Дисертації з теми "Space tracking"
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Grelck, John, Eldon Ehrsam, and James A. Means. "Space Tracking Systems/ Options Study." International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/611727.
Повний текст джерелаThis paper presents the findings of the Space Tracking Systems/Options Study (STS/OS) and indicates its impact on the telemetering community. The STS/OS was commissioned by Air Force Test & Evaluation (AF/TE) to develop a long range plan (vision and roadmap) for the AF Test & Evaluation (T&E) community to ensure affordable capabilities (telemetry, tracking and commanding) for the future (2003-2008). The study was conducted by the Air Force Materiel Command (AFMC), Space & Missile Systems Center (SMC), Detachment 9, at Vandenberg AFB (VAFB), with support from the primary AFMC T&E centers, the Air Force Operational Test & Evaluation Command (AFOTEC), and the Air Force Space Command (AFSPC). Both "open air" aeronautical and astronautical test needs were considered. The study solicited requirements for existing and future programs, extrapolated existing and planned test capabilities out into the future, then compared the two to identify future shortfalls in capabilities and specific actions that are necessary to insure that the future program needs can be met. Three critical types of testing were identified that cannot be satisfied with existing or planned instrumentation. These are: large area testing (LAT), over the horizon testing (OTH), and space weapons testing (SWT). A major deficiency was also uncovered in end game scoring for air and space intercepts, where inadequate capability exists to perform the required vector miss-distance measurement. This paper is important to the telemetering community because it identifies the Global Positioning System (GPS) as the primary time space position information (TSPI) system for all future open air testing. GPS provides a passive capability that permits each vehicle to determine its own precise TSPI. Means must be provided, however, for the vehicle to relay its position to the appropriate range control center. The paper shows that the problems with down linking telemetry, aircraft buss data, digital audio, digital video, and TSPI collectively represent the need for a very capable datalink. Likewise, the need to uplink commands, synthetic targets, synthetic backgrounds, and target control information also represents the need for a very capable datalink. With its extensive expertise in RF linkages, the telemetering community is ideally suited to address this need for a robust datalink for the future of T&E.
Turner, W. C., and R. A. Potter. "UNATTENDED SPACE-DIVERSITY TELEMETRY TRACKING ANTENNA SYSTEM." International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/608826.
Повний текст джерелаA remotely-operated ground telemetry tracking and receiving station is described. The station, operating in a space-diversity mode, is capable of reception and tracking both at VHF and at UHF. The station can be configured and operated from a distance of 240 km using a wide-band land data link. Uplink command at VHF is included as part of the station.
Graziani, Alberto <1980>. "Troposphere Calibration Techniques for Deep Space Probe Tracking." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3023/.
Повний текст джерелаNtawiniga, Frédéric. "Head Motion Tracking in 3D Space for Drivers." Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25229/25229.pdf.
Повний текст джерелаThis work presents a computer vision module capable of tracking the head motion in 3D space for drivers. This computer vision module was designed to be part of an integrated system to analyze the behaviour of the drivers by replacing costly equipments and accessories that track the head of a driver but are often cumbersome for the user. The vision module operates in five stages: image acquisition, head detection, facial features extraction, facial features detection, and 3D reconstruction of the facial features that are being tracked. Firstly, in the image acquisition stage, two synchronized monochromatic cameras are used to set up a stereoscopic system that will later make the 3D reconstruction of the head simpler. Secondly the driver’s head is detected to reduce the size of the search space for finding facial features. Thirdly, after obtaining a pair of images from the two cameras, the facial features extraction stage follows by combining image processing algorithms and epipolar geometry to track the chosen features that, in our case, consist of the two eyes and the tip of the nose. Fourthly, in a detection stage, the 2D tracking results are consolidated by combining a neural network algorithm and the geometry of the human face to discriminate erroneous results. Finally, in the last stage, the 3D model of the head is reconstructed from the 2D tracking results (e.g. tracking performed in each image independently) and calibration of the stereo pair. In addition 3D measurements according to the six axes of motion known as degrees of freedom of the head (longitudinal, vertical and lateral, roll, pitch and yaw) are obtained. The validation of the results is carried out by running our algorithms on pre-recorded video sequences of drivers using a driving simulator in order to obtain 3D measurements to be compared later with the 3D measurements provided by a motion tracking device installed on the driver’s head.
