Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jérôme Leclère"'
Autor:
Miguel Angel Ribot, Jean-Christophe Kucwaj, Cyril Botteron, Serge Reboul, Georges Stienne, Jérôme Leclère, Jean-Bernard Choquel, Pierre-André Farine, Mohammed Benjelloun
Publikováno v:
Sensors, Vol 14, Iss 6, Pp 10234-10257 (2014)
It is well known that reflected signals from Global Navigation Satellite Systems (GNSS) can be used for altimetry applications, such as monitoring of water levels and determining snow height. Due to the interference of these reflected signals and the
Externí odkaz:
https://doaj.org/article/14ac647f59a64ded9e42fc277ad27fcd
Autor:
Pierre-André Farine, Jan Skaloud, Steven V. Weijs, Jérôme Leclère, Nicholas Dawes, Cyril Botteron
Publikováno v:
Remote Sensing, Vol 5, Iss 7, Pp 3516-3543 (2013)
Moisture content in the soil and snow in the alpine environment is an important factor, not only for environmentally oriented research, but also for decision making in agriculture and hazard management. Current observation techniques quantifying soil
Externí odkaz:
https://doaj.org/article/f2131b8973a84395812db0923e290b45
Publikováno v:
Sensors, Vol 18, Iss 9, p 2779 (2018)
Nowadays, civil Global Navigation Satellite System (GNSS) signals are available in both L1 and L5 bands. A receiver does not need to acquire independently the signals in both bands coming from a same satellite, since their carrier Doppler and code de
Externí odkaz:
https://doaj.org/article/085b8e1a8a034c46a4b96364a84792f9
Autor:
Vincenzo Capuano, Paul Blunt, Cyril Botteron, Jia Tian, Jérôme Leclère, Yanguang Wang, Francesco Basile, Pierre-André Farine
Publikováno v:
Sensors, Vol 16, Iss 3, p 347 (2016)
Global Navigation Satellite Systems (GNSSs) were originally introduced to provide positioning and timing services for terrestrial Earth users. However, space users increasingly rely on GNSS for spacecraft navigation and other science applications at
Externí odkaz:
https://doaj.org/article/67379b94feb54aa59fd1afdb31eb2abe
Autor:
René Landry, Jérôme Leclère
Publikováno v:
Journal of Navigation. 72:555-574
The acquisition of modern Global Navigation Satellite System (GNSS) signals may be difficult due to the presence of a secondary code. Indeed, short coherent integration times should be used without non-coherent integration, which implies a low sensit
Publikováno v:
IEEE Aerospace and Electronic Systems Magazine. 32:46-63
The modern global navigation satellite systems (GNSS) signals, such as the Global Positioning System (GPS) L5 and L1C, and Galileo E5 and E1, have brought several innovations: the introduction of a pilot channel that does not contain any data to allo
Publikováno v:
International Journal of Navigation and Observation. 2015:1-12
With modern global navigation satellite system (GNSS) signals, the FFT-based parallel code search acquisition must handle the frequent sign transitions due to the data or the secondary code. There is a straightforward solution to this problem, which
Autor:
Pierre-André Farine, Cyril Botteron, Yanguang Wang, Jérôme Leclère, Jia Tian, Vincenzo Capuano
Publikováno v:
Acta Astronautica. 116:186-201
Reaching the Moon poses very strict requirements in terms of performance, flexibility and cost for all the spacecraft subsystems. These requirements become more stringent if the mission is designed to be accomplished using a small spacecraft. The nav
Autor:
René Landry, Jérôme Leclère
Publikováno v:
PLANS
The secondary codes of the modern GNSS signals bring some notable advantages, however they constitute a challenge for the acquisition process. Indeed, it becomes much more difficult to extend the coherent integration time with these codes. Several me
Publikováno v:
PLANS
Nowadays, the availability of the vehicle position gets more and more important. The use of the Global Positioning System (GPS) receiver has solved this problem. Nevertheless, this system could suffer from availability of the minimum number of visibl