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Low Thrust Manoeuvres to Perform Large Changes of RAAN Or Inclination in LEO
Facoltà di Ingegneria Corso di Laurea Magistrale in Ingegneria Aerospaziale Master Thesis Low Thrust Manoeuvres To Perform Large Changes of RAAN or Inclination in LEO Academic Tutor: Prof. Lorenzo CASALINO Candidate: Filippo GRISOT July 2018 “It is possible for ordinary people to choose to be extraordinary” E. Musk ii Filippo Grisot – Master Thesis iii Filippo Grisot – Master Thesis Acknowledgments I would like to address my sincere acknowledgments to my professor Lorenzo Casalino, for your huge help in these moths, for your willingness, for your professionalism and for your kindness. It was very stimulating, as well as fun, working with you. I would like to thank all my course-mates, for the time spent together inside and outside the “Poli”, for the help in passing the exams, for the fun and the desperation we shared throughout these years. I would like to especially express my gratitude to Emanuele, Gianluca, Giulia, Lorenzo and Fabio who, more than everyone, had to bear with me. I would like to also thank all my extra-Poli friends, especially Alberto, for your support and the long talks throughout these years, Zach, for being so close although the great distance between us, Bea’s family, for all the Sundays and summers spent together, and my soccer team Belfiga FC, for being the crazy lovable people you are. A huge acknowledgment needs to be address to my family: to my grandfather Luciano, for being a great friend; to my grandmother Bianca, for teaching me what “fighting” means; to my grandparents Beppe and Etta, for protecting me -
Observing from Space Orbits, Constraints, Planning, Coordination
Observing from Space Orbits, constraints, planning, coordination Integral XMM-Newton Jan-Uwe Ness European Space Astronomy Centre (ESAC) Villafranca del Castillo, Spain On behalf of the Integral and XMM-Newton Science Operations Centres Slide 1 Observing from Space - Orbits http://sci.esa.int/integral/59688-integral-fifteen-years-in-orbit/ Slide 2 Observing from Space - Orbits Highly elliptical Earth orbit: XMM-Newton, Integral, Chandra Slide 3 Observing from Space - Orbits Low-Earth orbit: ~1.5 hour, examples: Hubble Space Telescope Swift NuSTAR Fermi Earth blocking, especially low declination objects Only short snapshots of a few 100s possible No long uninterrupted observations Only partial overlap with Integral/XMM possible Slide 4 Observing from Space - Orbits Orbit around Lagrange point L2 past: future: Herschel James Webb Planck Athena present: Gaia Slide 5 Observing from Space – Constraints Motivations for constraints: • Safety of space-craft and instruments • Contamination by bright optical/X-ray sources or straylight from them • Functionality of star Tracker • Power supply (solar panels) • Thermal stability (avoid heat from the sun) • Ground contact for remote commanding and downlink of data Space-specific constraints in bold orange Slide 6 Observing from Space – Constraints Examples for constraints: • No observations while passing through radiation belts • Orientation of space craft to sun • Large avoidance angles around Sun and anti-Sun, Moon, Earth, Bright planets • No slewing over Moon and Earth (planets ok) • Availability -
(Nxpowerlite).Ppt
MAP/Ming Professorship, Engineering School, Stanford University, 29 March 2007 CEE 173L/273L: Advanced Energy End-Use Efficiency Public Lectures in Advanced Energy Efficiency: 4. Implementation “To be truly radical is to make hope possible, not despair convincing.” — Raymond Williams Amory B. Lovins Chairman and Chief Scientist Rocky Mountain Institute www .rmi.org [email protected] Copyright © 2007 Stanford University. All rights reserved. Distribution licensed to Rocky Mountain Institute. Osage (Iowa) municipal utilities ◊ 11 employees serving ~3,800 population ◊ A decade of demand-side management advice to homes and small businesses: Prepaid all the debt and built a $2.5M emergency fund Cut the rates 5 times in 5 y (by 1/3 real, to 1/2 IA av.) Kept