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The Celestial Reference Frame at X/Ka-band (8.4/32 GHz)

Show simple item record Jacobs, C. S. Clark, J. E. Skjerve, L. J. Sovers, O. J. Garcia-Miro, C. Horiuchi, S. 2013-10-28T20:27:30Z 2013-10-28T20:27:30Z 2011-02-30
dc.identifier.citation 20th European VLBI for geodesy and astrometry meeting en_US
dc.identifier.clearanceno 11-2171
dc.description.abstract We have constructed an X/Ka-band (8.4/32 GHz) celestial reference frame using fifty-two 24-hour sessions with the Deep Space Network. We detected 455 sources covering the full 24 hours of right ascension and declinations down to -45 deg. Comparison of 404 X/Ka sources in common with the S/Xband (2.3/8.4 GHz) ICRF2 shows wRMS agreement of 213 micro-arcsec (mas) in a cosd and 282 mas in d. There is evidence for systematic errors at the 100 mas level. Known errors include limited SNR, lack of phase calibration, troposphere mismodelling, and limited southern geometry. Compared to X-band, Ka-band allows access to more compact source morphology and reduced core shift. Existing X/Ka data and simulated Gaia data predict a frame tie precision of 10–15 mas (1-s, per 3-D rotation component) with anticipated improvements reducing that to 5–10 mas per component. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2011. en_US
dc.subject reference cystems en_US
dc.subject celestial frame en_US
dc.subject astrometry en_US
dc.subject interferometry en_US
dc.subject radio continuum en_US
dc.subject active galactic nuclei en_US
dc.title The Celestial Reference Frame at X/Ka-band (8.4/32 GHz) en_US
dc.type Preprint en_US

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