Jerome, Richard Carleton University Dissertation Engineering Electrical. "Performance analysis of space-based radar tracking techniques." Ottawa, 1990.
Знайти повний текст джерелаDundar, Ismail Ugur. "Improvement of a Space Surveillance Tracking Analysis Tool." Thesis, Luleå tekniska universitet, Rymdteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71905.
Повний текст джерелаFiusco, Francesco. "Improvement of a Space Surveillance and Tracking Analysis tool." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-247880.
Повний текст джерелаDetta examensarbete handlar om förbättringar av SPOOK (observation av rymdobjekt ochKalmanfiltrering), ett beräkningsverktyg för omloppsbanor utvecklat av Airbus Defence och Space GmbH. Detta arbete syftar till att förbättra arkitekturen hos programvaran och dess förmåga att utföra analys på olika nivåer:•Designa och bygga ett ramverk användes SPOOK som beräkningsmotor och använda dess kapacitet för att bygga ett komplett SST-system för konstgjorda material kretsande runt jorden, tillhandahålla kommersiella tjänster (e.g. undvika kollision, visualisering, analys av återinträde etc.), katalogunderhåll och simuleringar. En komplett Python-API designades och implementerades, som nu gör SPOOK till ett komplett katalogiseringssystem för konstgjorda rymdobjekt som kan tillhandahålla tjänster för slutanvändare;•Uppskatta kovariansen av TLE data publicerad av US Space Command (tillgängligt via Space-track.org);•Utforma och validera kvalitetskoefficienter som automatiskt kan bedöma kvaliteten hos uppskattningen av en omloppsbana och därmed minimera interaktionen med användaren;Preliminärt implementera en snabb lösare för Lambertproblem.
Hrabe, Jan, and Sabina Hrabetova. "Fast optical tracking of diffusion in brain extracellular space." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196897.
Повний текст джерелаHoefener, Carl E. "GPS: THE LOGICAL TOOL FOR PRECISION TRACKING IN SPACE." International Foundation for Telemetering, 1991. http://hdl.handle.net/10150/613092.
Повний текст джерелаAs we develop more space vehicles, a pressing requirement emerges to provide precision tracking information. This need for exact time and space-position information (TSPI) persists whether developing and testing space weapons or locating the precise position of intelligence-gathering satellites. Because this is a worldwide tracking requirement, the use of conventional tracking techniques such as radar is precluded. Fortunately the Global Positioning System (GPS) is now in place and can provide the tracking information required. GPS offers two techniques for tracking space vehicles. A GPS receiver can be installed on the vehicle to determine the position that is then relayed to a ground terminal, or a GPS frequency translator can be used to compute the vehicle position at the master groundsite. Since both techniques have been proven satisfactory, the specific tracking requirement determines the method selected. For the flight tests of the Exoatmospheric Reentry-Vehicle Interceptor Subsystem (ERIS), the GPS frequency translator technique is used. A GPS frequency translator is installed on the target (a reentry-vehicle launched on a Minuteman from Vandenberg), and a translator is also installed on the ERIS, which is launched from Meck Island in the Kwajalein Atoll. The GPS frequency translator approach was chosen for these tests for a variety of reasons, the most important of which were the limited instrumentation space on the target and interceptor, the extreme dynamics of the interceptor, the tracking accuracy required, and the range at which the operation must be tracked. For the tracking of orbiting satellites, a GPS receiver can be flown on the satellite with its derived position information continuously stored. This data can then be dumped as the satellite passes over a selected groundsite.
Hrabe, Jan, and Sabina Hrabetova. "Fast optical tracking of diffusion in brain extracellular space." Diffusion fundamentals 2 (2005) 120, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14461.
Повний текст джерелаSharifi, Mohammad A. "Satellite to satellite tracking in the space-wise approach." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-28337.
Повний текст джерелаAlam, Sayeed Safayet. "Analysis of Eye-Tracking Data in Visualization and Data Space." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3473.
Повний текст джерелаHoefener, Carl E., and Lawrence Wells. "UTILIZING GPS FOR ULTRA-HIGH DYNAMIC VEHICLE TRACKING IN SPACE." International Foundation for Telemetering, 1986. http://hdl.handle.net/10150/615581.