existing factories competitive & attracted two more Kept >$1,000/household-y in town, supporting local jobs and multipliers Made Osage noticeably more prosperous than comparable neighboring towns ◊ If you can’t keep the bathtub full because the water keeps running out…do you need a bigger water-heater, or do you need a plug? U.S. energy/GDP already cut 46%, to very nearly the 1976 “soft path” 250 primary energy consumption (quadrillion BTU/year) 200 "hard path" projected by industry and government ~1975 government USEIA Annual 150 Energy Outlook actual total actual total energy saved 86 q/y = Reference Case, consumption 2004 and 2006 reported by USEIAconsumption 2.12× 2005 oil 100 "soft path" proposed by Lovins, Foreign Affairs , Fall 1976 coal gas oil and gas 50 soft technologies oil -
University of Cincinnati
UNIVERSITY OF CINCINNATI 05/29/08 Date:___________________ Carl Sterner I, _________________________________________________________, hereby submit this work as part of the requirements for the degree of: Master in: Architecture It is entitled: A Sustainable Pattern Language: A Comprehensive Approach to Sustainable Design This work and its defense approved by: Chair: T_om__ _Bible___________________________ Elizabeth______ _Riorden________________________ Michael_____ _Zaretsky_________________________ _______________________________ _______________________________ A Sustainable Pattern Language: A Comprehensive Approach to Sustainable Design Carl S. Sterner Bachelor of Architecture University of Cincinnati, 2006 Submitted in partial fulfillment of the requirements for the degree of Master of Architecture University of Cincinnati College of Design, Architecture, Art & Planning School of Architecture & Interior Design Committee Members: G. Thomas Bible Elizabeth Riorden Michael Zaretsky May 2008 Copyright © 2008 by Carl S. Sterner All rights reserved. Please direct reprint requests and questions to: Carl S. Sterner, [email protected] Abstract Sustainable design as presently prac- ticed focuses on technical solutions, ignoring the socio-cultural dimensions of sustainability. A truly sustainable society will require substantial change to our economic structure and social order. Architecture must therefore en- gage both the social and technical di- mensions of sustainability. This thesis attempts to understand the architectural implications -
NASA Process for Limiting Orbital Debris
NASA-HANDBOOK NASA HANDBOOK 8719.14 National Aeronautics and Space Administration Approved: 2008-07-30 Washington, DC 20546 Expiration Date: 2013-07-30 HANDBOOK FOR LIMITING ORBITAL DEBRIS Measurement System Identification: Metric APPROVED FOR PUBLIC RELEASE – DISTRIBUTION IS UNLIMITED NASA-Handbook 8719.14 This page intentionally left blank. Page 2 of 174 NASA-Handbook 8719.14 DOCUMENT HISTORY LOG Status Document Approval Date Description Revision Baseline 2008-07-30 Initial Release Page 3 of 174 NASA-Handbook 8719.14 This page intentionally left blank. Page 4 of 174 NASA-Handbook 8719.14 This page intentionally left blank. Page 6 of 174 NASA-Handbook 8719.14 TABLE OF CONTENTS 1 SCOPE...........................................................................................................................13 1.1 Purpose................................................................................................................................ 13 1.2 Applicability ....................................................................................................................... 13 2 APPLICABLE AND REFERENCE DOCUMENTS................................................14 3 ACRONYMS AND DEFINITIONS ...........................................................................15 3.1 Acronyms............................................................................................................................ 15 3.2 Definitions ......................................................................................................................... -
Lagrange Remote Sensing Instruments: the Extreme Ultraviolet Imager (Euvi)
