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Grow Text SizeShrink Text Size Send ShareDownload to Computer1. Terrestrial             Planet Finder Interferometer Formation Control Performance             Demonstration Online             Source: Click to View PDF File [PDF Size: 9.8             MB]Author: Schwarf, Daniel P; Lawson, Peter             R.            Abstract:             This document reports the achievement of             Terrestrial Planet Finder Interferometer (TPF-I) Technology             Milestone #2, a ground-based, system-level             demonstration of two-spacecraft formation             synchronized rotation. We review the milestone specification from             the Milestone White Paper (May 25, 2007), summarize the experiments performed in the Formation Control             Testbed (FCT), detail the procedures and analysis of the resulting             data, and describe and present the data             itself.NASA Center: Jet Propulsion             LaboratoryPublication Year:             2008Document ID:             20080032494Report/Patent Number: JPL             -Publ-08-11, TPF-1 Technology Milestone #2 ReportUpdated/Added to             NTRS: May 14, 20092. Scientific Assessment of Ozone Depletion: 2002.             Pursuant to Article 6 of the Montreal Protocol on Substances that             Deplete the Ozone Layer Online             Source: Click to View PDF File [PDF Size: 79.9 MB]            Abstract:             Since the Scientific Assessment of Ozone Depletion: 1998, numerous             laboratory investigations,             atmospheric observations, and theoretical             and modeling studies have produced new key findings and have             strengthened overall understanding of the ozone layer and its effect             on ultraviolet (UV) radiation. These advances are highlighted in the             following summary of the current understanding of the impact of             human activities and natural phenomena on the ozone layer and the             coupling of the ozone layer and the climate system. In the             troposphere (i.e., lower atmosphere), observations show that the             total combined effective abundance of ozone-depleting compounds             continues to decline slowly from the peak that occurred in             1992-1994. Total chlorine is declining, while bromine from             industrial halons is still increasing, albeit at a slower rate than             was occurring previously (and as reported             in the 1998 Assessment). Analyses of air trapped in snow since the             late 19th century have confirmed that non-industrial sources of the             CFCs, halons, and major chlorocarbons were insignificant. The             abundances of HCFCs in the lower atmosphere continue to increase.             Observations in the stratosphere indicate that the total chlorine             abundance is at or near a peak, while bromine abundances are             probably still increasing. Very short-lived organic chlorine-,             bromine-, and iodine-containing source gases have the potential to             deplete stratospheric ozone, but quantitative estimation of their             potentials is more challenging than for longer-lived species like             CFCs.NASA Center: NASA (Unspecified             Center)Publication Year:             2003Document ID:             20100002857Report/Patent Number: Report No. 47Updated/Added to             NTRS: Jan 20, 20103. High Leverage Space Transportation System Technologies             for Human Exploration Missions to the Moon and Beyond             Online Source: Click to             View PDF File [PDF Size: 1.3             MB]Author: Borowski, Stanley K.; Dudzinski,             Leonard A.            Abstract:             The feasibility of returning humans to the Moon by 2004, the 35th             anniversary of the Apollo 11             landing, is examined assuming the use of             existing launch vehicles (the Space Shuttle and Titan 4B), a near             term, advanced technology space transportation system, and             extraterrestrial propellant--specifically 'lunar-derived' liquid             oxygen or LUNOX. The lunar transportation system (LTS) elements             consist of an expendable, nuclear thermal rocket (NTR)-powered             translunar injection (TLI) stage and a combination lunar             lander/Earth return vehicle (LERV) using cryogenic liquid oxygen and             hydrogen (LOX/LH2) chemical propulsion. The 'wet' LERV, carrying a             crew of 2, is configured to fit within the Shuttle orbiter cargo bay             and requires only modest assembly in low Earth orbit. After Earth             orbit rendezvous and docking of the LERV with the Titan 4B-launched             NTR TLI stage, the initial mass in low Earth orbit (IMLEO) is             approx. 40 t. To maximize mission performance at minimum mass, the             LERV carries no return LOX but uses approx. 7 t of LUNOX to             'reoxidize' itself for a 'direct return' flight to Earth followed by             an 'Apollo-style' capsule recovery. Without LUNOX, mission             capability is constrained and the total LTS mass approaches the             combined Shuttle-Titan 4B IMLEO limit of approx. 45 t even with             enhanced NTR and chemical engine performance. Key technologies are             discussed, lunar mission scenarios described, and LTS vehicle             designs and characteristics are presented. Mission versatility             provided by using a small 'all LH2' NTR engine or a 'LOX-augmented'             derivative, either individually or in clusters, for outer planet             robotic orbiter, small Mars cargo, lunar 'commuter', and human Mars             exploration class missions is also briefly             discussed.NASA Center: Glenn Research             CenterPublication Year:             1996Document ID:             19960049765Accession Number:             96N34009Report/Patent Number: NASA-TM-107295,             NAS 1.15:107295, AIAA Report 96-2810,             E-10373Updated/Added to NTRS: May 12,           20084. The Mariner Planetary Communication System             Online Source: Click to             View PDF File [PDF Size: 23.6             MB]Author: Martin, Benn D.            Abstract:             The United States is developing an 1100-lb spacecraft, the Mariner, to be launched to the             near             vicinity of the planet Venus. The mission             objectives are briefly described, followed by a discussion of the             design constraints imposed upon the communication system by the             mission and launch dates. Interplanetary space communications             state-of-the-art is then discussed. leading to a prediction of the             available system bit-rate capacity for this and future missions. The             general over-all design of the communication system to be employed             on the Mariner mission is presented, and a detailed description is             given of the mechanization of the command and telemetry systems.             Emphasis is placed upon the unique synchronization method which             makes possible the use of near-optimum binary data transmission             techniques.NASA Center: Jet Propulsion             Laboratory; Wallops Flight FacilityPublication             Year: 1961Document ID:             20100042179Report/Patent Number: CR-69585,             JPL-TP-32-85, Technical Report No.             32-85Updated/Added to NTRS: Dec 17,         20105. Report on active and planned             spacecraft and experiments Online             Source: Click to View PDF File [PDF Size: 188.6             MB]Author: Schofield, N. J., Jr.; Littlefield,             R. G.; Elsen, M. F.            Abstract:             This report provides the professional             community with information on current and planned spacecraft                         activity (including both free-flying spacecraft and Shuttle-attached payloads) for a             broad range of scientific disciplines. By providing a brief             description of each spacecraft and             experiment as well as its current status, it is hoped that this             document will be useful to many people interested in the scientific,             applied, and operational uses of the data collected. Furthermore,             for those investigators who are planning or coordinating future             observational programs employing a number of different techniques             such as rockets, balloons, aircraft, ships, and buoys, this document             can provide some insight into the contributions that may be provided             by orbiting instruments. The document includes information             concerning active and planned spacecraft             and experiments. The information covers a             wide range of scientific disciplines: astronomy, earth sciences,             meteorology, planetary sciences, aeronomy, particles and fields,             solar physics, life sciences, and material sciences. These spacecraft projects represent the efforts and             funding of individual countries, as well as cooperative arrangements             among different countries.NASA Center:             Goddard Space Flight CenterPublication Year:             1985Document ID:             19860003875Accession Number:             86N13343Report/Patent Number: NASA-TM-87499,             NSSDC/WDC-A-R/S-85-01, NAS 1.15:87499Updated/Added to             NTRS: Jun 13, 20116. Report on active and planned             spacecraft and experiments Online             Source: Click to View PDF File [PDF Size: 38.1             MB]Author: Littlefield, R. G.            