Results 101 to 110 of about 14,978 (220)

Design of double band Beidou navigation antenna with wide axial ratio beam

open access: yesZhongguo Jianchuan Yanjiu
ObjectivesIn order to effectively broaden the beam width of the 3 dB axis ratio of a Beidou antenna, this paper proposes a slotted laminated microstrip patch antenna loaded with parasitic elements.
Zhuolin DENG   +3 more
doaj   +1 more source

Medium Earth Orbits: Is There a Need for a Third Protected Region? [PDF]

open access: yes
The Inter-Agency Space Debris Coordination Committee (IADC) and the United Nations have adopted the concept of near-Earth regions which should be afforded protection from the accumulation of orbital debris.
Johnson, Nicholas L.
core   +1 more source

Proposta de aplicativo para coleta de dados de mobilidade [PDF]

open access: yes, 2017
TCC (graduação) - Universidade Federal de Santa Catarina. Campus Joinville. Engenharia de Transportes e Logística.Entre os anos de 1940 e 2000, a população do Brasil quadruplicou, e para 2016 estima-se que tenha crescido mais de 20%, chegando aos 205 ...
Henning, Yan
core  

Orbital Debris Quarterly News [PDF]

open access: yes
No abstract ...
Anz-Meador, Phillip D.
core   +1 more source

Towards Quantum Communication from Global Navigation Satellite System

open access: yes, 2018
Satellite-based quantum communication is an invaluable resource for the realization of a quantum network at the global scale. In this regard, the use of satellites well beyond the low Earth orbits gives the advantage of long communication time with a ...
Agnesi, Costatino   +9 more
core   +1 more source

Geosynchronous SAR for Terrain & atmosphere with short revisit (GeoSTARe) [PDF]

open access: yes, 2016
Geo STA Re would be a mission combining the continuous view capabilities from geostationary orbits of super-continental areas with the all-day, all-weather imaging capabilities of Synthetic Aperture Radar.
Bombaci, Ornella   +7 more
core  

Satelliittipaikannusjärjestelmät ja niiden hyödyt yrityksille [PDF]

open access: yes, 2014
Eurooppa on kehittämässä uutta satelliittipaikannusjärjestelmää nimeltään Galileo. Tämän opinnäytetyön tavoitteena on analysoida paikannusjärjestelmät ja niiden tuomat mahdollisuudet.
Chung, Dat
core  

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