LAGRANGE REMOTE SENSING INSTRUMENTS: THE EXTREME ULTRAVIOLET IMAGER (EUVI) C. Kintziger (CSL) - Presenter S. Habraken (CSL) P. Bouchez (CSL) Matthew West (ROB) David Berghmans (ROB) Manfred Gyo (PMOD/WRC) Margit Haberreiter (PMOD/WRC) Jackie Davies (RAL Space) Martin Caldwell (RAL Space) Ian Tosh (RAL Space) Stefan Kraft (ESA) 1 ESWW 2018, 9 Nov. 2018 LGRRS-EUVI | Mission overview 4 remote-sensing instruments See Poster 23 by J. Davies 2 ESWW 2018, 9 Nov. 2018 LGRRS-EUVI | Mission overview 5 in-situ instruments 3 ESWW 2018, 9 Nov. 2018 LGRRS-EUVI | Mission overview • Overall Remote Sensing Instruments leader: RAL Space (UK) • EUVI study led by three institutes: – CSL (BE) – ROB (BE) – PMOD/WRC (CH) • CSL activities • ROB activities • PMOD activities – EUVI Instrument manager: – instrument – electrical engineering • Overall management requirements – mechanisms • System study – instrument operation – mechanical engineering • Optical engineering – ground segments • Thermal engineering • AIT engineering • Roles & Responsibilities – BPI: Pr. Dr. Serge Habraken (CSL) – Bco-I: Dr. Matthew J West (ROB) – CSL work funded by Belspo via Prodex Programme 4 ESWW 2018, 9 Nov. 2018 LGRRS-EUVI | Mission overview • EUV Imager – SSA programme (SWE) – Location: L5 – Goal: image the full solar disc – Waveband: EUV wavelength (e.g. 193 Å) – Heritage: PROBA-2 SWAP ESIO (GSTP) Solar Orbiter EUI Parameter Requirement Spectral resolution < 1.5 푛푚 퐹푊퐻푀 Spatial resolution < 5 푎푟푐푠푒푐 Field of view 42.6′ 푥 42.6′ Mass < 8 푘푔 Size < 600 푥 150 푥 150 푚푚 Power < 10 푊 5 ESWW 2018, 9 Nov. 2018 LGRRS-EUVI | Instrument overview • Selected wavelengths 131 nm 19.5 nm 30.4 nm Semi-Static Structures Dynamic structures Regions Filaments/Prominences Flares Chromosphere Active Regions Eruptions Million Degree Corona Coronal Holes EUV Waves Dimmings 6 ESWW 2018, 9 Nov. -
INNER WORKINGS Inner Workings: Hubble’S Quarter Century in Orbit Has Opened a Universe of Possibilities David J
INNER WORKINGS Inner Workings: Hubble’s quarter century in orbit has opened a universe of possibilities David J. Harris Science Writer advocates, including astronomers John Bahcall and Lyman Spitzer, in 1974 obtained a letter from the National Research Council’s decadal survey of astronomy committee saying that When the Hubble Space Telescope was beyond the present orbiting astronomical ob- an updated 1970 survey would rank the proj- deployed from Space Shuttle Discovery on servatories program” (1). This new breed of ect higher. That gave them the leverage they April 25, 1990, few knew just how far-reach- telescope would have a much larger aperture needed to convince Congress. ing its impact would be on astronomy, cos- than existing orbiting astronomical observa- The initial proposed launch date was 1983. mology, and public appreciation of the tories and be capable of “stellar and nebular But technical delays, budget problems, and universe. “It has given us views of the uni- studies through the entire spectral range from the 1986 Space Shuttle Challenger disaster verse that we have never seen before and soft X rays to infrared.” However, the budgets pushed the launch to 1990. Then came a se- provided a wealth of data for astronomers and the technological capabilities of the ries of difficult servicing missions beginning around the world to ponder,” says Ken time presented challenges for a large-aper- in 1993 to install corrective optics for the in- Sembach, head of the Hubble Mission Office ture space telescope. correctly ground main mirror and upgrade at the Space Telescope Science Institute. Hub- Recommendations at the Academy’s1965 various components. -
Exploring the Solar Poles and the Heliosphere from High Helio-Latitude
