GPS Time Disruptions on 26-Jan-2016

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Mujunen, Ari Aatrokoski, Juha Tornikoski, Merja Tammi, Joni 2016-03-12T10:01:00Z 2016-03-12T10:01:00Z 2016
dc.identifier.isbn 978-952-60-6703-2 (electronic)
dc.identifier.issn 1799-490X (electronic)
dc.identifier.issn 1799-4896 (ISSN-L)
dc.description.abstract On Tuesday, January 26th 2016 Aalto University Metsähovi Radio Observatory discovered that three out of its four GPS receivers on-site (used for monitoring the performance of four on-site hydrogen (H) maser atomic clocks) performed abrupt 13.0 microsecond time jumps in their "1pps" (one pulse per second) time synchronization outputs. The disruptions lasted for approximately 12 hours during which different GPS receiver units outputted erroneous time signal at different times, preventing their use for microsecond-level time synchronization. The event was later acknowledged by the 2nd Space Operations Squadron at the 50th Space Wing, Schriever Air Force Base, Colorado, USA, as an erroneous time correction parameter upload to GPS satellites. en
dc.format.extent 15
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Aalto University en
dc.publisher Aalto-yliopisto fi
dc.relation.ispartofseries Aalto University publication series SCIENCE + TECHNOLOGY en
dc.relation.ispartofseries 2/2016
dc.subject.other Space technology en
dc.title GPS Time Disruptions on 26-Jan-2016 en
dc.type D4 Julkaistu kehittämis- tai tutkimusraportti tai -selvitys fi Sähkötekniikan korkeakoulu fi School of Electrical Engineering en
dc.contributor.department Metsähovin radiotutkimusasema fi
dc.contributor.department Metsähovi Radio Observatory en
dc.subject.keyword radio astronomy en
dc.subject.keyword global positioning system en
dc.subject.keyword GPS en
dc.subject.keyword atomic clocks en
dc.subject.keyword timing en
dc.subject.keyword satellites en
dc.subject.keyword satellite navigation en
dc.identifier.urn URN:ISBN:978-952-60-6703-2
dc.type.dcmitype text en

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