Filters








123 Hits in 2.7 sec

Page 3 of Information Services Vol. 45, Issue 6 [page]

1966 Information Services  
it should be recognized that we are on the threshold of a communcations and information revolution as a result of the development of the computer.  ...  Also in this middle zone are those routine, automatic, data-processing activities which previde men with the bases for controlling, or at least understanding, what is happening to a particular environment  ... 

Ground-Control System for Satcom Satellites

J. Lewin
1979 Journal of Spacecraft and Rockets  
The ultimate way of testing a satellite tracking system, however, is with a satellite in orbit.  ...  Antennas A ground antenna is dedicated to each satellite in orbit. Each antenna performs two functions during commercial operations: communications, and command and control.  ... 
doi:10.2514/3.57656 fatcat:7i3tc7wmqbbuthyi4w5c6vmbqu

Satellite Aided Coastal Zone Monitoring and Vessel Traffic System

J. L. BAKER
1980 Navigation  
interrogate ships, retransmit, and display LORAN-C position at a "control center" via satellite relay of communications.  ...  A manually-controlled commercial TV antenna-rotor drive was used to point the VHF antennas in azimuth toward the satellite as the ship changed course.  ... 
doi:10.1002/j.2161-4296.1980.tb01431.x fatcat:xtbxoxh3yrdcvoonui6gvl5l3y

NB-IoT over GEO Satellite: Performance Analysis

Romain Barbau, Vincent Deslandes, Gentian Jakllari, Jerome Tronc, Jean-Frederic Chouteau, Andre-Luc Beylot
2020 2020 10th Advanced Satellite Multimedia Systems Conference and the 16th Signal Processing for Space Communications Workshop (ASMS/SPSC)  
In this paper, we consider the necessary mechanisms for adapting NB-IoT to the satellite context and provide a study of the delay of a communication as function of gNodeB parameters, cell specification  ...  (size, link budget, satellite altitude) and payload size.  ...  Data Phase Since in this work we consider uplink traffic only (from UE to satellite), two kinds of messages are needed during the data phase: a) Resource Grants in the Narrowband Downlink Control CHannel  ... 
doi:10.1109/asms/spsc48805.2020.9268829 fatcat:3wm2ebrjbfcmzizoel5qlrqdba

System Issues Related to Satellite Communications in a Nuclear Environment

Per A. Kullstam
1987 MILCOM 1987 - IEEE Military Communications Conference - Crisis Communications: The Promise and Reality  
This case Is almfost possible for a terminal located due north or south of a geosynchronous satellite.  ...  ; a satellite network with a certain minimum size of earth terminals can be ensured a significantly larger coherent bandwidth than that which the scintillation medium itself defines to a very small (oani  ...  Radio HMv Prgggtilon in Stru~ctured lonization for Satellite Naolications 11, Report DHA-IR-82-02, 1 August 1982, Defense N~uclear Agency, Washington D.C. 20305. 2. Kullstam, Per A.  ... 
doi:10.1109/milcom.1987.4795216 fatcat:2obbifu4wfepxgqh22cltj2zdy

Remote operation of telescopes

Michael Penston
1982 Nature  
One solution to the present problem was to separate the difficulties of communication and control, defining interfaces between these segments only.  ...  Advantages in flexibility might also be provided -the difficulties of scheduling simultaneous observations on different telescope and/ or satellites might, for example, be eased.  ... 
doi:10.1038/298603a0 fatcat:4sdmvu4mpbcp5asuimlcfdmcxi

Decentralized Diagnosis with Isolation on Request for Spacecraft*

S. Indra, L. Travé-Massuyès, E. Chanthery
2012 IFAC Proceedings Volumes  
We develop diagnostic models of a satellite attitude determination and control system, and then design a decentralized diagnoser based on these models.  ...  This paper presents a decentralized diagnoser architecture for fault detection and isolation of continuous systems with a focus on space applications.  ...  mode when the satellite is controlled with reaction wheels.  ... 
doi:10.3182/20120829-3-mx-2028.00221 fatcat:r2pqfbuptfherjiqtg6opxkz2m

Delivering real-world ubiquitous location systems

Gaetano Borriello, Matthew Chalmers, Anthony LaMarca, Paddy Nixon
2005 Communications of the ACM  
Communcations of the ACM.  ...  The architecture shared by Place Lab and GPS gives users a degree of control over when and how their locations are revealed.  ...  Place Lab is a research project that attempts to GPS is truly ubiquitous, covering the entire Earth's surface by using a constellation of low-orbit satellites.  ... 
doi:10.1145/1047671.1047701 fatcat:ka6co6zf2bbkhcrippqrcoghqy

A Component-Based C++ Communication Middleware for an Autonomous Robotic Sailboat [chapter]

