Further Test Results For Prototype Gps Rubidium Clocks
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Further Test Results For Prototype Gps Rubidium Clocks
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Author :
language : en
Publisher:
Release Date : 1985
Further Test Results For Prototype Gps Rubidium Clocks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
This paper presents the results of further stability and qualification-level environmental tests on two prototype rubidium frequency standards for the GPS navigation satellite program. One unit was subjected to a 140-day thermovac stability retest that confirmed the efficacy of two improvements that reduce frequency drift and frequency and light intensity fluctuations. The observed drift was -1.4 x 10( -14)/day and the stability was 6 x 10( -14) at 10(5) seconds. This was accomplished by using an absorption cell made from glass having low helium permeability and a lamp having a lower (normal) rubidium fill. The other unit was successfully subjected to qualification levels of thermal, mechanical and EMI retesting. Several electrical, high temperature, and mechanical problems associated with the ovenized crystal oscillator were corrected. Improved design and filtering of the control/monitor cable and power supply satisfactorily resolved several EMI problems.
The 22nd Annual Precise Time And Time Interval Ptti Applications And Planning Meeting
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Author :
language : en
Publisher:
Release Date : 1990
The 22nd Annual Precise Time And Time Interval Ptti Applications And Planning Meeting written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Igfs 2014
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Author : Shuanggen Jin
language : en
Publisher: Springer
Release Date : 2017-02-17
Igfs 2014 written by Shuanggen Jin and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-17 with Science categories.
This volume contains the proceedings of 24 peer-reviewed papers presented at the 3rd International Gravity Field Service (IGFS) General Assembly, which was organized by the International Gravity Field Service (IGFS), Commission 2 of the International Association of Geodesy (IAG), and Shanghai Astronomical Observatory (SHAO), Chinese Academy of Sciences. The Assembly was successfully held in Shanghai, China from June 30th to July 6th, 2014 with over 130 participants from 25 countries. The focus of the Assembly is on methods for observing, estimating and interpreting the Earth gravity field as well as its applications, including 6 sessions: gravimetry and gravity networks, global geopotential models and vertical datum unification, local geoid/gravity modelling, satellite gravimetry, mass movements in the Earth system and solid Earth investigations.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1987
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Aeronautics categories.
Nasa Conference Publication
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Author :
language : en
Publisher:
Release Date : 1991
Nasa Conference Publication written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Aeronautics categories.
Annual Precise Time And Time Interval Ptti Applications And Planning Meeting
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Author :
language : en
Publisher:
Release Date : 1991
Annual Precise Time And Time Interval Ptti Applications And Planning Meeting written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Time categories.
Position Navigation And Timing Technologies In The 21st Century Volumes 1 And 2
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Author : Y. Jade Morton
language : en
Publisher: John Wiley & Sons
Release Date : 2020-12-17
Position Navigation And Timing Technologies In The 21st Century Volumes 1 And 2 written by Y. Jade Morton and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-17 with Science categories.
Covers the latest developments in PNT technologies, including integrated satellite navigation, sensor systems, and civil applications Featuring sixty-four chapters that are divided into six parts, this two-volume work provides comprehensive coverage of the state-of-the-art in satellite-based position, navigation, and timing (PNT) technologies and civilian applications. It also examines alternative navigation technologies based on other signals-of-opportunity and sensors and offers a comprehensive treatment on integrated PNT systems for consumer and commercial applications. Volume 1 of Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications contains three parts and focuses on the satellite navigation systems, technologies, and engineering and scientific applications. It starts with a historical perspective of GPS development and other related PNT development. Current global and regional navigation satellite systems (GNSS and RNSS), their inter-operability, signal quality monitoring, satellite orbit and time synchronization, and ground- and satellite-based augmentation systems are examined. Recent progresses in satellite navigation receiver technologies and challenges for operations in multipath-rich urban environment, in handling spoofing and interference, and in ensuring PNT integrity are addressed. A section on satellite navigation for engineering and scientific applications finishes off the volume. Volume 2 of Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications consists of three parts and addresses PNT using alternative signals and sensors and integrated PNT technologies for consumer and commercial applications. It looks at PNT using various radio signals-of-opportunity, atomic clock, optical, laser, magnetic field, celestial, MEMS and inertial sensors, as well as the concept of navigation from Low-Earth Orbiting (LEO) satellites. GNSS-INS integration, neuroscience of navigation, and animal navigation are also covered. The volume finishes off with a collection of work on contemporary PNT applications such as survey and mobile mapping, precision agriculture, wearable systems, automated driving, train control, commercial unmanned aircraft systems, aviation, and navigation in the unique Arctic environment. In addition, this text: Serves as a complete reference and handbook for professionals and students interested in the broad range of PNT subjects Includes chapters that focus on the latest developments in GNSS and other navigation sensors, techniques, and applications Illustrates interconnecting relationships between various types of technologies in order to assure more protected, tough, and accurate PNT Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications will appeal to all industry professionals, researchers, and academics involved with the science, engineering, and applications of position, navigation, and timing technologies. pnt21book.com
Interim Results From The Characterization Testing Of The Engineering Development Edm Rubidium Clocks For Satellite Applications
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Author : Edward D. Powers
language : en
Publisher:
Release Date : 1991
Interim Results From The Characterization Testing Of The Engineering Development Edm Rubidium Clocks For Satellite Applications written by Edward D. Powers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Time categories.
Some interim results from the environmental testing program to evaluate the Engineering Design Model (EDM) of the EG and G Spaceborne Rubidium Clock are presented.
Nrl Gps Bibliography
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Author : Robert R. Whitlock
language : en
Publisher:
Release Date : 2009
Nrl Gps Bibliography written by Robert R. Whitlock and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Artificial satellites in navigation categories.
Applications Of Gps For Surveying And Other Positioning Needs In Departments Of Transportation
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Author : Robert J. Czerniak
language : en
Publisher: Transportation Research Board
Release Date : 1998
Applications Of Gps For Surveying And Other Positioning Needs In Departments Of Transportation written by Robert J. Czerniak and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Technology & Engineering categories.
This synthesis will be of interest to both administrative and technical personnel in departments of transportation (DOTs), especially in the areas of surveying, mapping, transportation planning, environmental impact assessment, design, construction control, maintenance, operations, vehicle location, and other functions that require accurate location data. This report will be useful for intermodal transportation analyses and for measurement and positioning data for inventories and geographic information systems (GIS). It can also be useful to suppliers and developers of Global Positioning System (GPS) equipment. This report of the Transportation Research Board presents a description of GPS, the major components, basic geodesy principles, how GPS functions, and how it can be applicable to the data and analysis requirements of transportation agencies. The anticipated cost effectiveness of GPS in terms of personnel, equipment, and time as related to the improved accuracies to be derived from GPS applications are described. Current and more advanced applications of GPS by DOTs to different transportation modes are presented. The report also includes a glossary of terms and a listing of GPS information sources.