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Rfi Issue and Spectrum Sharing Paradigm for Future Satellite
RFI ISSUE AND SPECTRUM SHARING PARADIGM FOR FUTURE SATELLITE COMMUNICATION AND RADIO ASTRONOMY SYSTEMS by Yucheng Dai APPROVED BY SUPERVISORY COMMITTEE: Dr. Hlaing Minn, Chair Dr. John P. Fonseka Dr. Andrea Fumagalli Dr. Murat Torlak Copyright © 2020 Yucheng Dai All rights reserved Dedicated to my family, I received no more powerful and effective support than the support from my beloved family. RFI ISSUE AND SPECTRUM SHARING PARADIGM FOR FUTURE SATELLITE COMMUNICATION AND RADIO ASTRONOMY SYSTEMS by YUCHENG DAI, BS, MS DISSERTATION Presented to the Faculty of The University of Texas at Dallas in Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY IN ELECTRICAL ENGINEERING THE UNIVERSITY OF TEXAS AT DALLAS August 2020 ACKNOWLEDGMENTS I would like to thank my PhD adviser, Dr. Hlaing Minn, for his valuable advice, dedicated guidance, and unparalleled support that made this work possible. I would like to express my deepest appreciation to my committee members, Drs. Andrea Fumagalli, John P. Fonseka, and Murat Torlak. I would like to thank my parents, for their guidance to the way to PhD, and for their support both spiritually and financially. I also want to thank my friend and lab-mate, Dong Han, who shows an example of dedicated and helpful PhD student to me. June 2020 v RFI ISSUE AND SPECTRUM SHARING PARADIGM FOR FUTURE SATELLITE COMMUNICATION AND RADIO ASTRONOMY SYSTEMS Yucheng Dai, PhD The University of Texas at Dallas, 2020 Supervising Professor: Dr. Hlaing Minn, Chair Wireless services, which utilize radio spectrum resources, can be classified into two types: passive wireless services and active wireless services. -
REVIEW ARTICLE the NASA Spitzer Space Telescope
REVIEW OF SCIENTIFIC INSTRUMENTS 78, 011302 ͑2007͒ REVIEW ARTICLE The NASA Spitzer Space Telescope ͒ R. D. Gehrza Department of Astronomy, School of Physics and Astronomy, 116 Church Street, S.E., University of Minnesota, Minneapolis, Minnesota 55455 ͒ T. L. Roelligb NASA Ames Research Center, MS 245-6, Moffett Field, California 94035-1000 ͒ M. W. Wernerc Jet Propulsion Laboratory, California Institute of Technology, MS 264-767, 4800 Oak Grove Drive, Pasadena, California 91109 ͒ G. G. Faziod Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 ͒ J. R. Houcke Astronomy Department, Cornell University, Ithaca, New York 14853-6801 ͒ F. J. Lowf Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721 ͒ G. H. Riekeg Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721 ͒ ͒ B. T. Soiferh and D. A. Levinei Spitzer Science Center, MC 220-6, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125 ͒ E. A. Romanaj Jet Propulsion Laboratory, California Institute of Technology, MS 264-767, 4800 Oak Grove Drive, Pasadena, California 91109 ͑Received 2 June 2006; accepted 17 September 2006; published online 30 January 2007͒ The National Aeronautics and Space Administration’s Spitzer Space Telescope ͑formerly the Space Infrared Telescope Facility͒ is the fourth and final facility in the Great Observatories Program, joining Hubble Space Telescope ͑1990͒, the Compton Gamma-Ray Observatory ͑1991–2000͒, and the Chandra X-Ray Observatory ͑1999͒. Spitzer, with a sensitivity that is almost three orders of magnitude greater than that of any previous ground-based and space-based infrared observatory, is expected to revolutionize our understanding of the creation of the universe, the formation and evolution of primitive galaxies, the origin of stars and planets, and the chemical evolution of the universe. -
In-Flight PSF Calibration of the Nustar Hard X-Ray Optics