Francisco J. Santana-Jorge, Antonio C. Domínguez-Brito, Jorge Cabrera-Gámez
2018 Robotic Sailing 2017  
Acknowledgements The authors are sincerely grateful to Solumatica Canarias for providing financial support for building the A-TIRMA G2 prototype, and to the Real Club Náutico de Gran Canaria and to the  ...  The communcation controller acts as a gateway for sending and receiving, telemetry and remote telecommands.  ...  It uses a 3G/GPRS module 1 for data communications via the mobile phone network, and a Rockblock 9602 transceiver 2 for satellite communications utilizing 1 Waspmote GPRS + GPS Module (https://www.cooking-hacks.com  ... 
doi:10.1007/978-3-319-72739-4_4 fatcat:4jfjhhy3efh7zkmk5bnpk3a53u

A GREAT LAND MARK TO ACHIEVE 4-G MOBILE COMMUNICATIONS

Pijush Kanti Bhattacharjee .
2013 International Journal of Research in Engineering and Technology  
Celluar mobile communications have brought forth a massive change in telecommunications field due to introducing digital electronics switching and optical fibre as well as microwave and satellite links  ...  Are avilable for all at any time anywhere with a minimum price.  ...  It controls all the functions of a Mobile Network.  ... 
doi:10.15623/ijret.2013.0214001 fatcat:7rwd2o3obvaubkj5pudgwrflsm

Subject Index

2007 Journal of Spacecraft and Rockets  
Tolson Very-Small-Satellite Design for Distributed Space Missions D. J. Barnhart, T. Viadimirova, M. N.  ...  MEMBER INSTITUTION Journal of Guidance, Control, and Dynamics ; Subscribe online aC | Journal of Propulsion and Power .  ... 
doi:10.2514/1.35392 fatcat:7xrqac5dejev7nslbqni4zkzoi

Introduction to Satellite Communications [chapter]

Joseph N. Pelton
2011 Satellite Communications  
Hence, a 'atel te ne i rw,, Iturn to the latitude at which it was iljr;tcd. 221 2-13. SATELLITE CONTROL. The two main aspects of satellite control are crientation control and position control.  ...  (a) A typical satellite communications ground station has display and control subsystems as a part of the operations control center.  ...  Servo and Tracking Area. (1) Control and calibration checks are used to visually check all control functions to assure smooth operation.  ... 
doi:10.1007/978-1-4614-1994-5_1 fatcat:kkyj7uxunzhajleklqslj46lbm

Introduction to Satellite Communications [chapter]

2009 Satellite Systems Engineering in an IPv6 Environment  
Hence, a 'atel te ne i rw,, Iturn to the latitude at which it was iljr;tcd. 221 2-13. SATELLITE CONTROL. The two main aspects of satellite control are crientation control and position control.  ...  (a) A typical satellite communications ground station has display and control subsystems as a part of the operations control center.  ...  Servo and Tracking Area. (1) Control and calibration checks are used to visually check all control functions to assure smooth operation.  ... 
doi:10.1201/9781420078695.ch1 fatcat:pi6avqf3bvfpbbjfh3ydt56leq

Introduction to Satellite Communications [chapter]

Michael Miller
1993 Satellite Communications  
Hence, a 'atel te ne i rw,, Iturn to the latitude at which it was iljr;tcd. 221 2-13. SATELLITE CONTROL. The two main aspects of satellite control are crientation control and position control.  ...  (a) A typical satellite communications ground station has display and control subsystems as a part of the operations control center.  ...  Servo and Tracking Area. (1) Control and calibration checks are used to visually check all control functions to assure smooth operation.  ... 
doi:10.1007/978-1-4615-3230-9_1 fatcat:udscybpazfc6tl3wy3ipfqpk44

Adaptive rate coding using convolutional codes for asynchronous code division multiple access communications over slowly fading channels

Vidhyacharan Bhaskar, Laurie L. Joiner
2005 Computers & electrical engineering  
, 3) Thrust Vector Control system stability analysis and simulation for Transfer Orbit Stage vehicle used for Advanced Communication & Telemetry Satellite and Mars Observer payloads 4) Modeling of Space  ...  Shuttle Main Engine, simulation and failure detection, 5) Extended Kalman Filter development for Guidance, Navigation and Control of the Tethered Satellite System and X-33 single stage to orbit vehicle  ...  ADTRAN Communications Lab ADTRAN Corporation donated communications equipment for the ADTRAN Communcations Lab in the  ... 
doi:10.1016/j.compeleceng.2005.02.001 fatcat:jbr6pg5ta5a2tli4ullnmvjofy
« Previous Showing results 1 — 15 out of 123 results