Повний текст джерелаGPS will provide a very attractive means to track kinetic energy weapons in space for the Strategic Defense Initiative programs for system test and evaluation. However, the small size and very high dynamics of these vehicles complicate the use of GPS. This paper considers these issues and suggests a solution.
Chen, Yifeng. "Control of a flexible space robot tracking a moving target." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/39725.
Повний текст джерелаWang, Jue Computer Science & Engineering Faculty of Engineering UNSW. "Vehicle tracking using scale invariant features." Publisher:University of New South Wales. Computer Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41290.
Повний текст джерелаKohlleppel, Robert [Verfasser]. "Ground moving target tracking with space-time adaptive radar / Robert Kohlleppel." Siegen : Universitätsbibliothek der Universität Siegen, 2015. http://d-nb.info/107199199X/34.
Повний текст джерелаHo, Tzung-Hsien. "Pointing, acquisition, and tracking systems for free-space optical communication links." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6734.
Повний текст джерелаThesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Zheng, Sue M. Eng Massachusetts Institute of Technology. "Tracking algorithms under boundary layer effects for free-space optical communications." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/53185.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 87-88).
Free-space optical communication requires accurate tracking to maintain links. The tracking problem between an aircraft and satellite becomes more difficult with the introduction of a turret on the aircraft for increased field-of-regard. In the case of a hemispherical turret, the disrupted airflow at the boundary layer can greatly distort the optical beam. A model of the communication link is created to compare the performance of several tracking algorithms. We investigate the best algorithm under various atmospheric conditions and signal-to-noise ratios.
by Sue Zheng.
M.Eng.
Novosad, Sidney W. "Spectrum Utilization for the International Space Station Communications and Tracking Systems." International Foundation for Telemetering, 1987. http://hdl.handle.net/10150/615227.
Повний текст джерелаOver its lifetime, the international Space Station Program will use a variety of communications and tracking systems which could span the frequency spectrum from VHF to optical wavelengths. Primary communications traffic will initially occur in the S-band and Ku-band regions. Tracking will initially consist mostly of L-band satellite links. As the demand for more C&T services increases in the growth phase, use of millimeter and optical wavelengths will be required. Although many issues remain to be resolved, the most significant interference concern at present is that of Ku-band space/space links between co-orbiting Space Station elements.
Cirillo, Giovanni. "Space Surveillance and Tracking Tool: Implementation and Test of New Methods." Thesis, KTH, Rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262030.
Повний текст джерелаI mars 2019 uppgick antalet konstgjorda föremål större än 1 mm i omloppsbana runt jorden till över 170 miljoner. Av dessa är endast en mycket liten andel (0.03%) katalogiserade. En kollision mellan en operativ satellit och ett annat föremål i bana kan helt eller delvis förstöra satelliten. För att reducera risken för kollisioner är det därför viktigt att katalogisera så många föremål som möjligt. Detta görs genom att använda programvaran "Space Object Observations and Kalman Filtering" (SPOOK), som utvecklats av företaget Airbus Defence and Space i Friedrichshafen, Tyskland. Målet med detta examensarbete var att skapa nya funktioner i programvara samt att förbättra de befintliga funktionerna. Tre huvudmål har uppnåtts: • En ny modell för ljusförhållandet har skapats för att ta hänsyn till ocklutationen av solen på grund av en täckande kropp (till exempel jorden eller månen) och dess påverkan på solstrålningstrycket på rymdfarkosten, vilket är nödvändigt för att ha en bra modell för hur omloppsbanan fortplantas • En algoritm för s.k. tracklets, flera observationer av samma föremål längs dess omlopp, har skapats i syfte att skilja mellan olika tracklets som utgångspunkt för bestämma vilka mätningar som tillhör samma föremål vid avlägsna epoker. Detta är nödvändigt för att korrekt kunna uppdatera katalogen över rymdföremål. • Modellen för att ta hänsyn till processbruset har förbättrats och förslag ges om hur man ställer in olika parametrar för olika slags omloppsbanor.
Jefferies, Lisa N. "Tracking attention in space and time : the dynamics of human visual attention." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/11564.
Повний текст джерелаSchnorr, Andrea Verfasser], Torsten [Akademischer Betreuer] [Kuhlen, and Christoph [Akademischer Betreuer] Garth. "Feature tracking for space-filling structures / Andrea Schnorr ; Torsten Kuhlen, Christoph Garth." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1230661697/34.
