachai Lertvivatpong, Sergio Licona, Ana Loseo, Ratha Mlis, Vivian Moreno Berrio, Nguyen Hoai Anh, Anna Lisa Ong‐Lim, Ha Thu Pham, Krishna Sagar Sharma, Bun Sereyleak, Sally Jane G. Velasco‐Aro, Su Yadana, Ambuj Kumar, Sheena Mukkada   +29 more
wiley   +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, Chengzhi Liu, Zhenwei Li, Zhe Kang   +3 more
doaj   +1 more source

One-Shot Initial Orbit Determination in Low-Earth Orbit

2024 IEEE Aerospace Conference
Due to the importance of satellites for society and the exponential increase in the number of objects in orbit, it is important to accurately determine the state (e.g., position and velocity) of these Resident Space Objects (RSOs) at any time and in a timely manner.
Ricardo Ferreira 0002, Marta Guimarães, Filipa Valdeira, Cláudia Soares   +3 more
openaire   +2 more sources

Neurocognitive, School‐Based, and Quality of Life Outcomes for Youth With Sickle Cell Disease and Thalassemia: A Scoping Review

Pediatric Blood &Cancer, EarlyView.
ABSTRACT The medical burdens of sickle cell disease (SCD) and transfusion‐dependent β‐thalassemia (TDT) are chronic and cumulative, even in children. Yet the effects expand beyond medications and healthcare visits due to their impacts on school attendance, academic performance, and peer engagement.
Mary Ann Etling, Hakim Tokhi, Alexander A. Boucher   +2 more
wiley   +1 more source

Initial Relative Orbit Determination Using Heterogeneous TDOA

, 2017
This paper presents a solution for the initial orbit determination of a space-based RF transmitter using time-difference-of-arrival (TDOA) measurements obtained from space-based receivers in known orbits. Orbit determination requires six independent TDOA
Sinclair, Andrew J., Simon Shuster, Shuster, Simon, Andrew J. Sinclair, T. Alan Lovell, Lovell, T. Alan   +5 more
core   +1 more source

Effectiveness of Resistance Intradialytic Exercise Compared to Aerobic Intradialytic Exercise for Patients With Chronic Kidney Disease: A Randomized Controlled Clinical Trial

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, Gisela Cristiane Miyamoto, Daniel da Costa Torres, Ian Setubal Reis Chaves, Jonas do Carmo Paschoalin, Braúlio Lima Nascimento, Luciana Dias Chiavegato   +6 more
wiley   +1 more source

Precise Orbit Determination Based on the Unscented Transform for Optical Observations

Journal of Astronomy and Space Sciences, 2019
In this study, the precise orbit determination (POD) software is developed for optical observation. To improve the performance of the estimation algorithm, a nonlinear batch filter, based on the unscented transform (UT) that overcomes the disadvantages ...
Hyewon Hwang, Eunji Lee, Sang-Young Park
doaj   +1 more source

Dynamic precise orbit determination of Hayabusa2 using laser altimeter (LIDAR) and image tracking data sets

Earth, Planets and Space, 2020
The precise orbit of the Hayabusa2 spacecraft with respect to asteroid Ryugu is dynamically determined using the data sets collected by the spacecraft’s onboard laser altimeter (LIght Detection And Ranging, LIDAR) and automated image tracking (AIT).
Keiko Yamamoto, Toshimichi Otsubo, Koji Matsumoto, Hirotomo Noda, Noriyuki Namiki, Hiroshi Takeuchi, Hitoshi Ikeda, Makoto Yoshikawa, Yukio Yamamoto, Hiroki Senshu, Takahide Mizuno, Naru Hirata, Ryuhei Yamada, Yoshiaki Ishihara, Hiroshi Araki, Shinsuke Abe, Fumi Yoshida, Arika Higuchi, Sho Sasaki, Shoko Oshigami, Seiitsu Tsuruta, Kazuyoshi Asari, Makoto Shizugami, Naoko Ogawa, Go Ono, Yuya Mimasu, Kent Yoshikawa, Tadateru Takahashi, Yuto Takei, Atsushi Fujii, Tomohiro Yamaguchi, Shota Kikuchi, Sei-ichiro Watanabe, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Takanao Saiki, Yuichi Tsuda   +37 more
doaj   +1 more source