In-flight PSF calibration of the NuSTAR hard X-ray optics Hongjun Ana, Kristin K. Madsenb, Niels J. Westergaardc, Steven E. Boggsd, Finn E. Christensenc, William W. Craigd,e, Charles J. Haileyf, Fiona A. Harrisonb, Daniel K. Sterng, William W. Zhangh aDepartment of Physics, McGill University, Montreal, Quebec, H3A 2T8, Canada; bCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA; cDTU Space, National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby, Denmark; dSpace Sciences Laboratory, University of California, Berkeley, CA 94720, USA; eLawrence Livermore National Laboratory, Livermore, CA 94550, USA; fColumbia Astrophysics Laboratory, Columbia University, New York NY 10027, USA; gJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA; hGoddard Space Flight Center, Greenbelt, MD 20771, USA ABSTRACT We present results of the point spread function (PSF) calibration of the hard X-ray optics of the Nuclear Spectroscopic Telescope Array (NuSTAR). Immediately post-launch, NuSTAR has observed bright point sources such as Cyg X-1, Vela X-1, and Her X-1 for the PSF calibration. We use the point source observations taken at several off-axis angles together with a ray-trace model to characterize the in-orbit angular response, and find that the ray-trace model alone does not fit the observed event distributions and applying empirical corrections to the ray-trace model improves the fit significantly. We describe the corrections applied to the ray-trace model and show that the uncertainties in the enclosed energy fraction (EEF) of the new PSF model is ∼<3% for extraction ′′ apertures of R ∼> 60 with no significant energy dependence. -
Herschel Space Observatory: Opening New Windows on the Universe
The Herschel Space Observatory: Opening New Windows on the Universe William B. Latter Project Scientist and Task Lead for the NASA Herschel Science Center Herschel Space Observatory Carrying on Sir William’s Legacy • Herschel is an ESA Cornerstone mission, equivalent to a NASA Great Observatory in scientific and programmatic scope. • Herschel will be the largest single element space telescope for astronomical use launched to date. • Herschel will be the first long-duration, space-based observatory to open up the spectral window between 200 and 700 microns. • Herschel will be the only infrared/submillimeter space observatory to fill the gap between Spitzer and JWST. • Herschel will carry out important Spitzer follow-up. 2 1 Herschel in a nutshell • ESA Cornerstone Observatory instruments ‘nationally’ funded, int’l - NASA, CSA, Poland – collaboration ~1/3 guaranteed time, ~2/3 open time • FIR/Submm (57 - 670 µm) space facility large (3.5 m), low emissivity (< 4%), passively cooled (< 90 K) telescope 3 focal plane science instruments ≥3 years routine operational lifetime full spectral access low and stable background • Unique and complementary for λ < 200 µm larger aperture than cryogenically cooled telescopes (IRAS, ISO, Spitzer, Astro-F,…) more observing time than balloon- and/or air-borne instruments larger field of view than interferometers 3 4 2 Spatial Resolution: Spitzer vs. Herschel Spitzer Herschel Herschel offers same spatial resolution as Spitzer at ~4 times the wavelength 5 More about Herschel HIFI - Heterodyne Instrument for the Far- Infrared PI: T. de Grauuw, SRON, Groningen, The Netherlands Spectroscopy with 5 or 6 receiver bands 480 -1250 GHz and 1410-1910 GHz, λ/Δλ up to 107 (625-240 µm and 213-157 µm) SPIRE - Spectral and Photometric Imaging Receiver PI: M. -
Building Nustar's Mirrors
20 | ASK MAGAZINE | STORY Title BY BUILDING NUSTAR’S MIRRORS Intro Many NASA projects involve designing and building one-of-a-kind spacecraft and instruments. Created for particular, unique missions, they are custom-made, more like works of technological art than manufactured objects. Occasionally, a mission calls for two identical satellites (STEREO, the Solar Terrestrial Relations Observatory, for instance). Sometimes multiple parts of an instrument are nearly identical: the eighteen hexagonal beryllium mirror segments that will form the James Webb Space Telescope’s mirror are one example. But none of this is mass production or anything close to it. nn GuisrCh/ASA N:tide CrothoP N:tide GuisrCh/ASA nn Niko Stergiou, a contractor at Goddard Space Flight Center, helped manufacture the 9,000 mirror segments that make up the optics unit in the NuSTAR mission. ASK MAGAZINE | 21 BY WILLIAM W. ZHANG The mirror segments my group has built for NuSTAR, the the interior surface and a bakeout, dries into a smooth and clean Nuclear Spectroscopic Telescope Array, are not mass produced surface, very much like glazed ceramic tiles. Finally we had to either, but we make them on a scale that may be unique at NASA: map the temperatures inside each oven to ensure they would we created more than 20,000 mirror segments over a period of two provide a uniform heating environment so the glass sheets years. In other words, we’re talking about some middle ground could slump in a controlled and gradual way. Any “wrinkles” between one-of-a-kind custom work and industrial production. -
Nustar Observatory Guide
NuSTAR Guest Observer Program NuSTAR Observatory Guide Version 3.2 (June 2016) NuSTAR Science Operations Center, California Institute of Technology, Pasadena, CA NASA Goddard Spaceflight Center, Greenbelt, MD nustar.caltech.edu heasarc.gsfc.nasa.gov/docs/nustar/index.html i Revision History Revision Date Editor Comments D1,2,3 2014-08-01 NuSTAR SOC Initial draft 1.0 2014-08-15 NuSTAR GOF Release for AO-1 Addition of more information about CZT 2.0 2014-10-30 NuSTAR SOC detectors in section 3. 3.0 2015-09-24 NuSTAR SOC Update to section 4 for release of AO-2 Update for NuSTARDAS v1.6.0 release 3.1 2016-05-10 NuSTAR SOC (nusplitsc, Section 5) 3.2 2016-06-15 NuSTAR SOC Adjustment to section 9 ii Table of Contents Revision History ......................................................................................................................................................... ii 1. INTRODUCTION ................................................................................................................................................... 1 1.1 NuSTAR Program Organization ..................................................................................................................................................................................... 1 2. The NuSTAR observatory .................................................................................................................................... 2 2.1 NuSTAR Performance ........................................................................................................................................................................................................ -
The Explorer Program
The Explorer Program Presentation to the Astrophysics Subcommittee Wilton Sanders Explorer Program Scientist Astrophysics Division NASA Science Mission Directorate November 19, 2013 1 Astrophysics Explorer Program • The Astrophysics and the Heliophysics Explorer Programs are separate. • Current Astrophysics Explorer Missions: - Operating (and will be included in the 2014 Senior Review) • Swift (MIDEX), launched 2004 November 20 • Suzaku (MO – partnered with JAXA), launched 2005 July 10 • NuSTAR (SMEX), launched 2012 June 13 - In Development • ASTRO-H (MO – partnered with JAXA), scheduled for launch in 2015 - In Formulation • NICER (MO), targeted for transportation to ISS in 2016 • TESS (EX), targeted for launch in 2017 • Future AOs - SMEX and MO in late summer/early fall 2014 for launch ~ 2020 - EX and MO NET 2016 for launch ~ 2022 2 2014 Astrophysics Explorer AO • Community Announcement released on 2013 November 12 that NASA will solicit proposals for SMEX missions and Missions of Opportunity. • Draft AO targeted for spring 2014, with Explorer Workshop ~ 2 weeks later. • Final AO targeted for late summer/early fall 2014, with Pre-Proposal Conference ~ 3 weeks after final AO release. Proposals due 90 days after AO release. • PI cost cap $125M (FY2015$) for SMEX, not including cost of ELV or transportation to the ISS. • MOs allowed in all three categories: Partner MO, New Missions using Existing Spacecraft, or Small Complete Mission, including those requiring flight on the ISS. • PI cost cap $35M for sub-orbital class MOs, which include ultra-long duration balloons, suborbital reusable launch vehicles, and CubeSats. Other MOs (not suborbital-class) have a $65M PI cost cap. • Two-step process. -
Valero Port Arthur Refinery Presents $750000 to Local Children's Charities