Повний текст джерелаWittrock, Jason M. "Free-Electron Laser (FEL) utilization in space applications (ship-borne pointing accuracy, deep-space communications, and orbital debris tracking)." Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/10710.
Повний текст джерелаRoca, Carceller Guillem. "Tracking environmental change in seagrass meadows: understanding indicator behaviour across space and time." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/325415.
Повний текст джерелаEntendre com responen les fanerògames marines a les pressions, és clau per a poder gestionar tant els herbeis com les aigües costaneres. Actualment, disposem d’un gran nombre d’indicadors basats en fanerògames marines. Però, la manca d’informació sobre com responen als canvis ambientals, fa que no sigui fàcil escollir quins indicadors són els més adients per a cada tipus i objectiu de gestió. Aquesta tesi avalua les tres característiques bàsiques de la resposta dels indicadors més utilitzats als canvis ambientals: la robustesa de la resposta, la especificitat dels indicadors a diferents pressions i el temps de resposta. Per analitzar aquestes tres característiques, fem servir diferents aproximacions complementàries. Al capítol 3, analitzem la resposta de diferents indicadors a les obres d’ampliació del port de Blanes, situat just al costat d’un herbei de Posidonia oceanica. Als capítols 4 i 5, estudiem com responen els indicadors a la millora de la qualitat de l’aigua a la costa catalana. Finalment, al capítol 6, presentem una metaanàlisi que estudia com responen els indicadors a diferents factors d’estrès. De totes tres aproximacions, hem pogut comprovar que el nivell d’organització dels indicadors (i.e. bioquímic, estructural) és clau a l’hora de determinar el grau d’especificitat de la resposta dels indicadors a les pressions: generalment, a més baix nivell d’organització (e.g. bioquímic), més específica és la resposta i com més alt (e.g. demogràfic), més ampli és el rang de pressions que un indicador pot detectar. El temps de resposta dels indicadors varia també en funció del nivell d’organització dels indicadors, especialment, quan es tracta de la detecció de millores ambientals. A més a més, la metaanàlisi destaca la importància de la mida de les plantes per determinar el temps de resposta. Les espècies grans triguen més a detectar la degradació de les condicions ambientals i, molt més, a detectar la millora, especialment, si s’utilitzen indicadors estructurals o demogràfics. Basant-nos en els resultats d’aquesta tesi, hem elaborat un esquema per ajudar els gestors a escollir el conjunt d’indicadors que més s’ajusti a cada objectiu de gestió. Utilitzats correctament, aquests indicadors són molt útils per fer el seguiment, tant de l’estat de salut dels herbeis, com de la qualitat del medi.
Persen, Todd. "FPGA-BASED DESIGN OF A MAXIMUM-POWER-POINT TRACKING SYSTEM FOR SPACE A." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3126.
Повний текст джерелаM.S.E.E.
Department of Electrical and Computer Engineering
Engineering and Computer Science
Electrical Engineering
Lollini, Emanuele. "Analysis of multi-station technique for noise reduction in Deep Space Doppler tracking." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25914/.
Повний текст джерелаRicci, Ester. "The passage from microstrip to pixel silicon detectors for tracking particles in space." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/250674.
Повний текст джерелаHalterman, R. Ryan. "Observation and tracking of tropical cyclones using resolution enhanced scatterometry /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1667.pdf.
Повний текст джерелаDe, Wet Sarel Joubert. "Development of a system for tracking objects in a confined space / S.J. de Wet." Thesis, North-West University, 2009. http://hdl.handle.net/10394/4010.
Повний текст джерелаTam, Tapia Augusto José. "Space craft reliable trajectory tracking and landing using model predictive control with chance constraints." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8897.
Повний текст джерелаTesis
Prisacariu, Victor Adrian. "Shape knowledge for segmentation and tracking." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:68dd7205-219a-45e1-830d-f55e530ed8aa.
Повний текст джерелаJohansson, Anders. "Acoustic Sound Source Localisation and Tracking : in Indoor Environments." Doctoral thesis, Blekinge Tekniska Högskola [bth.se], School of Engineering - Dept. of Signal Processing, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00401.
Повний текст джерелаCevher, Volkan. "A Bayesian Framework for Target Tracking using Acoustic and Image Measurements." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6824.
