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Automated booking and scheduling for CubeSats: Development of an automated Scheduling engine for satellite communication with emphasis on communication with CubeSats
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis work details the development of an automatic scheduling engine for

satellite communication from the operational stand point of a ground station. The

aim has been to create a scheduling engine that autonomously calculates passes

for a large number of satellites over a ground station and assigns these passes to

appropriate resources. The process used can be described as rule based scheduling,

where each satellite is assigned a set of specic requirements that the scheduler

tries to satisfy in order to create a schedule that satises all specied requirements.

This approach is in contrast to the most commonly used scheduling today, where

satellite operators request passes and ground stations try to satisfy these requests,

often manually. With rule based scheduling satellite operators are instead allowed

to set requirements and the pass times are chosen automatically so as to optimize

the process and admit a higher utilization of available resources. It is shown that

a typical utilization of a ground stations resources of about 60% can be achieved.

In addition to the scheduling engine a simple web interface has been developed,

allowing the control of all parameters and scheduling through a web browser, thus

demonstrating the ability to make this system more widely accessible for a broader

range of users. The development of a rule based scheduler illustrates the possibility

of making the process of satellite to ground communications more streamlined from

the part of the ground station while at the same time permitting an increase in

the number of passes it can support.

Abstract [sv]

Det har examensarbetet beskriver utvecklingen av en autonom schemalaggare for

satellitkommunikation fran en markstations perspektiv. Syftet har varit att skapa

en autonom schemalaggare som pa egen hand beraknar passtider for ett stort antal

satelliter over en markstation och schemalagger dessa pass pa lampliga resurser.

Processen som anvands kan beskrivas som regelbaserad schemalaggning, dar varje

satellit som ska schemalaggas tilldelas ett antal specika krav som schemalaggaren

sedan forsoker tillfredsstalla for att pa sa satt skapa ett schema som tillfredsstaller

alla krav fran alla satellitoperatorer. Det har angreppssattet skiljer sig fran det

som anvands mest idag, dar satellitoperatorer staller detaljerade krav pa vilka pass

som ska bokas in hos markstationen, och personalen pa markstationen forsoker att

tillfredsstalla dessa krav sa langt det ar mojligt, ibland manuellt. Med regelbaserad

schemalaggning far satellitoperatorer istallet specicera ett set med krav for sina

satelliter, och schemalaggaren valjer passtider sa att alla krav for alla satelliter

tillgodoses pa ett sa eektivt satt som mojligt, sa att en hogre belaggning pa markstationen

kan uppnas an vad som annars vore mojligt. Det visas i dokumentet att

en belaggning pa ca 60 % ar mojlig med hjalp av regelbaserad schemalaggning;

hogre an normalscenariot for en markstation idag. Utover schemalaggaren har

ett webbaserat granssnitt utvecklats som mojliggor kontroll av satellitparametrar

och schemalaggning via en webblasare. Pa sa satt visas mojligheten att gora ett

sadant har system tillgangligt for ett brett spektrum av anvandare. Utvecklingen

av en automatiserad schemalaggare illustrerar mojligheten att forenkla processen

for passbokning av satellit till markstationskommunikation samtidigt som

en forhallandevis hog belaggning kan uppnas.

Place, publisher, year, edition, pages
2015. , 90 p.
EES Examensarbete / Master Thesis, XR-EE-SPP 2014:007
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-160615OAI: diva2:790544
Educational program
Master of Science in Engineering - Vehicle Engineering; Master of Science - Aerospace Engineering
Available from: 2015-02-25 Created: 2015-02-25 Last updated: 2015-02-25Bibliographically approved

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