تقرير
On More than Two Decades of Celestial Reference Frame VLBI Observations in the Deep South: IVS-CRDS (1995-2021)
| العنوان: | On More than Two Decades of Celestial Reference Frame VLBI Observations in the Deep South: IVS-CRDS (1995-2021) |
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| المؤلفون: | Weston, S., de Witt, A., Krasna, Hana, Bail, Karine Le, Hardon, Sara, Gordon, David, Fengchun, Shu, Fey, Alan, Schartner, Matthias, Basu, Sayan, Titov, Oleg, Behrend, Dirk, Jacobs, Christopher S., Hankey, Warren, Salguero, Febreico, Reynolds, John E. |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | The International VLBI Service for Geodesy & Astrometry (IVS) regularly provides high-quality data to produce Earth Orientation Parameters (EOP), and for the maintenance and realization of the International Terrestrial and Celestial Reference Frames, ITRF and ICRF. The first iteration of the celestial reference frame (CRF) at radio wavelengths, the ICRF1, was adopted by the International Astronomical Union (IAU) in 1997 to replace the FK5 optical frame. Soon after, the IVS began official operations and in 2009 there was a significant increase in data sufficient to warrant a second iteration of the CRF, ICRF2. The most recent ICRF3, was adopted by the IAU in 2018. However, due to the geographic distribution of observing stations being concentrated in the Northern hemisphere, CRFs are generally weaker in the South due to there being fewer Southern Hemisphere observations. To increase the Southern Hemisphere observations, and the density, precision of the sources, a series of deep South observing sessions was initiated in 1995. This initiative in 2004 became the IVS Celestial Reference Frame Deep South (IVS-CRDS) observing program. This paper covers the evolution of the CRDS observing program for the period 1995 to 2021, details the data products and results, and concludes with a summary of upcoming improvements to this ongoing project. Comment: 25 pages, 16 figures, 3 tables, accepted for publication in PASA 2nd June 2023. Resubmit as a co-author was missed in the arXiv metadata, paper is the same |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2306.06830 |
| رقم الأكسشن: | edsarx.2306.06830 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |