Results 31 to 40 of about 32,070 (302)

A Review of the Space Environment Effects on Spacecraft in Different Orbits

IEEE Access, 2019
The space environment consists of various complex phenomena, which could have a strong influence on the spacecraft operation in different aspects. Since the very beginning of space exploration, numerous studies have been done on the space environment ...
Yifan Lu, Qi Shao, Honghao Yue, Fei Yang
doaj   +1 more source

Molecular repertoire of Deinococcus radiodurans after 1 year of exposure outside the International Space Station within the Tanpopo mission

Microbiome, 2020
Background The extraordinarily resistant bacterium Deinococcus radiodurans withstands harsh environmental conditions present in outer space. Deinococcus radiodurans was exposed for 1 year outside the International Space Station within Tanpopo orbital ...
Emanuel Ott, Yuko Kawaguchi, Denise Kölbl, Elke Rabbow, Petra Rettberg, Maximilian Mora, Christine Moissl-Eichinger, Wolfram Weckwerth, Akihiko Yamagishi, Tetyana Milojevic   +9 more
doaj   +1 more source

ABPBI/MWCNT for proton radiation shielding in low earth orbit

APL Materials, 2023
When planning for any space mission, shielding against ionizing radiation is essential. Polymers, combined with a nano-filler material to reinforce and enhance the polymer properties, can provide a sufficient radiation shielding function with lower ...
Lionel Fabian Fourie, Lynndle Square, Christopher Arendse, Mandla Msimanga   +3 more
doaj   +1 more source

Self-organising satellite constellation in geostationary Earth orbit [PDF]

, 2015
This paper presents a novel solution to the problem of autonomous task allocation for a self-organizing satellite constellation in Earth orbit. The method allows satellites to cluster themselves above targets on the Earth’s surface.
Colombo, Camilla, Mingotti, Giorgio, McInnes, Colin, Mushet, Garrie   +3 more
core   +1 more source

Low Earth Orbit (LEO)

International Journal of Innovative Science and Research Technology (IJISRT)
Low Earth Orbit (LEO) is a popular topic in the field of space exploration and satellite communication. LEO is a popular orbit for various satellite missions due to its advantageous characteristics.
Abdulrhman W Almulhim, Abdullah A Alnaim
openaire   +2 more sources

Measuring a Low-Earth-Orbit Satellite Network

2023 IEEE 34th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2023
Starlink and alike have attracted a lot of attention recently, however, the inner working of these low-earth-orbit (LEO) satellite networks is still largely unknown. This paper presents an ongoing measurement campaign focusing on Starlink, including its satellite access networks, gateway and point-of-presence structures, and backbone and Internet ...
Jianping Pan 0001, Jinwei Zhao, Lin Cai 0001   +2 more
openaire   +2 more sources

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

Fused Low-Earth-Orbit GNSS

IEEE Transactions on Aerospace and Electronic Systems
Traditional Global Navigation Satellite System (GNSS) immunity to interference may be approaching a practical performance ceiling. Greater gains are possible outside traditional GNSS orbits and spectrum. GNSS from low Earth orbit (LEO) has long been viewed as promising but expensive, requiring large constellations for rapid navigation solutions.
Peter Anthony Iannucci, Todd E. Humphreys   +1 more
openaire   +2 more sources

Precision Orbit Propagator for Low Earth Orbiters

The Journal of Korea Navigation Institute, 2012
Low Earth orbit satellites with satellite navigation receiver use onboard navigation filters for filtering measurement signals and for orbit prediction under signal loss. Precision satellite dynamic models, core of the navigation filter, are studied and a computation program is developed. Gravity acceleration, precision coordinate transform, third-body
Jeong-Rae Kim, Jeong-Ho Noh, Chang-Don Kee   +2 more
openaire   +2 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