Results 31 to 40 of about 220,920 (303)
Improving Low Earth Orbit (LEO) Prediction with Accelerometer Data
Remote Sensing, 2020 Low Earth Orbit (LEO) satellites have been widely used in scientific fields or commercial applications in recent decades. The demands of the real time scientific research or real time applications require real time precise LEO orbits.
Haibo Ge +4 more
doaj +1 more source
Routing optimization based on topology control in satellite network
Tongxin xuebao, 2018 A new double-layer satellite network model for space networking was established and a routing algorithm based on topology control (TCRA) was proposed considering the advantages of low earth orbit and stationary earth orbit satellite networks.This model ...
Xiaogang QI, Jiulong MA, Lifang LIU
doaj +2 more sources
Extension of the sun-synchronous Orbit [PDF]
, 2010 Through careful consideration of the orbit perturbation force due to the oblate nature of the primary body a secular variation of the ascending node angle of a near-polar orbit can be induced without expulsion of propellant.
Betts J. T. +12 more
core +1 more source
The Effect of Air Drag in Optimal Power-Limited Rendezvous Between Coplanar Low-Earth Orbits [PDF]
Journal of Astronomy and Space Sciences, 1998 The effect of air drag was researched when a low-earth orbit spacecraft using power-limited thruster rendezvoused another low-earth orbit spacecraft. The air density was assumed to decrease exponentially.
Gil-Young Maeng, Kyu-Hong Choi
doaj
ML-driven cross-calibration of microwave and infrared instruments
Machine Learning. EarthMicrowave (MW) and infrared (IR) observations are fundamental for weather forecasting, climate monitoring, and atmospheric sounding. Traditionally, inter-calibration efforts have focused on harmonizing measurements between similar instruments or within ...
Isaac Moradi, Satya Kalluri
doaj +1 more source
Darkening Low-Earth Orbit Satellite Constellations: A Review
IEEE Access, 2022 The proliferation of low-earth orbit (LEO) satellites and the LEO satellite internet will be a game-changer for the low-latency high-speed global internet.
Ali Lalbakhsh +5 more
doaj +1 more source
FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source
Earth Albedo perturbations on Low Earth Orbit Cubesats [PDF]
International Journal of Aeronautical and Space Sciences, 2013 This work investigates the orbital perturbations of the cubesats that lie on LEO due to Earth albedo. The motivation for this paper originated in the investigation of the orbital perturbations for closed- Earth pico-satellites due to the sunlight reflected by the Earth (the albedo). Having assumed that the Sun lies on the equator, the albedo irradiance
N.S. Khalifa, T.E. Sharaf-Eldin
openaire +1 more source
Low-thrust de-orbiting from Low Earth Orbit through natural perturbations
Acta Astronautica, 2022 This paper investigates two strategies that exploit low-thrust propulsion and natural effects for the complete de-orbiting of spacecraft from a Low Earth Orbit (LEO). The first strategy aims to actively lower the perigee altitude by low-thrust propulsion to achieve passive drag-induced re-entry.
S. Huang +4 more
openaire +3 more sources
Nickel-hydrogen low-Earth-orbit test program [PDF]
, 1986 The incorporation of nickel-hydrogen technology for low-Earth-orbit spacecraft applications requires the establishment of a data base. An extensive test program was established to provide this data base.
Mcdermott, J. K.
core +1 more source