?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Dise%C3%B1o+de+herramienta+MATLAB+para+el+c%C3%A1lculo+del+retardo+ionosf%C3%A9rico&rft.creator=Mart%C3%ADn+G%C3%B3mez%2C+Mar%C3%ADa&rft.contributor=Rueda+Fr%C3%ADas%2C+Carlos&rft.subject=Computer+Science&rft.subject=Telecommunications&rft.description=Actualmente%2C+el+uso+de+navegadores+y+aplicaciones+para+el+c%C3%A1lculo+de+la+ubicaci%C3%B3n+en+tiempo+real+es+algo+que+utilizan+diariamente+y+de+forma+global+millones+de+usuarios.+Los+sistemas+que+realizan+este+tipo+de+c%C3%A1lculos+son+los+sistemas+GNSS+(Global+Navigation+Satellite+System+o+Sistema+Global+de+Navegaci%C3%B3n+por+Sat%C3%A9lite).+El+problema+que+nos+encontramos+es+que+para+realizar+el+c%C3%A1lculo+de+esa+posici%C3%B3n+de+forma+precisa%2C+hay+que+solventar+distintos+tipos+de+errores.+Las+fuentes+de+error+se+encuentran+en+el+sat%C3%A9lite%2C+en+el+receptor%2C+en+la+estaci%C3%B3n+y+en+la+propagaci%C3%B3n+de+la+se%C3%B1al.+Dentro+de+los+errores+que+se+producen+en+la+propagaci%C3%B3n+de+la+se%C3%B1al%2C+se+encuentra+el+retardo+ionosf%C3%A9rico%2C+el+cual+se+ha+escogido+para+su+an%C3%A1lisis+en+este+proyecto.+En+este+proyecto+se+va+a+desarrollar+una+aplicaci%C3%B3n+para+obtener+el+retardo+producido+por+la+ionosfera+y+poder+calcular+con+mayor+precisi%C3%B3n+la+posici%C3%B3n+de+un+receptor.+La+ionosfera+es+una+capa+de+la+atm%C3%B3sfera%2C+que+aparte+de+ser+un+medio+ionizado%2C+es+un+medio+dispersivo%2C+por+lo+que+depende+de+la+frecuencia.+Esta+dependencia+de+la+frecuencia+nos+permite+eliminar+el+retardo+ionosf%C3%A9rico+cuando+se+utilizan+mediciones+de+dos+frecuencias.+Sin+embargo%2C+los+receptores+de+una+sola+frecuencia+no+pueden+eliminar+este+retardo%2C+por+lo+que+necesitan+aplicar+un+modelo+de+predicci%C3%B3n+ionosf%C3%A9rica.+Actualmente+existen+dos+modelos+que+utilizan+los+principales+sistemas+GNSS%2C+el+modelo+de+Klobuchar+y+el+modelo+de+NeQuick.+La+aplicaci%C3%B3n+desarrollada+incorpora+ambos+modelos+para+que+el+usuario+seleccione+el+modelo+que+quiere+analizar%2C+y+as%C3%AD+poder+comparar+los+resultados+obtenidos.+Se+han+seleccionado+cuatro+casos+en+los+que+el+receptor+y+el+sat%C3%A9lite+se+encentran+en+posiciones+diferentes%2C+con+la+finalidad+de+concluir+si+ambos+modelos+son+v%C3%A1lidos+para+todos+los+casos+y+qu%C3%A9+cantidad+de+error+producido+por+la+ionosfera+se+debe+corregir.++Abstract%3A+Currently%2C+the+use+of+navigators+and+applications+to+calculate+location+in+real+time+is+something+that+millions+of+users+use+daily+and+globally.+The+systems+that+perform+this+type+of+calculations+are+the+GNSS+systems.+The+problem+we+find+is+that+to+do+the+calculation+of+that+position+accurately%2C+we+must+solve+different+types+of+errors.+The+sources+of+error+are+found+in+the+satellite%2C+in+the+receiver%2C+in+the+station+and+in+the+propagation+of+the+signal.+Among+the+errors+that+occur+in+the+propagation+of+the+signal%2C+is+the+ionospheric+delay%2C+which+has+been+chosen+for+analysis+in+this+project.+In+this+project+an+application+will+be+developed+to+obtain+the+delay+produced+by+the+ionosphere+and+to+be+able+to+calculate+with+greater+precision+the+position+of+a+receiver.+The+ionosphere+is+a+layer+of+the+atmosphere%2C+which+apart+from+being+an+ionized+medium%2C+is+a+dispersive+medium%2C+so+it+depends+on+the+frequency.+This+dependence+on+frequency+allows+us+to+eliminate+the+ionospheric+delay+when+two-frequency+measurements+are+used.+However%2C+single+frequency+receivers+can+not+eliminate+this+delay%2C+so+they+need+to+apply+an+ionospheric+prediction+model.+Currently%2C+there+are+two+models+that+use+the+main+GNSS+systems%2C+the+Klobuchar+model+and+the+NeQuick+model.+The+developed+application+incorporates+both+models+so+that+the+user+selects+the+model+he+wants+to+analyze%2C+and+thus+be+able+to+compare+the+results+obtained.+Four+cases+have+been+selected+in+which+the+receiver+and+the+satellite+are+located+in+different+positions%2C+in+order+to+conclude+whether+both+models+are+valid+for+all+cases+and+how+much+error+produced+by+the+ionosphere+should+be+corrected.&rft.publisher=E.T.S.I+y+Sistemas+de+Telecomunicaci%C3%83%C2%B3n+(UPM)&rft.rights=https%3A%2F%2Fcreativecommons.org%2Flicenses%2Fby-nc-nd%2F3.0%2Fes%2F&rft.date=2019-07-03&rft.type=info%3Aeu-repo%2Fsemantics%2FbachelorThesis&rft.type=Final+Project&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=spa&rft.format=application%2Fzip&rft.language=spa&rft.rights=info%3Aeu-repo%2Fsemantics%2FrestrictedAccess&rft.identifier=https%3A%2F%2Foa.upm.es%2F56728%2F