Results 31 to 40 of about 99,959 (290)

ASTROD and ASTROD I -- Overview and Progress [PDF]

open access: yes, 2007
In this paper, we present an overview of ASTROD (Astrodynamical Space Test of Relativity using Optical Devices) and ASTROD I mission concepts and studies.
Anderson J. D.   +14 more
core   +1 more source

LEO Precise Orbit Determination with Inter-satellite Links

open access: yesRemote Sensing, 2019
Traditional precise orbit determination (POD) for low Earth orbit (LEO) satellites relies on observations from ground stations and onboard receivers.
Xingxing Li   +5 more
doaj   +1 more source

LEO Satellite Clock Modeling and Its Benefits for LEO Kinematic POD

open access: yesRemote Sensing, 2023
High-accuracy Low Earth Orbit (LEO) satellite clock and orbital products are preconditions to realize LEO augmentation for high-accuracy GNSS-based positioning on the ground.
Kan Wang, Ahmed El-Mowafy, Xuhai Yang
doaj   +1 more source

Space-Time Reference with an Optical Link

open access: yes, 2015
We describe a method for realizing a high-performance Space-Time Reference (STR) using a stable atomic clock in a precisely defined orbit and synchronizing the orbiting clock to high-accuracy atomic clocks on the ground.
Berceau, Paul   +3 more
core   +1 more source

Ab Initio Calculation of Relativistic Corrections to the Static Interquark potential I: SU(2) Gauge Theory [PDF]

open access: yes, 1996
We test the capability of state-of-the-art lattice techniques for a precise determination of relativistic corrections to the static interquark potential, by use of SU(2) gauge theory.
A. Barchielli   +41 more
core   +2 more sources

Precise Orbit Determination of BDS MEO Satellites Based on Satellite TT&C Stations

open access: yesInternational Journal of Aerospace Engineering, 2016
A novel method, which is based on the triple-frequency combination and Space-Based Telemetry, Tracking, and Command (STT&C) stations, is proposed in this paper.
Kezhao Li   +5 more
doaj   +1 more source

Precise Orbit Determination for BeiDou GEO/IGSO Satellites during Orbit Maneuvering with Pseudo-Stochastic Pulses

open access: yesRemote Sensing, 2019
In order to provide better service for the Asia-Pacific region, the BeiDou navigation satellite system (BDS) is designed as a constellation containing medium earth orbit (MEO), geostationary earth orbit (GEO), and inclined geosynchronous orbit (IGSO ...
Zhiwei Qin   +7 more
doaj   +1 more source

Precise Orbit Determination of FY-3C with Calibration of Orbit Biases in BeiDou GEO Satellites

open access: yesRemote Sensing, 2018
The emerging BeiDou navigation satellite system has contributed to global precise positioning and has recently moved toward space-borne applications.
Qiang Zhang   +3 more
doaj   +1 more source

A More Reliable Orbit Initialization Method for LEO Precise Orbit Determination Using GNSS

open access: yesRemote Sensing, 2020
Precise orbit determination (POD) using GNSS has been rapidly developed and is the mainstream technology for the navigation of low Earth orbit (LEO) satellites. The initialization of orbit parameters is a key prerequisite for LEO POD processing.
Xuewen Gong   +3 more
doaj   +1 more source

Real‐World Pediatric Blinatumomab Administration: Access to Outpatient Care Delivery and Impact of a Hospital‐Dispensed Model

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Blinatumomab has been shown to be highly effective for patients with pediatric B‐ALL and has recently become standard of care therapy. Due to its past use in the clinical trial setting, there is limited information available about real‐world administration.
Katelyn Oranges   +12 more
wiley   +1 more source

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