| タイトル | The Celestial Reference Frame at X/Ka-band (8.4/32 GHz) |
| 著者（英） | Skjerve, L. J.; Sovers, O. J.; Heflin, M. B.; Moll, V. E.; Jacobs, C. S.; Garcia-Miro, C.; Clark, J. E.; Horiuchi, S. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 2011-03-06 |
| 言語 | eng |
| 内容記述 | A celestial reference frame at X/Ka-band (8.4/32 GHz) has been constructed using fifty-one 24-hour sessions with the Deep Space Network. We report on observations which have detected 436 sources covering the full 24 hours of right ascension and declinations down to -45 deg. Comparison of this X/Ka-band frame to the S/X-band (2.3/8.4 GHz) ICRF2 shows wRMS agreement of 200 micro-arcsec in a cos delta and 290 micro-arcsec in delta. There is evidence for zonal errors at the 100 micro-arcsec level. Known errors include limited SNR, lack of phase calibration, troposphere mismodelling, and limited southern geometry. The motivations for extending the ICRF to frequencies above 8 GHz are to access more compact source morphology for improved frame stability, to provide calibrators for phase referencing, and to support spacecraft navigation at Ka-band. |
| NASA分類 | Space Sciences (General) |
| 権利 | Copyright |
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