A white paper submitted to ESA for the Voyage 2050 long- term plan ? A journey to the polar regions of a star: Exploring the solar poles and the heliosphere from high helio-latitude Louise Harra ([email protected]) and the solar polar team PMOC/WRC, Dorfstrasse 33, CH-7260 Davos Dorf & ETH-Zürich, Switzerland [Image: Polar regions of major Solar System bodies. Top left, clockwise - Near-surface zonal flows around the solar north pole Bogart et al. (2015); Earth’s changing magnetic field from ESA’s Swarm constellation; Southern polar cap of Mars from ESA’s ExoMars; Jupiter’s poles from the NASA Juno mission; Saturn’s poles from the NASA Cassini mission.] Overview We aim to embark on one of humankind’s great journeys – to travel over the poles of our star, with a spacecraft unprecedented in its technology and instrumentation – to explore the polar regions of the Sun and their effect on the inner heliosphere in which we live. The polar vantage point provides a unique opportunity for major scientific advances in the field of heliophysics, and thus also provides the scientific underpinning for space weather applications. It has long been a scientific goal to study the poles of the Sun, illustrated by the NASA/ESA International Solar Polar Mission that was proposed over four decades ago, which led to the flight of ESA’s Ulysses spacecraft (1990 to 2009). Indeed, with regard to the Earth, we took the first tentative steps to explore the Earth’s polar regions only in the 1800s. Today, with the aid of space missions, key measurements relating to the nature and evolution of Earth’s polar regions are being made, providing vital input to climate-change models. -
Cleaner Energy, Greener Profits
Cleaner Energy, Greener Profits: Fuel Cells as Cost-Effective Distributed Energy Resources Contents: Executive Summary . 2 By Joel N. Swisher, Ph.D., P.E. Introduction . 4 Rocky Mountain Institute Fuel cells: A small, clean,reliable This publication and its underlying research were funded power source . 6 by the grants from the W. Alton Jones Foundation, What is different Pew Charitable Trusts, and Energy Foundation. about today’s electricity problems? The author, a civil and mechanical engineer with a . 8 Stanford doctorate in civil and environmental engineering, is an authority on distributed generation Changing Trends in and leads RMI’s Energy and Resource Services team. the Electricity Industry . 9 Small is profitable: the economic benefits of distributed generation . 13 Early markets and commercialization paths . 32 Cleaner Energy, Greener Profits Executive Summary The electric power industry is undergoing centrally focused “generation-transmission- major changes that are reshaping the traditional distribution” companies into a more heteroge- roles of utilities, creating opportunities for new neous structure. The new industry will be made technologies, and redefining the scope and up of companies fulfilling various traditional character of government regulation. These roles, including independent power producers, changes are arising out of the interaction of electric service providers, energy brokers and several driving forces: marketers, transmission operators, and local distribution companies. • An emerging technological shift could offer distributed generation sources economic One of the most promising and exciting distrib- benefits unavailable to traditional, central- uted generation (DG) options is fuel cell ized sources of electricity. technology, which converts fuel to electricity at • Regulatory and public policy support is high efficiency, without combustion, and with growing for competition over traditional negligible emissions. -
ASTRONOMY 18 Th-Century Math Sets Stage for Future Space Exploration Columbus Dispatch Tuesday, October 05, 2004 TOM BURNS
ASTRONOMY 18 th-century math sets stage for future space exploration Columbus Dispatch Tuesday, October 05, 2004 TOM BURNS In the mid-18 th century, mathematicians and scientists such as J.L. Lagrange were obsessed with the three-body problem - mathematical rules behind the mutual attraction of three large bodies, such as two planets orbiting the sun or a moon orbiting a planet orbiting the sun. Almost 250 years later, Lagrange's elegant solution has implications that will determine the course of space exploration over the coming decades. It works like this: If one object orbits another, there are five places near the orbiting object where another object can lock into a stable and permanent