Results 41 to 50 of about 12,722 (205)
Simultaneous field‐aligned currents at Swarm and Cluster satellites [PDF]
Geophysical Research Letters, 2015 AbstractWe show for the first time, with direct, multispacecraft calculations of electric current density, and other methods, matched signatures of field‐aligned currents (FACs) sampled simultaneously near the ionosphere at low (~500 km altitude) orbit and in the magnetosphere at medium (~2.5 RE altitude) orbits using a particular Swarm and Cluster ...
M. W. Dunlop +15 more
openaire +5 more sources
Earth and Planetary PhysicsThis article investigates the combination of magnetic data from the MSS-1 and Swarm satellites for improved investigations of Earth’s magnetic field and Geospace. The study highlights the complementary nature of polar-orbiting (Swarm) and low-inclination
Nils Olsen
doaj +1 more source
COOPERATIVE ATTITUDE SYNCHRONIZATION IN SATELLITE SWARMS: A CONSENSUS APPROACH [PDF]
IFAC Proceedings Volumes, 2007 The present paper considers the problem of autonomous synchronization of attitudes in a swarm of spacecraft. Building upon our recent results on consensus on manifolds, we model the spacecraft as particles on SO(3) and drive these particles to a common point in SO(3).
Sarlette, Alain +2 more
openaire +2 more sources
Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing
FEBS Letters, EarlyView.Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley +1 more source
Remote SensingIn this study, we analysed remote sensing data collected during the Beirut port explosion on 4 August 2020 at 15.08 UT. For this purpose, we selected three Low-Earth-Orbit (LEO) satellite missions that passed near the Beirut port explosion site ...
Adel Fathy +6 more
doaj +1 more source
Frontiers in Earth Science, 2022 In this study, we have performed a detailed analysis for the correlation between electron density (Ne) and temperature (Te) at the topside ionosphere.
Rui Yan +11 more
doaj +1 more source
OLFAR a radio telescope based on nano satellites in moon orbit [PDF]
, 2010 It seems very likely that missions with nano-satellites in professional scientific or commercial applications will not be single-satellite missions. Well structured formations or less structured swarms of nano-satellites will be able to perform tasks ...
Bentum, M.J. +2 more
core +3 more sources
Orbit design for future SpaceChip swarm missions in a planetary atmosphere [PDF]
, 2012 The effect of solar radiation pressure and atmospheric drag on the orbital dynamics of satellites-on-a-chip (SpaceChips) is exploited to design equatorial long-lived orbits about the oblate Earth.
Colombo, Camilla, McInnes, Colin
core +1 more source
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
On the Occurrence of GPS Signal Amplitude Degradation for Receivers on Board LEO Satellites
Space Weather, 2020 Transient signal loss of the global positioning system (GPS) has been frequently observed by receivers on board the European Space Agency's Swarm mission when the satellites encounter ionospheric plasma irregularities. In this study we provided the first
Chao Xiong +6 more
doaj +1 more source