Повний текст джерелаLi, Ni. "Vision based trajectory tracking of space debris in close proximity via integrated estimation and control." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4966.
Повний текст джерелаID: 029809810; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.)--University of Central Florida, 2011.; Includes bibliographical references (p. 41-48).
M.S.
Masters
Mechanical, Materials, and Aerospace Engineering
Engineering and Computer Science
Eisenberg, Rebecca Nicole. "Reexamining the Global Cold War in South Africa: Port Usage, Space Tracking and Weapons Sales." PDXScholar, 2012. https://pdxscholar.library.pdx.edu/open_access_etds/117.
Повний текст джерелаHe, Chao. "Advanced wavelet application for video compression and video object tracking." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1125659908.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xvii, 158 p.; also includes graphics (some col.). Includes bibliographical references (p. 150-158). Available online via OhioLINK's ETD Center
Ackerman, Samuel. "A Probabilistic Characterization of Shark Movement Using Location Tracking Data." Diss., Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/499173.
Повний текст джерелаPh.D.
Our data consist of measurements of 22 sharks' movements within a 366-acre tidal basin. The measurements are made at irregular time points over a 16-month interval. Constant-length observation intervals would have been desirable, but are often infeasible in practice. We model the sharks' paths at short constant-length intervals by inferring their behavior (feeding vs transiting), interpolating their locations, and estimating parameters of motion (speed and turning angle) in environmental and ecological contexts. We are interested in inferring regional differences in the sharks' behavior, and behavioral interaction between them. Our method uses particle filters, a computational Bayesian technique designed to sequentially model a dynamic system. We discuss how resampling is used to approximate arbitrary densities, and illustrate its use in a simple example of a particle filter implementation of a state-space model. We then introduce a particular model formulation that uses conditioning to introduce unobserved parameters for the shark's behaviors. We show how the irregularly-observed shark locations can be modeled by interpolation as a set of movements at constant-length time intervals. We use a spline method for generating approximations of the ground truth at these intervals for comparison with our model. Finally, we demonstrate our model's estimates of the sharks' behavioral and ecological parameters of interest on a subset of the observed data.
Temple University--Theses
Popovic, Jelena. "Fast Adaptive Numerical Methods for High Frequency Waves and Interface Tracking." Doctoral thesis, KTH, Numerisk analys, NA (stängd 2012-06-30), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105062.
Повний текст джерелаQC 20121116
Suwantong, Rata. "New Structure for Moving Horizon Estimators. Application to Space Debris Tracking during the Atmospheric Re-entries." Thesis, Supélec, 2014. http://www.theses.fr/2014SUPL0023/document.
Повний текст джерелаSpace debris tracking during atmospheric re-entries will be a crucial challenge in the coming years, emphasized through many projects on space debris mitigation established by space agencies worldwide. However, this problem appears to be complex, due to model errors and difficulties to properly initialize the estimation algorithms, as a result of unknown dynamics of the debris and their disintegrations during the re-entries. A-to-be used estimator for this problem must be robust against these factors. The Moving Horizon Estimator (MHE) is known in the literature to be robust to model errors and bad initialization, and the PhD work has proved its ability to satisfy performances required by the debris tracking during the re-entries. However, its optimization-based framework induces a large computation time. To overcome this, a new MHE structure which requires smaller computation time than the classical MHE has been developed. This strategy, so-called “Moving Horizon Estimator with Pre-Estimation (MHE-PE)” takes into account model errors by using an auxiliary estimator rather than by searching for estimates of the process noise sequence over the horizon as in the classical strategy. A theorem which guarantees the stability of the dynamics of the estimation errors of the MHE-PE has also been proposed. Finally, performances of this structure in the context of 3D space debris tracking during the re-entries have been shown to be better than those obtained with classical estimators including the MHE. In particular, without degrading accuracy of the estimates and convergence of the estimator, the MHE-PE estimator requires smaller computation time than the MHE thanks to its small number of optimization variables
Nguyen, Tam Nguyen Thuc. "Laser beacon tracking for free-space optical communication on small-satellite platforms in low-earth orbit." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101446.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 91-94).
