<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-06-19T13:03:47Z</responseDate><request verb="GetRecord" identifier="oai:riubu.ubu.es:10259/7010" metadataPrefix="marc">https://riubu.ubu.es/oai/request</request><GetRecord><record><header><identifier>oai:riubu.ubu.es:10259/7010</identifier><datestamp>2024-05-17T09:27:54Z</datestamp><setSpec>com_10259.4_104</setSpec><setSpec>com_10259_2604</setSpec><setSpec>col_10259_6848</setSpec></header><metadata><record xmlns="http://www.loc.gov/MARC21/slim" xmlns:doc="http://www.lyncode.com/xoai" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd">
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<datafield tag="042" ind1=" " ind2=" ">
<subfield code="a">dc</subfield>
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<datafield tag="720" ind1=" " ind2=" ">
<subfield code="a">Serrano Mira, Lidia</subfield>
<subfield code="e">author</subfield>
</datafield>
<datafield tag="720" ind1=" " ind2=" ">
<subfield code="a">Pérez Sanz, Luis</subfield>
<subfield code="e">author</subfield>
</datafield>
<datafield tag="720" ind1=" " ind2=" ">
<subfield code="a">Pérez Castán, Javier Alberto</subfield>
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<datafield tag="260" ind1=" " ind2=" ">
<subfield code="c">2021-07</subfield>
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<subfield code="a">The SESAR programme aims at developing the future European air traffic management&#xd;
system. It focuses on four keys areas: capacity, safety, efficiency and environment. In view&#xd;
of the expected growth in air traffic demand in the coming years, the current goal is to&#xd;
increase the airspace capacity, which is already close to saturation in many cases.&#xd;
Currently, the separation standards applied in a given volume of airspace are fixed, both&#xd;
horizontally and vertically, which means that in many cases this is one of the determining&#xd;
factors of capacity. Separation management is an area where improvement is sought, in&#xd;
particular through the application of new operational concepts (separation modes) which&#xd;
include the redefinition of aircraft separation minima. One of the solutions to be&#xd;
investigated is the variable (Ad Hoc) separation proposal put forward by SESAR.&#xd;
This future concept implies a change in the application of separation minima from the&#xd;
current fixed standards to a new variable approach. With this new concept, ATCo (Air&#xd;
Traffic Controller) would separate aircraft by applying different separation minima in the&#xd;
same volume of airspace. These separation values are tactically determined for each&#xd;
particular aircraft pair (Ad Hoc) depending on a number of factors: aircraft categories,&#xd;
encounter geometry, atmospheric conditions, etc.&#xd;
Applying different separation minima in the same volume of airspace implies a substantial&#xd;
change in some of the ATC activities. Also, new functionalities in ATC support tools are&#xd;
needed. This study presents the Ad Hoc separation operational concept and provides the&#xd;
basis for the development of the algorithm for calculating variable separation minima.</subfield>
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<datafield tag="024" ind2=" " ind1="8">
<subfield code="a">978-84-18465-12-3</subfield>
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<datafield tag="024" ind2=" " ind1="8">
<subfield code="a">http://hdl.handle.net/10259/7010</subfield>
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<datafield tag="024" ind2=" " ind1="8">
<subfield code="a">10.36443/10259/7010</subfield>
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<datafield ind1=" " ind2=" " tag="653">
<subfield code="a">Seguridad</subfield>
</datafield>
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<subfield code="a">Tráfico aéreo</subfield>
</datafield>
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<subfield code="a">Safety</subfield>
</datafield>
<datafield ind1=" " ind2=" " tag="653">
<subfield code="a">Air traffic</subfield>
</datafield>
<datafield tag="245" ind1="0" ind2="0">
<subfield code="a">Ad Hoc Minimum Separation: A challenge for Air Traffic Control (ATC)</subfield>
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