orbit. Think of them as naturalgravity wells. To put a space station in a stable orbit near Earth, the No. 4 and No. 5 sun-Earth natural-gravity wells - known as Lagrange points - can't be beat. They are located along Earth's orbit 60 degrees on either side of Earth. One precedes Earth and the other trails it. Unfortunately, they are each 50 million miles from our planet, a bit distant for things such as supply shipments, rescues and maintenance missions. Much better is Lagrange point No. 3, about 1 million miles toward the sun. At that location, your space telescope is locked as a minor planet orbiting the sun. But because of its sunny location, Lagrange point No. 3 is not a great place to observe stars. However, the No. 3 Solar and Heliospheric Observatory, or SoHo, has for years produced beautiful images of our home star. -
Mathematics for Physics I
Mathematics for Physics I A set of lecture notes by Michael Stone PIMANDER-CASAUBON Alexandria Florence London • • ii Copyright c 2001,2002 M. Stone. All rights reserved. No part of this material can be reproduced, stored or transmitted without the written permission of the author. For information contact: Michael Stone, Loomis Laboratory of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USA. Preface These notes were prepared for the first semester of a year-long mathematical methods course for begining graduate students in physics. The emphasis is on linear operators and stresses the analogy between such operators acting on function spaces and matrices acting on finite dimensional spaces. The op- erator language then provides a unified framework for investigating ordinary and partial differential equations, and integral equations. The mathematical prerequisites for the course are a sound grasp of un- dergraduate calculus (including the vector calculus needed for electricity and magnetism courses), linear algebra (the more the better), and competence at complex arithmetic. Fourier sums and integrals, as well as basic ordinary differential equation theory receive a quick review, but it would help if the reader had some prior experience to build on. Contour integration is not required. iii iv PREFACE Contents Preface iii 1 Calculus of Variations 1 1.1 What is it good for? . 1 1.2 Functionals . 2 1.2.1 The functional derivative . 2 1.2.2 The Euler-Lagrange equation . 3 1.2.3 Some applications . 4 1.2.4 First integral . 8 1.3 Lagrangian Mechanics . 9 1.3.1 One degree of freedom . -
NATURAL CAPITALISM by Christopher Juniper
Rocky Mountain Institute/volume xvii #1/spring 2001 RMISolutions newsletter F ROZEN ASSETS? ALASKAN OIL’S THREAT TO NATIONAL NERGY ECURITY E S by Amory B. Lovins and L. Hunter Lovins “We must continue, I believe, to safeguard the Arctic National Wildlife Refuge, one of the last truly wild places on Earth—the Serengeti of the Americas.” —PRESIDENT CLINTON, JANUARY 17, 2001 The Arctic National Wildlife Refuge. photo: Galen Rowell S YOU READ THIS ISSUE OF RMI improve but compromise national energy Solutions, Congress is debating security and economic vitality, especially CONTENTS whether the oil potential when compared with alternatives that ben- A HYPERCAR MAKES ITS MOVE ... page 4 beneath the Arctic National Wildlife Refuge efit both and improve the environment. (ANWR) in Alaska is worth the environ- THE NATCAP CONSUMER ..... page 6 mental damage caused by extracting and FOLLOW THE MONEY burning it. Largely unexamined so far are First, the economics of drilling for Refuge A LETTER FROM OZ ....... page 8 more basic questions: Is it profitable? Is it oil look as unrewarding as its politics. For GDS IN EUROPE ........ page 10 necessary? Is drilling a good idea? Is there a the oil industry to invest, the Refuge must better way? hold a lot of oil, and the oil must sell for a BILL BROWNING,HONORARY AIA . page 11 The rationale for drilling in the Refuge is to high enough price for long enough to DEAR ROCKY .......... page 12 find a domestic oil supply, income for recover costs and earn profits. When JOHN TODD—WATER DOCTOR .. page 14 Alaska, and profit for private firms.