Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Hugh G. Lewis"'
Publikováno v:
Sensors, Vol 24, Iss 18, p 6019 (2024)
Peatlands across the world are vital carbon stores. However, human activities have caused the degradation of many sites, increasing their greenhouse gas emissions and vulnerability to wildfires. Comprehensive monitoring of peatlands is essential for
Externí odkaz:
https://doaj.org/article/803002049cce4586be99c647b801e593
Publikováno v:
Sensors, Vol 24, Iss 4, p 1066 (2024)
In order to combat greenhouse gas emissions, the sources of these emissions must be understood. Environmental monitoring using low-cost wireless devices is one method of measuring emissions in crucial but remote settings, such as peatlands. The Figar
Externí odkaz:
https://doaj.org/article/604d5ae45e604bf2b5615b45ecfe832b
Publikováno v:
Advances in Space Research. 69:1578-1587
The objective of this paper is to identify the illumination conditions that maximise the differences that can be measured between light curves of an object resulting from its attitude state. This is relevant to attitude determination techniques using
Autor:
Stijn Lemmens, Liu Jing, Darren S. McKnight, Rachel Witner, Chris Kunstadter, Francesca Letizia, Alessandro Rossi, Wang Dongfang, Hugh G. Lewis, D. A. Grishko, Mike Nicolls, Satomi Kawamoto, Shen Dan, Juan-Carlos Dolado Perez, Luciano Anselmo, Vincent Ruch, Vladimir S. Aslanov, Carmen Pardini, A. A. Baranov
Publikováno v:
Acta astronautica 181 (2021): 282–291. doi:10.1016/j.actaastro.2021.01.021
info:cnr-pdr/source/autori:McKnight D., Witner R.; Letizia F.; Lemmens S.; Anselmo L.; Pardini C.; Rossi A.; Kunstadter C.; Kawamoto S.; Aslanov V.; Dolado Perez J.-C.; Ruch V.; Lewis H.; Nicolls M.; Jing L.; Dan S.; Dongfang W.; Baranov A.; Grishko D./titolo:Identifying the 50 statistically-most-concerning derelict objects in LEO/doi:10.1016%2Fj.actaastro.2021.01.021/rivista:Acta astronautica/anno:2021/pagina_da:282/pagina_a:291/intervallo_pagine:282–291/volume:181
info:cnr-pdr/source/autori:McKnight D., Witner R.; Letizia F.; Lemmens S.; Anselmo L.; Pardini C.; Rossi A.; Kunstadter C.; Kawamoto S.; Aslanov V.; Dolado Perez J.-C.; Ruch V.; Lewis H.; Nicolls M.; Jing L.; Dan S.; Dongfang W.; Baranov A.; Grishko D./titolo:Identifying the 50 statistically-most-concerning derelict objects in LEO/doi:10.1016%2Fj.actaastro.2021.01.021/rivista:Acta astronautica/anno:2021/pagina_da:282/pagina_a:291/intervallo_pagine:282–291/volume:181
著者人数: 19名
形態: カラー図版あり
Number of authors: 19
Physical characteristics: Original contains color illustrations
Accepted: 2021-01-14
資料番号: PA2110015000
形態: カラー図版あり
Number of authors: 19
Physical characteristics: Original contains color illustrations
Accepted: 2021-01-14
資料番号: PA2110015000
Autor:
Hugh G. Lewis
Publikováno v:
Journal of Space Safety Engineering. 7:192-197
Large constellations of satellites in Low Earth Orbit (LEO) may adversely impact the sustainable use of the space environment over the long-term unless appropriate plans for orbital debris mitigation measures are incorporated into the design and oper
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 12:4426-4437
A new Hopfield neural network (HNN) model for downscaling a digital elevation model in grid form (gridded DEM) is proposed. The HNN downscaling model works by minimizing the local semivariance as a goal, and by matching the original coarse spatial re
Future decreases in thermospheric neutral density in low Earth orbit due to carbon dioxide emissions
Increasing carbon dioxide causes cooling in the upper atmosphere and a secular decrease in atmospheric density over time. With the use of the Whole Atmospheric Community Climate Model with thermosphere and ionosphere extension (WACCM‐X), neutral th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84e5f69c8b9d8d48dfc0246e08e7aafd
Wiley Online Library
Wiley Online Library
Increasing carbon dioxide causes cooling in the upper atmosphere and a secular decrease in atmospheric density over time. With the use of the Whole Atmospheric Community Climate Model with thermosp...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2b3133c5a131528dd049308a86f02ec
https://doi.org/10.1002/essoar.10505899.1
https://doi.org/10.1002/essoar.10505899.1
Publikováno v:
Journal of Space Safety Engineering
In the past few years, the interest towards the implementation of design-for-demise measures has increased steadily. Most mid-sized satellites currently launched and already in orbit fail to comply with the casualty risk threshold of 0.0001. Therefor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba2c928fdb4203a1d1523d8d8bd82923
http://arxiv.org/abs/2101.01558
http://arxiv.org/abs/2101.01558
Until two decades ago, the dominance of the space industry by national governments shaped the key characteristics of the spacecraft population and hence the space debris models used to anticipate future orbital populations. The rise of `NewSpace’ w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b71235cec7f4f888bbbe84b7b3386ba
https://eprints.soton.ac.uk/443465/
https://eprints.soton.ac.uk/443465/