Free-space optical (FSO) communication, or laser communication, is capable of providing high-rate communication links, meeting the growing downlink demand of space missions, including those on small-satellite platforms. FSO communication takes advantage of the high-gain nature of narrow laser beams to achieve higher link efficiency than traditional radio-frequency systems. In order for a FSO link to be established and maintained, the spacecraft's attitude determination and control system needs to provide accurate pointing at the optical ground station. However, small satellites, such as CubeSats, have limited ground-tracking capabilities with existing attitude sensors. Miniaturized laser beacon tracking system, on the other hand, has the potential to provide precise ground-based attitude knowledge, enabling laser communication to be accomplished on small-satellite platforms. This thesis details the development of a CubeSat-sized laser beacon camera capable of achieving a sub-milliradian attitude knowledge accuracy with low fade probability during various sky conditions, sufficient to support a high-rate FSO communication link on a CubeSat platform on low-Earth orbit. The high-level Nanosatellite Optical Downlink Experiment (NODE) system architecture, the beacon camera conceptual design as well as prototype development are presented in detail. An end-to-end beacon simulation was constructed to validate the attitude sensing performance of the module under expected atmospheric turbulence and sky brightness conditions. The simulation results show a high-accuracy attitude sensing performance and low fade probability, capable of supporting NODE's laser links.
by Tam Nguyen Thuc Nguyen.
S.M.
Conrad, Ross Aaron. "Impact of the boundary layer on pointing and tracking in airborne free-space laser communication links." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44929.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes vita.
Includes bibliographical references (p. 117-118).
Free-space laser communication is a developing technology with enormous potential to revolutionize the way people communicate across the globe. Of specific interest are air-to-space lasercom links. Such a link experiences atmospheric scintillation, platform jitter, and boundary layer turbulence. This research investigated the tracking challenge using a focal plane array sensor with centroid and peak tracking algorithms. Also investigated was the use of a deformable mirror to recreate optical phase distortions from boundary layer turbulence. Experiments were conducted with realistic channel effects for multiple look angles between a subsonic aircraft at 29 kft and geosynchronous satellite. Performance was determined by power delivered to an optical fiber. The results show that the two tracking algorithms can differ by up to one decibel of fiber power, with centroid tracking generally performing best. Conclusions are highly dependent on aircraft and spacecraft parameters but point towards centroid tracking for maximizing received power. Keywords: Lasercom, FPA Tracking, Boundary Layer Disturbances, Deformable Mirror.
by Ross Aaron Conrad.
S.M.
Maples, Bruce W., and Keith A. Fix. "An IF Sampling Digital Receiver Implementation for Space-based Command and Telemetry Applications." International Foundation for Telemetering, 2002. http://hdl.handle.net/10150/607493.
Повний текст джерелаThis paper describes an approach to the implementation of an IF sampling digital receiver for low data rate command and telemetry applications in the NASA Goddard Spaceflight Tracking and Data Network (STDN) and Air Force Space-Ground Link System (SGLS). The digital design is targeted for an FPGA-based implementation and was written entirely in VHDL. Several size and clock reduction techniques are described which were utilized due to limited gate-array resources and power. The system-level design architecture is described followed by a discussion of algorithms and performance of critical stages in the receiver chain. Bit error performance of the prototype receiver is also presented. Finally, although this design is specifically targeted for a narrowband command and telemetry application, the methodology forms the basis of a configurable receiver for higher data rate applications.
Burkes, Darryl A. "GROUND SUPPORT FOR THE SPACE-BASED RANGE FLIGHT DEMONSTRATION 2." International Foundation for Telemetering, 2007. http://hdl.handle.net/10150/604565.
Повний текст джерелаThe primary objective of the NASA Space-Based Range Demonstration and Certification program was to develop and demonstrate space-based range capabilities. The Flight Demonstration 2 flights at NASA Dryden Flight Research Center were conducted to support Range Safety (commanding and position reporting) and high-rate (5 Mbps) Range User (video and data) requirements. Required ground support infrastructure included a flight termination system computer, the ground-data distribution network to send range safety commands and receive range safety and range user telemetry data and video, and the ground processing systems at the Dryden Mission Control Center to process range safety and range user telemetry data and video.
Petit, Antoine. "Robust visual detection and tracking of complex objects : applications to space autonomous rendez-vous and proximity operations." Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00931604.
Повний текст джерелаLouw, Illka. "From designer through space to spectator : tracking an imaginative exchage between the actants of a scenographic event." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/11200.
