VLBI receiver chain monitoring

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F13%3A00214245" target="_blank" >RIV/68407700:21340/13:00214245 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985882:_____/13:00396960

Výsledek na webu

<a href="http://dx.doi.org/10.1109/EFTF-IFC.2013.6702153" target="_blank" >http://dx.doi.org/10.1109/EFTF-IFC.2013.6702153</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/EFTF-IFC.2013.6702153" target="_blank" >10.1109/EFTF-IFC.2013.6702153</a>

Jazyk výsledku

angličtina

Název v původním jazyce

VLBI receiver chain monitoring

Popis výsledku v původním jazyce

The most demanding goal of the Global Geodetic Observing System initiative is the definition of station positions to an accuracy of 1mm and the corresponding velocities to 0.1 mm/year. The main remaining sources of error are caused by systematics, leading to intra- and inter- technique biases. In this work, we have focused on Very Long Base Interferometry (VLBI) and phase calibration generator currently in operation. This unit is injecting calibration tones into the detection chain through an input coupler located near the input of the antenna. The tones propagate further through entire detection chain and are recorded with the observed signal. Then they are extracted in post processing. These tones are generated out of an atomic frequency standard. The supplied frequency is significantly influenced by temperature and mechanical changes since usually a long cable is employed to bring the frequency to the calibration unit. To monitor the electrical length of the cable, calibration with

Název v anglickém jazyce

VLBI receiver chain monitoring

Popis výsledku anglicky

The most demanding goal of the Global Geodetic Observing System initiative is the definition of station positions to an accuracy of 1mm and the corresponding velocities to 0.1 mm/year. The main remaining sources of error are caused by systematics, leading to intra- and inter- technique biases. In this work, we have focused on Very Long Base Interferometry (VLBI) and phase calibration generator currently in operation. This unit is injecting calibration tones into the detection chain through an input coupler located near the input of the antenna. The tones propagate further through entire detection chain and are recorded with the observed signal. Then they are extracted in post processing. These tones are generated out of an atomic frequency standard. The supplied frequency is significantly influenced by temperature and mechanical changes since usually a long cable is employed to bring the frequency to the calibration unit. To monitor the electrical length of the cable, calibration with

Druh

D - Stať ve sborníku

CEP obor

JB - Senzory, čidla, měření a regulace

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2013 Joint European Frequency and Time Forum and International Frequency Control Symposium (EFTF/IFC)

ISBN

978-1-4799-0342-9

ISSN

—

e-ISSN

—

Počet stran výsledku

3

Strana od-do

854-856

Název nakladatele

IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society

Místo vydání

Piscataway

Místo konání akce

Prague

Datum konání akce

21. 7. 2013

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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