{"id":10183,"date":"2026-04-09T09:11:36","date_gmt":"2026-04-09T09:11:36","guid":{"rendered":"https:\/\/www.proefschriftmaken.nl\/portfolio\/ricardo-reinoso\/"},"modified":"2026-04-23T07:40:02","modified_gmt":"2026-04-23T07:40:02","slug":"ricardo-reinoso","status":"publish","type":"us_portfolio","link":"https:\/\/www.proefschriftmaken.nl\/en\/portfolio\/ricardo-reinoso\/","title":{"rendered":"Ricardo Reinoso"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"author":8,"featured_media":12822,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"us_portfolio_category":[45],"class_list":["post-10183","us_portfolio","type-us_portfolio","status-publish","has-post-thumbnail","hentry","us_portfolio_category-new-template"],"acf":{"naam_van_het_proefschift":"Advanced Techniques to Process Differential Phase Measurements for Polarimetric X-band Weather Radars","samenvatting":"Er is geen Nederlandse samenvatting beschikbaar. De Engelse samenvatting vind je <a href=\"https:\/\/www.proefschriftmaken.nl\/en\/portfolio\/ricardo-reinoso\/\">hier<\/a>.","summary":"Observations of weather phenomena have attracted many researchers because of their\nmicrophysical complexity, space-time variability, and more important, their impact on\nhuman life. In the efforts of studying weather, researchers have used a diverse num-\nber of instruments to obtain both in-situ (towers, tethered balloons, and weather station\nnetworks) and remote (radar, lidar, satellite) measurements. In this study, weather mea-\nsurements are obtained using ground-based weather radars, which are able to scan over\na large space domain. Radar measurements require complex processes to extract reli-\nable information that can be used by weather institutions, companies, and citizens. In\nthis thesis, innovative methods are presented to process weather radar measurements,\nacquired at X-band frequencies, with the aim of capturing the natural variability of storm\nevents.\n\nWeather radars acquire data from scanned hydrometeor targets, such as groups of\nrain and ice particles. In Chapter 2, general concepts regarding weather radars and scat-\ntering theory are discussed, with an emphasis on X-band frequencies. At these frequen-\ncies, the signal that is transmitted and received by the radar can be signi\ufb01cantly atten-\nuated by hydrometeors. One way to mitigate such limitation is by using polarimetric\ntechnology in which two signals are transmitted, one in the horizontal and one in the\nvertical plane. In this context, polarimetric variables such as re\ufb02ectivity Z , differential\nre\ufb02ectivity ZDR , speci\ufb01c differential phase KDP , speci\ufb01c attenuation A, and backscatter-\ning differential phase \u03b4hv are de\ufb01ned and their relations in rain are studied using scat-\ntering simulation.\n\nThe bene\ufb01ts and limitations of using a polarimetric X-band radar for the observa-\ntion of convective weather are examined in Chapter 3. For such purpose, a squall line\nevent over North-Western Europe is used and multiple data sources, which are available\nin the Netherlands (NL), are introduced. Radar observations are obtained from two op-\nerational C-band radars and one research polarimetric X-band radar, hereafter IDRA, to\ncompare Z observations at different spatial and temporal resolutions. It is demonstrated\nthat the observations from IDRA, at 30 m and 1 min resolution, provide a more detailed\nstructure of a speci\ufb01c region of the squall line compared to those from C-band radars at\n1 km and 5 min resolution. However, observations behind regions of heavy rain were not\npossible using IDRA due to total attenuation.\n\nIn Chapter 4, a method is proposed to estimate accurate KDP in rain at X-band fre-\nquencies. In the formulation of the KDP estimator, measurements of Z and ZDR , after\nattenuation correction, are included to obtain KDP estimates at range resolution scales.\nThis method is demonstrated using four storm events, associated with light and heavy\nrain, observed in the NL by the X-band IDRA radar. It is shown that the proposed method\nis able to accurately estimate KDP in both light and heavy rain with standard deviation\nvalues in the order of 0.1 \u25e6 km\u22121 while maintaining the structure of the storms.\n\nBased on the method given in Chapter 4, Chapter 5 suggests advanced methods to improve estimates of A and \u03b4hv in convective storm cells that are observed at X-band\nfrequencies. Three established methods to estimate A are implemented while two meth-\nods to estimate KDP are considered. The \ufb01ve methods are examined using three storm\nevents, observed within a maximum range of 15 km. Because the three methods to esti-\nmate A require KDP estimates, the analyses show that improved estimates of A are pos-\nsible when the KDP technique given in Chapter 4 is employed. In contrast, incorrect esti-\nmates of A are seen when KDP is calculated by the conventional range-\ufb01ltering method.\nMoreover, \u03b4hv -KDP scatterplots exhibited signi\ufb01cant agreement to empirical relations\nand quantitative analyses showed that the accuracy of \u03b4hv is on the order of 1.5\u25e6.","auteur":"Ricardo Reinoso","auteur_slug":"ricardo-reinoso","publicatiedatum":"21 september 2018","taal":"EN","url_flipbook":"https:\/\/ebook.proefschriftmaken.nl\/ebook\/ricardoreinoso?iframe=true","url_download_pdf":"","url_epub":"","ordernummer":"FTP-202604090906","isbn":"978-94-6366-063-1","doi_nummer":"","naam_universiteit":"TU Delft","afbeeldingen":12822,"naam_student:":"","binnenwerk":"","universiteit":"TU Delft","cover":"","afwerking":"","cover_afwerking":"","design":""},"_links":{"self":[{"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/us_portfolio\/10183","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/us_portfolio"}],"about":[{"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/types\/us_portfolio"}],"author":[{"embeddable":true,"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/comments?post=10183"}],"version-history":[{"count":1,"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/us_portfolio\/10183\/revisions"}],"predecessor-version":[{"id":10184,"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/us_portfolio\/10183\/revisions\/10184"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/media\/12822"}],"wp:attachment":[{"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/media?parent=10183"}],"wp:term":[{"taxonomy":"us_portfolio_category","embeddable":true,"href":"https:\/\/www.proefschriftmaken.nl\/en\/wp-json\/wp\/v2\/us_portfolio_category?post=10183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}