【摘 要】
：
An X/Ka-band (8.4/32 GHz) celestial reference frame has been constructed using a combined NASA and ESA Deep Space Network.Observations at X/Ka-band are motivated by their ability to access more compac
【机 构】
：
Jet Propulsion Laboratory,California Institute of Technology/NASA United States
【出 处】
：
The International VLBI Service for Geodesy and Astrometry (I
论文部分内容阅读
An X/Ka-band (8.4/32 GHz) celestial reference frame has been constructed using a combined NASA and ESA Deep Space Network.Observations at X/Ka-band are motivated by their ability to access more compact source morphology and reduced core shift relative to observations at the historically standard S/X-band.In 86 observing sessions we detected 631 sources covering the full 24 hours of right ascension and the full range of declinations.
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