FOR IMMEDIATE RELEASE: VALERO PORT ARTHUR REFINERY PRESENTS $750,000 TO LOCAL CHILDREN’S CHARITIES Despite tournament’s cancellation, community support endures PORT ARTHUR, Texas, October 9, 2020 — The COVID-19 pandemic canceled the Valero Texas Open, like it did so many prominent events across the country, but it didn’t stop the tournament’s legacy of giving back. Business partners, sponsors and individual donors of the tournament and related events including the Valero Benefit for Children still contributed more than $14 million in net proceeds for charitable organizations across the United States, including those in the Port Arthur area. The Valero Port Arthur Refinery will distribute $750,000 to local charities with funds raised through the Valero Energy Foundation and the 2020 Valero Texas Open and Benefit for Children. “This is really positive news for our local nonprofit organizations, many of whom are facing challenges as a result of the pandemic,” said Mark Skobel, Vice President and General Manager of the Valero Port Arthur Refinery. “We know how important it is to continue supporting these agencies and the work they do for the children in our community.” The 2020 Valero Benefit for Children local recipients are: • Port Arthur Independent School District • Gulf Coast Health Center • YMCA of Southeast Texas • Communities in Schools of Southeast Texas • CASA of Southeast Texas • Southeast Texas Food Bank • Garth House, Mickey Mehaffy Children’s Advocacy Program • Richard Shorkey Education and Rehabilitation Center “We are blessed by our long-standing relationships with our tournament and Benefit for Children top sponsors,” said Joe Gorder, Valero Chairman and Chief Executive Officer. -
THURSDAY, NOVEMBER 14, 2013 Grand Hyatt Hotel San Antonio, Texas
THURSDAY, NOVEMBER 14, 2013 Grand Hyatt Hotel San Antonio, Texas THE PRIDE OF TEXAS BUSINESS WELCOME Mark M. Johnson Chairman, Texas Business Hall of Fame Edward E. Whitacre, Jr. Master of Ceremonies RECOGNITION OF TEXAS BUSINESS HALL OF FAME MEMBERS RECOGNITION OF 2013 INDUCTEES INVOCATION Reverend Trey H. Little DINNER RECOGNITION OF 2013 SCHOLARSHIP RECIPIENTS HALL OF FAME INDUCTION CEREMONY CLOSING REMARKS Mark M. Johnson Jordan Cowman Chairman, 2014, Texas Business Hall of Fame 2013 Inductees to the Texas Business Hall of Fame Charlie Amato Joseph M. “Jody” Grant Chairman/Co-Founder Chairman Emeritus and Texas Capital Bancshares, Inc. Gary Dudley Dallas President/Co-Founder SWBC H-E-B San Antonio Represented by Craig Boyan President, COO Tom Dobson San Antonio Chairman Whataburger Rex W. Tillerson San Antonio Chairman and CEO Exxon Mobil Corporation Paul Foster Irving Executive Chairman Western Refining, Inc. El Paso Charlie Amato & Gary Dudley Chairman/Co-Founder & President/Co-Founder SWBC | San Antonio Charlie Amato and Gary Dudley, Co-founders of SWBC, have had a long friendship. Through this friendship, they established SWBC, a company with more than three decades of dedication to not just great business and customer service, but also giving back to their community. Amato and Dudley met in grade school and were reunited in their college years. Both men graduated from Sam Houston State University with Bachelors of Business Administration degrees. After graduation they went their separate ways. Dudley became a coach and worked in the Houston school district for nine months before he was drafted into the armed forces. He spent six months on active duty with the US Marines (and six years as a reservist) before returning to coaching for another year. -
Planetary Defence Activities Beyond NASA and ESA
Planetary Defence Activities Beyond NASA and ESA Brent W. Barbee 1. Introduction The collision of a significant asteroid or comet with Earth represents a singular natural disaster for a myriad of reasons, including: its extraterrestrial origin; the fact that it is perhaps the only natural disaster that is preventable in many cases, given sufficient preparation and warning; its scope, which ranges from damaging a city to an extinction-level event; and the duality of asteroids and comets themselves---they are grave potential threats, but are also tantalising scientific clues to our ancient past and resources with which we may one day build a prosperous spacefaring future. Accordingly, the problems of developing the means to interact with asteroids and comets for purposes of defence, scientific study, exploration, and resource utilisation have grown in importance over the past several decades. Since the 1980s, more and more asteroids and comets (especially the former) have been discovered, radically changing our picture of the solar system. At the beginning of the year 1980, approximately 9,000 asteroids were known to exist. By the beginning of 2001, that number had risen to approximately 125,000 