{"id":100573,"date":"2018-03-11T10:22:07","date_gmt":"2018-03-11T10:22:07","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/recise-gps-based-position-velocity-and-acceleration-determination-algorithms-and-tools\/"},"modified":"2018-03-11T10:22:07","modified_gmt":"2018-03-11T10:22:07","slug":"recise-gps-based-position-velocity-and-acceleration-determination-algorithms-and-tools","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ingenieria-y-tecnologia-aeronauticas\/recise-gps-based-position-velocity-and-acceleration-determination-algorithms-and-tools\/","title":{"rendered":"Recise gps-based position, velocity and acceleration determination: algorithms and tools"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Dagoberto Jose Salazar Hernandez <\/strong><\/h2>\n<p>This ph.D. Thesis focuses on the development of algorithms and tools for precise gps-based position, velocity and  acceleration determination very far from reference stations in post-process mode. one of the goals of this thesis was to develop a set of state-of-the-art gnss data processing tools, and make them  available for the research community. Therefore, the software development effort was done within the frame of a  preexistent open source project called the gpstk. Therefore, validation of the gpstk pseudorange-based processing  capabilities with a trusted gps data processing tool was one of the initial task carried out in this work. gnss data management proved to be an important issue when trying to extend gpstk capabilities to carrier phase- based data processing algorithms. In order to tackle this problem the gnss data structures (gds) and their  associated processing paradigm were developed. With this approach the gnss data processing becomes like an  assembly line, providing an easy and straightforward way to write clean, simple to read and use software that speeds  up development and reduces errors. the extension of gpstk capabilities to carrier phase-based data processing algorithms was carried out with the help  of the gds, adding important accessory classes necessary for this kind of data processing and providing reference  implementations. The performance comparison of these relatively simple gds-based source code examples with  other state-of-the art precise point positioning (ppp) suites demonstrated that their results are among the best.  furthermore, given that the gds design is based on data abstraction, it allows a very flexible handling of concepts  beyond mere data encapsulation, including programmable general solvers, among others. the problem of post-process precise positioning of gps receivers hundreds of kilometers away from nearest  reference station at arbitrary data rates was dealt with, overcoming an important limitation of classical post-processing  strategies like ppp. The advantages of gds data abstraction regarding solvers were used to implement a kinematic  ppp-like processing based on a network of stations. This procedure was named precise orbits positioning (pop)  because it is independent of precise clock information and it only needs precise orbits to work. The results from this  approach were very similar (as expected) to the standard kinematic ppp processing strategy, but yielding a higher  positioning rate. Also, the network-based processing of pop seems to provide additional robustness to the results,  even for receivers outside the network area. the last part of this thesis focused on implementing, improving and testing algorithms for the precise determination of  velocity and acceleration hundreds of kilometers away from nearest reference station. Special emphasis was done on  the kennedy method because of its good performance. A reference implementation of kennedy method was  developed, and several experiments were carried out. Experiments done with very short baselines showed a flaw in  the way satellite velocities were computed, introducing biases in the velocity solution. A relatively simple modification  was proposed, and it reduced the rms of 5-min average velocity 3d errors by a factor of over 35. then, borrowing ideas from kennedy method and the pop method, a new velocity and acceleration determination  procedure named eva was developed and implemented that greatly extends the effective range. An experiment using  a light aircraft flying over the pyrenees showed that both the modified-kennedy and eva methods were able to cope  with the dynamics of this type of flight. Finally, both modified-kennedy and eva method were applied to a challenging  scenario in equatorial south america, with baselines over 1770 km, where eva method showed a clear advantage in  both averages and standard deviations for all components of velocity and acceleration.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Recise gps-based position, velocity and acceleration determination: algorithms and tools<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Recise gps-based position, velocity and acceleration determination: algorithms and tools <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Dagoberto Jose Salazar Hernandez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 29\/04\/2010<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Jaime Sanz Subirana<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: f\u00e9lix Tor\u00e1n mart\u00ed <\/li>\n<li>robert benjamin Harris (vocal)<\/li>\n<li>  (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Dagoberto Jose Salazar Hernandez This ph.D. Thesis focuses on the development of algorithms and tools for precise [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[31013,9021,33513,15596,21169],"tags":[204775,135157,135162,204776],"class_list":["post-100573","post","type-post","status-publish","format-standard","hentry","category-geodesia-de-satelites","category-ingenieria-y-tecnologia-aeronauticas","category-navegacion-geodesica","category-politecnica-de-catalunya","category-satelites-artificiales","tag-dagoberto-jose-salazar-hernandez","tag-felix-toran-marti","tag-jaime-sanz-subirana","tag-robert-benjamin-harris"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/100573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=100573"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/100573\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=100573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=100573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=100573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}