Abstract:             Information concerning active and planned spacecraft             and experiments is included. The             information             covers a wide range of scientific             disciplines: astronomy, earth sciences, meteorology, planetary             sciences, aeronomy, particles and fields, solar physics, life             sciences, and material sciences. These spacecraft projects represent the efforts and             fundng of individual countries as well as cooperative arrangements             among different countries.NASA Center:             Goddard Space Flight CenterPublication Year:             1983Document ID:             19840003119Accession Number:             84N11187Report/Patent Number: NASA-TM-85455,             NAS 1.15:85455, NSSDC/WDC-A-R/S-83-08Updated/Added to             NTRS: Feb 26, 20107. Report on Active and Planned             Spacecraft and experiments Online             Source: Click to View PDF File [PDF Size: 22.9             MB]Author: Vostreys, R. W.; Maitson, H. H.            Abstract:             Active and planned spacecraft             activity and experiments between June 1,             1980 and May 31, 1981 known             to the National Space Science Data Center             are described. The information covers a wide range of disciplines:             astronomy, Earth sciences, meteorology, planetary sciences,             aeronomy, particles and fields, solar physics, life sciences, and             material sciences. Each spacecraft and             experiment is described and its current status presented.             Descriptions of navigational and communications satellites and of             spacecraft that contain only continuous             radio beacons used for ionospheric studies are specifically             excluded.NASA Center: Goddard Space             Flight CenterPublication Year:             1981Document ID:             19820002214Accession Number:             82N10087Report/Patent Number: NASA-TM-84025,             NSSDC/WDC-A-R/S-81-10Updated/Added to NTRS: Jun             13, 20118. Report on active and planned             spacecraft and experiments Online             Source: Click to View PDF File [PDF Size: 25.8             MB]Author: Horowitz, R.; Nostreys, R. W.            Abstract:             Information on current and planned spacecraft activity for a broad range of             scientific disciplines             is presented. The information covers a wide             range of disciplines: astronomy, Earth sciences, meteorology,             planetary sciences, aeronomy, particles and fields, solar physics,             life sciences, and material sciences. These spacecraft projects represent the efforts and             funding of individual countries as well as cooperative arrangements             among different countries.NASA Center:             Goddard Space Flight CenterPublication Year:             1980Document ID:             19800022914Accession Number:             80N31420Report/Patent Number: NASA-TM-80905,             NSSDC/WDC-A-R/S-80-06Updated/Added to NTRS: Apr             01, 20109. Report on Active and Planned             Spacecraft and Experiments Online             Source: Click to View PDF File [PDF Size: 33.2             MB]Author: Vostreys, R. W.; Horwitz, R.            Abstract:             Information concerning concerning active             and planned spacecraft and experiments known to the             National Space Science Data Center are             included. The information contains a wide range of disciplines:             astronomy, earth sciences, meteorology, planetary sciences,             aeronomy, particles and fields, solar physics, life sciences, and             material sciences. These spacecraft             projects represent the efforts and funding of individual countries             as well as cooperative arrangements among different countries.             Approximately 850 articles are included.NASA             Center: Goddard Space Flight CenterPublication             Year: 1979Document ID:             19790025054Accession Number:             79N33225Report/Patent Number: NASA-TM-80505,             NSSDC/WDC-A-R/S-79-03Updated/Added to NTRS: Sep             02, 201110. Report on active and planned             spacecraft and experiments Online             Source: Click to View PDF File [PDF Size: 19.2             MB]Author: Vette, J. I.; Vostreys, R. W.;             Horowitz, R.            Abstract:             Information is presented, concerning active and planned             spacecraft and experiments known to the             National Space Science Data Center. The             information included a wide range of disciplines: astronomy, earth             sciences, meteorology, planetary sciences, aeronomy, particles and             fields, solar physics, life sciences, and material sciences. These             spacecraft projects represented the             efforts and funding of individual countries as well as cooperative             arrangements among different countries.NASA             Center: Goddard Space Flight CenterPublication             Year: 1978Document ID:             19790003950Accession Number:             79N12121Report/Patent Number: NASA-TM-79760,             NSSDC/WDC-A-R&amp;S-78-04Updated/Added to             NTRS: Aug 09, 2011› Back       to TopDownload to Computer
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