Documents  satellite de télécommunication | enregistrements trouvés : 8

O
     

-A +A

Sélection courante (0) : Tout sélectionner / Tout déselectionner

P Q

Wärtsilä successfully tests remote controlled vessel
HAND, Marcus
04/09/2017
Seatrade Maritime news

Multimédia

V

... Lire [+]

Complément : "The test ­ which involved driving a vessel through a sequence of manoeuvres using a combination of dynamic positioning (DP) and manual joystick control ­ was carried out in August off the North Sea coast of Scotland in collaboration with Gulfmark Offshore, the U.S. based operator which provided the vessel for the project. The test was carried out using standard bandwidth onboard satellite communication.
No land-based technology was used for communication between the vessel and remote operator work station".
(The Marine professional {en ligne], 01-09-17, Dennis O'Neill)
Complément : "The test ­ which involved driving a vessel through a sequence of manoeuvres using a combination of dynamic positioning (DP) and manual joystick control ­ was carried out in August off the North Sea coast of Scotland in collaboration with Gulfmark Offshore, the U.S. based operator which provided the vessel for the project. The test was carried out using standard bandwidth onboard satellite communication.
No land-based technology was ...

navire autonome ; monitoring à distance ; satellite de télécommunication ; recherche développement

V

... Lire [+]

- n° vol.64,n°253 - p.19-36

Les horloges Rubidium et Hydrogène Maser des satellites Galileo sont cruciales pour obtenir un positionnement. Les pannes rencontrées ont fait l'objet d'un diagnostic pour une prise de décision de lancement de nouveaux satellites.

GNSS ; système de positionnement ; horloge ; satellite de télécommunication

V

... Lire [+]

- n° vol.70, n°4 - p. 686-698

Code Differential Global Positioning System (DGPS) is widely used in satellite navigation and positioning because of its simple algorithm and preferable precision. Multi-Global Navigation Satellite System (GNSS) is expected to enhance the accuracy, reliability and availability of Differential GNSS (DGNSS) positioning. Traditional DGNSS models should set separate clock parameters due to the clock differences between the different systems. Awareness of the Inter-System Bias (ISB) could help to maximise the redundancy of the positioning model, thus improving the performance of multi-GNSS positioning. This paper aims to examine the inter-system bias of GPS/GLONASS/BeiDou (BDS)/Galileo and their benefits in DGNSS positioning. Results show that Differential ISB (DISB) characteristics vary with different receiver types and systems. The size of DISB could reach metre-level and the precision of estimated DISBs can reach approximately several centimetres within tens of epochs. Therefore, a new real-time DGNSS model that accounts for ISB is proposed. After differential ISBs are initialised, positioning with four satellites from arbitrarily the same or different systems can be realised. Moreover, compared with the traditional DGNSS model, the precision of the positioning results with the new model are obviously improved, especially in harsh environments.
Code Differential Global Positioning System (DGPS) is widely used in satellite navigation and positioning because of its simple algorithm and preferable precision. Multi-Global Navigation Satellite System (GNSS) is expected to enhance the accuracy, reliability and availability of Differential GNSS (DGNSS) positioning. Traditional DGNSS models should set separate clock parameters due to the clock differences between the different systems. ...

GNSS ; satellite de télécommunication ; système de positionnement ; GPS ; navigation par satellite

V

... Lire [+]

- n° vol. 70, n°3 - p. 465-482

In view that most Global Navigation Satellite System (GNSS) users are still using single-frequency receivers due to the low costs, single-frequency Precise Point Positioning (PPP) has been attracting increasing attention in the GNSS community. For a long period, single-frequency PPP technology has mainly relied on the Global Positioning System (GPS). With the recent revitalisation of the Russian GLONASS constellation and two newly emerging constellations, BeiDou and Galileo, it is now feasible to investigate the performance of Four-Constellation integrated Single-Frequency PPP (FCSF-PPP) with GPS, GLONASS, BeiDou and Galileo measurements. In this study, a FCSF-PPP model is presented to simultaneously process observations from all four GNSS constellations. Datasets collected at 47 globally distributed four-system Multi-GNSS Experiment (MGEX) stations on seven consecutive days and a kinematic experimental dataset are employed to fully assess the performance of FCSF-PPP. The FCSF-PPP solutions are compared to GPS-only and combined GPS/GLONASS single-frequency PPP solutions. The results indicate that the positioning performance is significantly improved by integrating multi-constellation signals.
In view that most Global Navigation Satellite System (GNSS) users are still using single-frequency receivers due to the low costs, single-frequency Precise Point Positioning (PPP) has been attracting increasing attention in the GNSS community. For a long period, single-frequency PPP technology has mainly relied on the Global Positioning System (GPS). With the recent revitalisation of the Russian GLONASS constellation and two newly emerging ...

système de positionnement ; satellite de télécommunication ; GPS ; GNSS ; navigation par satellite

Connectivity reaches a tipping point

December 2016/January 2017
Marine Propulsion and Auxiliary Machinery

Article

V

... Lire [+]

- n° vol.38, issue 6 - p. 64-65,67

"A number of key advances in marine communications were made in 2016 that will facilitate digital adoption in the shipping market."

communication ; satellite de télécommunication ; échange de données informatisé (EDI) ; capteur ; cybersécurité ; transformation numérique ; drone maritime aérien

Quantum of the Seas leaps forward
PARKER, Susan
1st Quarter 2015
Passenger ship technology

Article

V

... Lire [+]

- n° vol.8, n°1 - p.20-24

Once again Royal Caribbean delivers on innovative design and technology, from groundbreaking entertainment venues to satellite communications that provide the fastest internet at sea.

navire de croisière ; gigantisme ; innovation technologique ; satellite de télécommunication ; design naval ; divertissement ; Internet

Innovations deliver faster onboard broadband for passengers
WINGROVE, Martyn
1st Quarter 2016
Passenger ship technology

Article

Z