thanks to the Earth-based telescopic survey efforts of the era, particularly the emergence of modern automated telescopic search systems, pioneered by the Massachusetts Institute of Technology’s (MIT’s) LINEAR system in the mid-to-late 1990s.1 Today, in late 2019, about 840,000 asteroids have been discovered,2 with more and more being found every week, month, and year. Of those, approximately 21,400 are categorised as near-Earth asteroids (NEAs), 2,000 of which are categorised as Potentially Hazardous Asteroids (PHAs)3 and 2,749 of which are categorised as potentially accessible.4 The hazards posed to us by asteroids affect people everywhere around the world. -
Fully Nnn Medical Office Building Investment
FULLY NNN MEDICAL OFFICE BUILDING INVESTMENT 16088 SAN PEDRO, SAN ANTONIO, TEXAS 78232 Teresa L. Corbin, CCIM Jim Lundblad Office: 210.366.2222 Office: 210.366.2222 Mobile: 210.241.4686 Mobile: 210.602.5401 9311 San Pedro, Suite 850 [email protected] [email protected] San Antonio, Texas 78216 endurasa.com THE PROPERTY FULLY NNN MEDICAL OFFICE BUILDING INVESTMENT 16088 SAN PEDRO, SAN ANTONIO, TEXAS 78232 This investment property offering is an opportunity for an investor to acquire an income producing medical office building on Highway 281, a major north/south commercial and commuter corridor within San Antonio. Nearby businesses include restaurants, hotels, retail, banks, self storage, assisted living facility, office parks and office buildings. The building was built in 1986 and renovated in 2012. It has excellent visibility and frontage along Hwy 281. There is an abundance of parking, (free surface parking). The 28,255 square foot medical building is 100% leased to one of San Antonio’s largest healthcare systems. The Property is nestled among many well established subdivisions. This well established area and has an estimated 2020 population of 243,817 within a five mile radius. During the last 10 years, the population grew by 16.4% within this radius and is projected to grow another 6.4% by the year 2025. The estimated households for 2020 is at 97,190 with a projected growth of 5.9% by the year 2025, totaling 102,910 households. This area is also home to 12,190 businesses within the five mile radius and has an estimated 118,329 employees. -
Observations from Orbiting Platforms 219
Dotto et al.: Observations from Orbiting Platforms 219 Observations from Orbiting Platforms E. Dotto Istituto Nazionale di Astrofisica Osservatorio Astronomico di Torino M. A. Barucci Observatoire de Paris T. G. Müller Max-Planck-Institut für Extraterrestrische Physik and ISO Data Centre A. D. Storrs Towson University P. Tanga Istituto Nazionale di Astrofisica Osservatorio Astronomico di Torino and Observatoire de Nice Orbiting platforms provide the opportunity to observe asteroids without limitation by Earth’s atmosphere. Several Earth-orbiting observatories have been successfully operated in the last decade, obtaining unique results on asteroid physical properties. These include the high-resolu- tion mapping of the surface of 4 Vesta and the first spectra of asteroids in the far-infrared wave- length range. In the near future other space platforms and orbiting observatories are planned. Some of them are particularly promising for asteroid science and should considerably improve our knowledge of the dynamical and physical properties of asteroids. 1. INTRODUCTION 1800 asteroids. The results have been widely presented and discussed in the IRAS Minor Planet Survey (Tedesco et al., In the last few decades the use of space platforms has 1992) and the Supplemental IRAS Minor Planet Survey opened up new frontiers in the study of physical properties (Tedesco et al., 2002). This survey has been very important of asteroids by overcoming the limits imposed by Earth’s in the new assessment of the asteroid population: The aster- atmosphere and taking advantage of the use of new tech- oid taxonomy by Barucci et al. (1987), its recent extension nologies. (Fulchignoni et al., 2000), and an extended study of the size Earth-orbiting satellites have the advantage of observing distribution of main-belt asteroids (Cellino et al., 1991) are out of the terrestrial atmosphere; this allows them to be in just a few examples of the impact factor of this survey.