Повний текст джерелаThe aim of this enquiry is to deepen the understanding of the author's practice as theatre designer, scenographer and visual dramaturge in a postdramatic milieu. This study creates a theoretical frame for a research-led performance that is especially dependent on the release of 'active energies of imagination' (Lehmann, 2006:16). The performance will take the form of a scenographic event,which does not depend on 'the principles of narration and figuration' (Lehmann, 2006:18). Instead it relies on a 'visual dramaturgy ' in which just as in front of a painting, activates the dynamic capacity of the gaze to produce processes, combinations and rhythms on the basis of the data provided by the stage' (Lehmann, 2006:157). The study proposes that the release of 'active energies of imagination' (2006:16) extends beyond the space of the live event, tracking its origin to the interaction between the designer and the materials of her art.
Kujiroaoka, Scott R., Russell G. Fielder, and Alvia D. Sandberg. "Current Status of Adding GPS Tracking Capability to a Missile Telemetry Section." International Foundation for Telemetering, 2008. http://hdl.handle.net/10150/606153.
Повний текст джерелаPast presented papers have discussed the integration efforts of incorporating Central Test & Evaluation Investment Program (CTEIP) sponsored Joint Advanced Missile Instrumentation (JAMI) components (namely the JAMI TSPI Unit-JTU), Commercial off the Shelf (COTS) parts (e.g. ARTM Tier I SO-QPSK Transmitter, Encryptor and Thermal Battery), and in-house developed devices (such as PCM Encoder and Dual Band Antenna) into a five-inch diameter Missile Telemetry (TM) Section. A prototype of this TM Section has been built up and integrated into an All Up Round (AUR) Missile and twice flown as a Captive Carried Test Missile (CTM) on an F/A-18 jet with great success. This TM Section is in the process of undergoing flight qualification testing (including environmental and electro-magnetic interference-EMI tests). After which it will be ready for mass production. This paper will detail these current efforts. In addition, the effort to upgrade some Navy and Air Force Test Ranges (with JAMI Ground Stations and Decommutators/Demodulators) to track and gather data from this Missile containing the new TM section will be discussed. Future plans to incorporate Flight Termination System (FTS) capabilities into the TM section will be covered as well.
Strausz, Laszlo. "Traveling through Space: Stylistic Progression and Camera Movement." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-04202007-122230/.
Повний текст джерелаTitle from file title page. Greg M. Smith, committee chair; Charlie Keil, Ted Friedman, Kathy Fuller-Seeley, Angelo Restivo, committee members. Electronic text (310 p. : ill. (some col.)) : digital, PDF file. Description based on contents viewed Oct. 17, 2007. Includes bibliographical references (p. 276-283).
Arredal, Martin. "Eye Tracking’s Impact on Player Performance and Experience in a 2D Space Shooter Video Game." Thesis, Blekinge Tekniska Högskola, Institutionen för datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-17823.
Повний текст джерелаHarwood, Peter, Christopher Wilson, Arthur Sullivan, and Eugene Augustin. "LOW COST, HIGHLY TRANSPORTABLE, TELEMETRY TRACKING SYSTEM FEATURING THE AUGUSTINE/SULLIVAN DISTRIBUTION AND POLARIZATION, FREQUENCY AND SPACE DIVERSITY." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/608364.
Повний текст джерелаThe tracking system is part of a telemetry ground station being developed for the UK Ministry of Defence. The design objective is a self-contained transportable system for field use in a vehicle or workshop environment, so that the system components are required to be man portable. Comprehensive facilities are required for the reception, display and analysis of telemetry data from a remote 1430-1450MHz airborne source at ranges of up to 205km. Since tracking over water is a prime requirement the system must accommodate severe multipath fading. A detailed analysis of the link budget indicates that there is a major conflict between cost, portability, antenna size and the receiver complexity required to achieve a satisfactory performance margin. A baseline system is analysed using a four foot antenna. Methods for improving the performance are then considered including polarisation, frequency and space diversity coupled with alternative antenna types and configurations. The optimum solution utilises two six foot diameter shaped beam single axis antennas of unique design in conjunction with a receiving system which economically combines the elements of polarisation, frequency and space diversity.
Cardona, Tommaso. "Tracking, photometry and spectroscopy of space debris: the Malindi, Loiano, Las Campanas and Cerro Tololo observation campaign results." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5905/.
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