Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Jamie McCallum"'
Autor:
Sigrid Böhm, Johannes Böhm, Jakob Gruber, Lisa Kern, Jamie McCallum, Lucia McCallum, Tiege McCarthy, Jonathan Quick, Matthias Schartner
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-16 (2022)
Abstract The deviation of Universal Time from atomic time, expressed as UT1−UTC, reflects the irregularities of the Earth rotation speed and is key to precise geodetic applications which depend on the transformation between celestial and terrestria
Externí odkaz:
https://doaj.org/article/d24cc070dbf646439af31c6d6b653f49
Autor:
Oleg Titov, Sándor Frey, Alexey Melnikov, Fengchun Shu, Bo Xia, Javier González, Belén Tercero, Leonid Gurvits, Aletha de Witt, Jamie McCallum, Mikhail Kharinov, Vladimir Zimovsky, Máté Krezinger
Publikováno v:
The Astronomical Journal, Vol 165, Iss 2, p 69 (2023)
Radio-loud quasars at high redshift ( z ≥ 4) are rare objects in the universe and rarely observed with Very Long Baseline Interferometry (VLBI). But some of them have flux density sufficiently high for monitoring of their apparent position. The ins
Externí odkaz:
https://doaj.org/article/5348dcfb94b84b5f87b69501d582e2b1
Publikováno v:
Sensors, Vol 18, Iss 5, p 1587 (2018)
The possibility to observe satellites with the geodetic Very Long Baseline Interferometry (VLBI) technique is vividly discussed in the geodetic community, particularly with regard to future co-location satellite missions. The Chinese APOD-A nano sate
Externí odkaz:
https://doaj.org/article/38770af14ef24f6ba79b917e2fd5fdd2
Publikováno v:
Health Affairs. 41:751-759
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b9c9c061d1ea89fb8573df87f118b1a
https://doi.org/10.1377/hlthaff.2021.01687
https://doi.org/10.1377/hlthaff.2021.01687
Autor:
Laura Thomas‐Walters, Jamie McCallum, Ryan Montgomery, Claire Petros, Anita K. Y. Wan, Diogo Veríssimo
Publikováno v:
Conservation Biology. 37
Understanding human behavior is vital to developing interventions that effectively lead to proenvironmental behavior change, whether the focus is at the individual or societal level. However, interventions in many fields have historically lacked robu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6de311cd6f42c9f9d824965a3c7f133c
https://doi.org/10.1111/cobi.14000
https://doi.org/10.1111/cobi.14000
Autor:
Jamie McCallum, Gabor Orosz, Hayley Bignall, Simon Ellingsen, Stanislav S. Shabala, N. M. M. Said, C. S. Reynolds, Jun Liu
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 508:2881-2896
We have investigated the evolution of the BL Lac object PKS B1144−379 using the University of Tasmania Ceduna 30-m radio telescope at a frequency of 6.7 GHz and very long baseline interferometry (VLBI) data at 8.6 GHz. Variability time-scales assoc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c8fd145c19afd21959340809840826d
https://doi.org/10.1093/mnras/stab2724
https://doi.org/10.1093/mnras/stab2724
Autor:
Lucia McCallum, Lim Chin Chuan, Hana Krásná, Jamie McCallum, Johannes Böhm, Tiege McCarthy, Jakob Gruber, Matthias Schartner, Jonathan Quick, Axl Rogers
Publikováno v:
Journal of Geodesy, 96 (10)
Global geodetic VLBI is upgrading to its next-generation observing system, VGOS. This upgrade has turned out to be a process over multiple years, until VGOS reaches its full capabilities with the envisaged continuous observations. Until then, for the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f387296ba0ff21d55cacce061c4bd57
https://hdl.handle.net/20.500.11850/574823
https://hdl.handle.net/20.500.11850/574823
Autor:
Stanislav S. Shabala, Jamie McCallum, Simon Ellingsen, C. S. Reynolds, Jun Liu, Hayley Bignall, N. M. M. Said
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 506:288-297
The highly variable BL Lac object PKS B1144 − 379 was monitored at 6.7 GHz using the Ceduna Radio Telescope with high cadence from 2003 to 2011. Intraday variations due to interstellar scintillation (ISS) were observed throughout the period. To com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69440646eac90cd76693c479a6eb2da4
https://doi.org/10.1093/mnras/stab1651
https://doi.org/10.1093/mnras/stab1651
In very-long-baseline interferometry (VLBI) observations, two or more telescopes observe distant quasars and record the radio emission at specific frequency ranges. The source flux densities and telescope sensitivities are two essential parameters fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b390699f1b8af4e26b2ebfc4c091b104
https://doi.org/10.21203/rs.3.rs-1655703/v1
https://doi.org/10.21203/rs.3.rs-1655703/v1
Autor:
Susanne Lunz, Anderson, James M., Ming Hui Xu, Robert Heinkelmann, Oleg Titov, Jean François Lestrade, Johnson, Megan C., Fengchun Shu, Wen Chen, Alexey Melnikov, Jamie McCallum, Yulia Lopez, Andrei Mikhailov, Pablo de Vicente Abad, Harald Schuh
Publikováno v:
Aalto University
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92ee89095d9b2fc0d8895a586507d833
https://doi.org/10.22323/1.399.0032
https://doi.org/10.22323/1.399.0032