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Rubidium Atomic Clock for Galileo

Rubidium Atomic Clock for Galileo
Author:
Publisher:
Total Pages: 11
Release: 1999
Genre:
ISBN:

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The overall performance of navigation payloads is dependent on the performance of the on-board clocks. Better stability leads directly to improved space segment autonomy and simplified ground segment operation. The European Space Agency supports the development of advanced atomic clocks in the frame of its Technology Demonstration Program and more recently under the GNSS-2 program. Two major activities are currently running with the aim fully space-qualifying a Rubidium Atomic Frequency Standard (RAFS) and a Space Hydrogen Maser (SHM). The development activity for the Rubidium clocks is driven by the following major design goals: * Mass


Rubidium Atomic Clock: The Workhorse Of Satellite Navigation

Rubidium Atomic Clock: The Workhorse Of Satellite Navigation
Author: G M Saxena
Publisher: World Scientific
Total Pages: 317
Release: 2020-03-05
Genre: Science
ISBN: 9813279508

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The Rubidium atomic clock (Rb) is the workhorse of the satellite navigation systems of which GPS is now a household name. With just the tap of a few keys, drivers and navigators all over the world are able to reach their destination effortlessly with high precision. People are now curious to know what makes this possible. Hence, the need to explain in simplistic terms the Rb atomic clocks that are onboard these satellite navigation systems because no good satellite navigation system is possible without such clocks.But why only Rb atomic clocks when far better and exotic atomic clocks are available? The reasons are as simple as that they are slim, low in weight, easy to build inexpensively. They are also used in numerous military applications such as secure communications, electronic warfare, command and control, telemetry and navigation. Besides, they are used in the measurements of the variation in fine-structure constant, test of relativity, precise spectroscopy and scientific research.This book details the history of time keeping and the chronological development of the Rb atomic clocks, with special focus on the physics Package that accounts for the actual performance of the clock. Researchers and industrialists will find that producing such clocks is relatively simple and inexpensive.


Rubidium Atomic Clock

Rubidium Atomic Clock
Author: BIKASH. SAXENA GHOSAL (G M.)
Publisher:
Total Pages: 317
Release: 2019
Genre: Artificial satellites in navigation
ISBN: 9789813279490

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A Space Rubidium Pulsed Optical Pumped Clock - Current Status, Results, and Future Activities

A Space Rubidium Pulsed Optical Pumped Clock - Current Status, Results, and Future Activities
Author:
Publisher:
Total Pages: 13
Release: 2009
Genre:
ISBN:

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Since the year 2000, Selex Galileo activity on Space Frequency Standards has been pursuing the development of a Passive Hydrogen Maser (PHM), presently the primary clock of the Galileo Navigation Constellation. A consortium has been established in 2007 with one of the best scientific laboratories in the European Time-Frequency community: the Istituto Nazionale di Ricerca Metrologica - INRiM (I) in order to demonstrate that the POP technique is suitable for space applications. The name of the project, Maser POP, comes from a very promising technique studied and refined by INRiM in order to achieve performance close to that of a passive hydrogen maser, but with dimensions and power consumption closer to a rubidium clock. Under an Italian Space Agency ASI contract, a feasibility study has been completed in 2008 concerning the manufacture of a clock breadboard and the preliminary design of the three units composing the clock: Space Physics Unit, Optical Unit, and Electronic Unit. This paper summarizes the outcome of this study in terms of Breadboard (BB) results (where a frequency stability on the order of 1.2x10( -12)tau( -0.5) has been measured) and the critical areas that shall be correctly addressed for the project objective's full achievement. The development plan of the Maser POP is presented together with an overview of expected characteristics, in terms of mass and power consumption, realistically optimized taking into account the needs of the space market. A preliminary schedule is also presented concerning future activities aiming at the development of an Engineering Model (EM). This plan includes the qualification of the clock against the Galileo environmental requirements. Also, these further activities will be supported by the Italian Space Agency (ASI) in the frame of the Space Atomic Clock Development program.


Satellite Communications and Navigation Systems

Satellite Communications and Navigation Systems
Author: Enrico Re
Publisher: Springer Science & Business Media
Total Pages: 752
Release: 2007-12-19
Genre: Technology & Engineering
ISBN: 0387475249

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Satellite Communications and Navigation Systems publishes the proceedings of the 2006 Tyrrhenian International Workshop on Digital Communications. The book focuses on the integration of communication and navigation systems in satellites.


From Sundials to Atomic Clocks

From Sundials to Atomic Clocks
Author: James Jespersen
Publisher: Courier Corporation
Total Pages: 322
Release: 1999-01-01
Genre: Science
ISBN: 0486409139

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Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science and technology, and much more. Over 300 illustrations.


Geometrical Theory of Satellite Orbits and Gravity Field

Geometrical Theory of Satellite Orbits and Gravity Field
Author: Drazen Svehla
Publisher: Springer
Total Pages: 542
Release: 2018-07-02
Genre: Science
ISBN: 3319768735

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This book on space geodesy presents pioneering geometrical approaches in the modelling of satellite orbits and gravity field of the Earth, based on the gravity field missions CHAMP, GRACE and GOCE in the LEO orbit. Geometrical approach is also extended to precise positioning in space using multi-GNSS constellations and space geodesy techniques in the realization of the terrestrial and celestial reference frame of the Earth. This book addresses major new developments that were taking place in space geodesy in the last decade, namely the availability of GPS receivers onboard LEO satellites, the multitude of the new GNSS satellite navigation systems, the huge improvement in the accuracy of satellite clocks and the revolution in the determination of the Earth's gravity field with dedicated satellite missions.


Position, Navigation, and Timing Technologies in the 21st Century, Volumes 1 and 2

Position, Navigation, and Timing Technologies in the 21st Century, Volumes 1 and 2
Author: Y. Jade Morton
Publisher: John Wiley & Sons
Total Pages: 2064
Release: 2020-12-17
Genre: Science
ISBN: 1119458420

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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